# Jiangsu Hearthvane Forging Co Ltd (Hearthvane Forging)

> Integrated Chinese manufacturer of open-die forgings, seamless rolled rings and forged shafts in alloy steel, carbon steel, stainless and duplex steel, and nickel-based superalloys. Melting, VIM/VAR/ESR remelting, 6300 t and 4000 t press forging, heat treatment, CNC machining and testing on one site in Changzhou, Jiangsu, China.

## Key facts
- Founded: March 2003
- Address: Xueyan Town Industrial Concentration Zone, Wujin District, Changzhou City, Jiangsu Province, China
- Site: 80,000 m² (120 mu); fixed assets RMB 385 million
- Capacity: 150,000 t/yr ingots; 120,000 t/yr forgings; 3,000–10,000 t/yr nickel alloys
- Melting: 2 × 30 t EAF, 30 t LF, 30 t VOD, 2 t induction furnace
- Remelting: 3 t VIM, 6 t VAR, 6 t IGESR (argon-shielded ESR), 3 t ESR
- Forging: 6300 t and 4000 t hydraulic presses, 2000 t fast-forging press, 0.75/1/3/5 t electro-hydraulic hammers
- Size limits: single forging up to 35 t; rings to 5,000 mm OD; shafts to 12,000 mm; discs to 3,500 mm; CNC turning to 2,500 mm dia.
- Finishing: 10 computer-controlled heat-treatment furnaces; 30 heavy CNC machine tools
- Approvals: CCS, DNV, ABS, Lloyd’s Register, Bureau Veritas; ISO 9001:2015, ISO 14001:2015, ISO 45001:2018
- Documentation: EN 10204 3.1 material test reports; 100% volumetric UT; heat-number traceability
- R&D: Jiangsu Provincial Heavy Forging Engineering Technology R&D Center (2009); cooperation with Tsinghua University and Northeastern University
- Markets: exported to 30+ countries; aerospace, petrochemical, marine/offshore, nuclear and pressure vessels, rail and heavy machinery
- Contact: sales@forgingmaterial.com; phone 0086-19941580013; WhatsApp 0086-19941580013; website www.forgingmaterial.com; quotations within 24 hours

## Pages
- [Home](https://www.forgingmaterial.com/): company overview, process, equipment, grades, corrosion guide, quality, FAQ, RFQ
- [Contact us](https://www.forgingmaterial.com/contact.html): email, phone, WhatsApp, plant address, office hours and RFQ form
- [Grade catalog](https://www.forgingmaterial.com/#grades)
- [Corrosion guide](https://www.forgingmaterial.com/#corrosion)
- [FAQ](https://www.forgingmaterial.com/#faq)
- [Full data in Markdown](https://www.forgingmaterial.com/llms-full.txt)

## Grade catalog

### Alloy & carbon steel

| Grade | Family | ASTM/ASME | EN / W.Nr. | UNS | Service temp. | Forms | Applications |
|---|---|---|---|---|---|---|---|
| 42CrMo4 / AISI 4140 | Cr-Mo High-Strength Steel | ASTM A182 / ASTM A29 / AISI 4140 | 1.7225 / 42CrMo4 | UNS G41400 | -40°C to 500°C | Forged Shaft, Rolled Ring, Round Bar, Die Block, Hollow Cylinder | High-stress crane shafts; Wind turbine main shafts; Oilfield drill collars; Extruder screws; Heavy gears and pinions |
| 34CrNiMo6 / AISI 4340 | Ni-Cr-Mo High-Toughness Steel | ASTM A29 / AISI 4340 / AMS 6414 | 1.6582 / 34CrNiMo6 | UNS G43400 | -50°C to 450°C | Forged Shaft, Rolled Ring, Rotor Forging, Die Block | Aerospace landing gear pins; Steam turbine rotor forgings; Heavy rail axles; Diesel engine crankshafts |
| 17CrNiMo6-4 / 18CrNiMo7-6 | Carburizing Gear Steel | ASTM A837 / AISI 4320 Mod | 1.6587 / 18CrNiMo7-6 (17CrNiMo6) | UNS G43200 | -40°C to 300°C | Rolled Ring, Gear Blank, Forged Shaft, Pinion Forging | High-speed rail reduction gearboxes; Wind turbine gearbox rings; Mining excavator drive gears; Marine propulsion gears |
| ASTM A182 F22 / ASME SA336 Gr. F22 | 2.25Cr-1Mo Creep-Resistant Steel | ASTM A182 F22 / ASME SA336 F22 Class 1/3 | 1.7380 / 10CrMo9-10 | UNS K21590 | Up to 580°C | High-Pressure Flange, Forged Valve Body, Tubesheet, Hollow Forging, Rolled Ring | Hydroprocessing reactors; Power plant steam headers; Boiler pressure vessel nozzles; Petrochemical cracking units |
| SA 336 Gr. F22V | Vanadium-Modified 2.25Cr-1Mo | ASME SA336 / SA541 Grade 22V | 1.7383 Mod | UNS K31835 | Up to 500°C | Reactor Shell Ring, Heavy Forged Head, Channel Flange, Nozzle Forging | Modern heavy hydrocrackers; Desulfurization reactors; High-pressure hydrogen vessels |
| ASTM A182 F11 / SA 336 Gr. F11 | 1.25Cr-0.5Mo Creep Steel | ASTM A182 F11 / ASME SA336 F11 Class 2 | 1.7335 / 13CrMo4-5 | UNS K11572 | Up to 550°C | Forged Valve Body, Pipe Flange, Tubesheet, Round Bar | Superheated steam lines; Thermal power plant boiler components; Heat exchanger shells |
| ASTM A182 F12 / SA 336 Gr. F12 | 1Cr-0.5Mo Pressure Vessel Steel | ASTM A182 F12 / ASME SA336 F12 | 1.7335 / 13CrMo4-5 | UNS K11562 | Up to 540°C | Forged Flange, Fittings Forging, Shaft, Blind Flange | Steam piping, refinery pressure systems, valves and fittings |
| ASTM A182 F91 / SA336 Gr. F91 | 9Cr-1Mo-V Supercritical Steel | ASTM A182 F91 / ASME SA336 F91 / ASME SA182 F91 | 1.4903 / X10CrMoVNb9-1 | UNS K90901 | Up to 620°C | Main Steam Valve Body, Steam Header Forging, T-Piece, Turbine Rotor Ring | Ultra-supercritical power plant piping; High-pressure steam turbines; Heat recovery steam generators (HRSG) |
| ASTM A182 F92 / SA336 Gr. F92 | 9Cr-2W-V Supercritical Steel | ASTM A182 F92 / ASME SA336 F92 | 1.4901 / X10CrMoVNb9-2 | UNS K92460 | Up to 650°C | Steam Valve Forging, Header Forging, Turbine Ring | Advanced ultra-supercritical (A-USC) thermal power generation components |
| ASTM A182 F9 / SA182 F9 | 9Cr-1Mo High-Alloy Creep Steel | ASTM A182 F9 / ASME SA182 F9 | 1.7386 / X12CrMo9-1 | UNS K90941 | Up to 600°C | Flanges, Fittings, Valve Blocks, Rings | Refinery catalytic crackers, coking units, high-temperature furnace tube flanges |
| ASTM A182 F1 / SA 336 Gr. F1 | Carbon-Molybdenum (C-Mo) Steel | ASTM A182 F1 / ASME SA336 F1 | 1.5415 / 16Mo3 | UNS K12822 | Up to 480°C | Forged Flange, Nozzle, Shaft, Blind Flange | Boiler drums, moderate pressure piping, steam valves |
| ASME SA 508 Gr. 3 / SA 508 Gr. 4 | Nuclear Reactor Pressure Vessel Steel | ASME SA-508 / SA-508M Grade 3 Class 1/2 | 1.6310 / 20MnMoNi4-5 | UNS K12042 | -20°C to 350°C | Reactor Shell Flange, Transition Ring, Nozzle Forging, Heavy Integral Head | Nuclear reactor pressure vessels (RPV); Steam generator lower heads; Pressurizer forgings |
| ASTM A470 / A470M Class 4 / 7 / 8 | Steam Turbine Rotor Forgings | ASTM A470 Class 4, Class 7, Class 8 | 1.6981 / 21CrMoNiV4-7 / 1.4922 | — | Up to 565°C | Turbine Rotor Shaft, Generator Shaft, Coupling Ring | Steam turbine HP/IP rotors, gas turbine compressor shafts, industrial blowers |
| ASTM A471 / A471M Class 1 to 11 | Turbine Rotor Disc Forgings | ASTM A471M Class 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 | 1.6957 / 26NiCrMoV11-5 | — | -40°C to 450°C | Turbine Disc, Impeller Forging, Bladed Rotor Disc | Steam turbine low-pressure discs, centrifugal compressor wheels, expander discs |
| ASME SA-350 LF1 / LF2 / LF3 / LF5 / LF6 | Low-Temperature Toughness Forgings | ASTM A350 / ASME SA350 Grade LF1, LF2 Cl 1/2, LF3, LF6 Cl 1/2 | 1.0425 (LF2) / 1.5637 (LF3 3.5%Ni) | UNS K03011 (LF2) / UNS K32025 (LF3) | -46°C (LF2) down to -101°C (LF3) | Forged Flange, Fittings, Wellhead Valve, Manifold Block | Arctic oil and gas facilities, LNG terminals, LPG storage vessels, subsea pipelines |
| ASTM A694 F42 / F46 / F48 / F50 / F60 / F70 | High-Yield Pipeline Flange Steel | ASTM A694 Grade F42, F46, F48, F50, F52, F60, F65, F70 | EN 10222-4 High Yield | — | -30°C to 200°C | High-Pressure WNRF Flange, Anchor Flange, Swivel Ring Flange, Spectacle Blind | High-pressure cross-country gas pipelines, offshore export risers, manifold tie-ins |
| ASTM A516 Grade 60 / Grade 70 (SA516) | Pressure Vessel Carbon Steel | ASTM A516/A516M Gr 60, Gr 70 / ASME SA516 | 1.0425 / P265GH | UNS K02400 | -46°C to 400°C | Tubesheet Forging, Thick Ring, Vessel Flange, Blind Disc | Shell and tube heat exchangers, crude distillation drums, pressure storage vessels |
| ASTM A105 / SA105 / C22.8 | Standard Carbon Piping Forging | ASTM A105 / ASME SA105 / EN 10222-2 C22.8 | 1.0460 / C22.8 / P250GH | UNS K03504 | -29°C to 425°C | Weld Neck Flange, Slip-on Flange, Valve Body, Blind Disc, Heavy Ring | Petroleum refining, chemical process piping, steam distribution networks |
| WB36 / 15NiCuMoNb5-6-4 (1.6368) | Supercritical Feedwater Steel | ASTM A335 P36 / ASTM A182 F36 | 1.6368 / 15NiCuMoNb5-6-4 / WB36 | — | Up to 450°C | Forged Valve Body, Feedwater Pipe Fitting, Manifold Block, Header Forging | Supercritical and ultra-supercritical boiler high-pressure feedwater piping |
| AISI 4330V / 4330V Mod | V-Modified Ultra-High-Strength Steel | ASTM A29 / AMS 6427 / AMS 6411 | 1.6952 Mod | — | -40°C to 300°C | Frac Fluid End Block, Oilfield Mud Pump Cylinder, Aircraft Rotor Hub | Hydraulic fracturing fluid ends, heavy coiled tubing reels, motor casings |
| AISI 4145H / 4145H Mod | Oilfield Drill Collar Steel | ASTM A29 / API Spec 7-1 | 1.7225 Mod | — | -20°C to 200°C | Drill Collar Bar, Tool Joint Forging, Downhole Mandrel, Stabilizer Bar | Drill collars, subsea drilling subs, kelly bars, heavy cross-section shafts |
| AISI 9310 / 16CrNiMo12 (AMS 6265) | Aerospace Carburizing Gear Steel | AMS 6260 / AMS 6265 / AISI 9310 | 1.6745 / 16CrNiMo12 | UNS G93106 | -50°C to 250°C | Helicopter Gear Blank, Aircraft Transmission Shaft, Pinion Forging | Helicopter rotor transmission gears, aircraft engine reduction gearboxes |
| 100Cr6 / AISI 52100 (1.3505) | Bearing & Slewing-Ring Steel | ASTM A295 / AISI 52100 | 1.3505 / 100Cr6 | UNS G52986 | Up to 150°C (Standard) / 250°C (Heat-Stabilized) | Rolled Slewing Ring, Bearing Race Forging, Hollow Cylinder | Wind turbine pitch and yaw bearing rings, tunnel boring machine slewing rings, railway axle bearings |
| P235GH / P265GH / P355GH / P355NH / P460QH | EN 10028/10222 Pressure Vessel Series | EN 10222-2 / EN 10222-4 | 1.0345 (P235GH) / 1.0425 (P265GH) / 1.0473 (P355GH) / 1.8880 (P460QH) | — | -20°C to 450°C | Forged Flange, Pressure Ring, Boiler Tubesheet, Dished End Collar | European CE-PED pressure vessels, power plant boilers, steam conduits |
| S235JR / S275JR / S355J2 / S355NL / S460QL / S500QL | EN 10025 Structural & High-Yield Series | EN 10025-2 / EN 10025-3 / EN 10025-6 | 1.0577 (S355J2) / 1.0546 (S355NL) / 1.8931 (S460QL) | — | -50°C to 300°C | Heavy Structural Flange, Bridge Pin Forging, Crane Hook, Rotor Ring, Shaft | Offshore wind jackets, heavy mobile cranes, structural bridge bearings, heavy mining frames |

### Stainless & duplex

| Grade | Family | ASTM/ASME | EN / W.Nr. | UNS | Service temp. | Forms | Applications |
|---|---|---|---|---|---|---|---|
| A182-F6NM / 1.4313 (UNS S41500) | Hydro-Turbine Martensitic Stainless | ASTM A182 F6NM / UNS S41500 | 1.4313 / X3CrNiMo13-4 | UNS S41500 | -40°C to 400°C | Pelton Runner Forging, Francis Runner Crown, Hydro Valve Body, High-Pressure Pump Shaft | Hydroelectric turbine runners and blades, offshore injection pumps, compressor impellers |
| 17-4PH / AISI 630 (1.4542 / UNS S17400) | Precipitation Hardening Stainless | ASTM A564 / ASTM A705 Grade 630 / AMS 5643 | 1.4542 / X5CrNiCuNb16-4 | UNS S17400 | -30°C to 315°C | High-Strength Shaft, Forged Valve Stem, Aerospace Structural Forging, Rolled Ring | Pump shafts, valve trims, nuclear reactor control rod components, aerospace fasteners |
| 15-5PH / XM-12 (1.4545 / UNS S15500) | Ferrite-Free PH Stainless | ASTM A564 / ASTM A705 XM-12 / AMS 5659 | 1.4545 / X5CrNiCu15-5 | UNS S15500 | -30°C to 315°C | Aerospace Landing Gear Component, High-Pressure Manifold, Valve Body | Aircraft structural fittings, nuclear reactor components, centrifuge rotors |
| PH13-8Mo / XM-13 (1.4534 / UNS S13800) | Ultra-Tough PH Stainless | ASTM A564 / ASTM A705 XM-13 / AMS 5629 | 1.4534 / X3CrNiMoAl13-8-2 | UNS S13800 | -50°C to 350°C | Landing Gear Pin, High-Pressure Hydraulic Block, Shaft Forging | Military and commercial aircraft landing gears, launch vehicle pins, subsea wellhead manifolds |
| Custom 450 / Custom 455 / Custom 465 | Ultra-High-Strength PH Stainless | ASTM A564 / AMS 5763 / AMS 5936 | — | UNS S45000 / S45500 / S46500 | -40°C to 350°C | Precision Shaft, Forged Ring, Surgical / Actuator Component | Aerospace actuators, downhole drilling tools, medical instruments, high-strength pump shafts |
| SAF 2205 / A182-F51 (UNS S31803 / 1.4462) | 22% Cr Standard Duplex Stainless | ASTM A182 F51 / ASTM A276 / ASME SA182 F51 | 1.4462 / X2CrNiMoN22-5-3 | UNS S31803 / UNS S32205 (F60) | -50°C to 280°C | Forged Flange, Rolled Ring, Valve Body, Manifold Block, Shaft | Offshore oil & gas separation skids, sour crude processing, seawater desalination pumps |
| SAF 2507 / A182-F53 (UNS S32750 / 1.4410) | 25% Cr Super Duplex Stainless | ASTM A182 F53 / ASME SA182 F53 | 1.4410 / X2CrNiMoN25-7-4 | UNS S32750 | -50°C to 280°C | Subsea Manifold Block, Swivel Flange, High-Pressure Valve, Rolled Ring | Subsea Christmas trees, offshore seawater piping, sour gas pipelines, reverse osmosis vessels |
| Zeron 100 / A182-F55 (UNS S32760 / 1.4501) | W+Cu Super Duplex Stainless | ASTM A182 F55 / ASME SA182 F55 | 1.4501 / X2CrNiMoCuWN25-7-4 | UNS S32760 | -50°C to 300°C | Forged Valve, Pump Casing Ring, Flange, Centrifuge Disc | Flue gas desulfurization (FGD), phosphoric acid evaporator pumps, deepwater flowlines |
| 254SMO / A182-F44 (UNS S31254 / 1.4547) | 6% Mo Super Austenitic Stainless | ASTM A182 F44 / ASME SA182 F44 | 1.4547 / X1CrNiMoCuN20-18-7 | UNS S31254 | -196°C to 400°C | Forged Flange, Bleaching Washer Ring, Heat Exchanger Tubesheet, Shaft | Marine scrubber overboard spools, pulp bleach plant drums, offshore ballast systems |
| 654SMO / UNS S32654 (1.4652) | 7% Mo Super Austenitic Stainless | ASTM A182 / ASTM A240 UNS S32654 | 1.4652 / X1CrNiMoCuN24-22-8 | UNS S32654 | -196°C to 400°C | Autoclave Forging, Centrifuge Bowl Ring, Flange Forging | Plate heat exchangers in nuclear plants, bromine production reactors, aggressive hydrometallurgy |
| 904L / UNS N08904 (1.4539) | Sulfuric Acid Resistant Austenitic | ASTM A182 / ASTM B649 UNS N08904 | 1.4539 / X1NiCrMoCu25-20-5 | UNS N08904 | -196°C to 400°C | Forged Flange, Acid Pump Impeller, Tubesheet, Valve Body | Sulfuric acid cooling systems, phosphate fertilizer reactors, pickling bath rolls |
| Alloy 20 / Carpenter 20Cb-3 (UNS N08020) | Nb-Stabilized Sulfuric-Acid Alloy | ASTM B462 / ASTM B473 UNS N08020 | 2.4660 / NiCr20CuMo | UNS N08020 | -40°C to 500°C | Acid Valve Body, WNRF Flange, Agitator Shaft, Mixing Spool | Synthetic rubber manufacturing, sulfuric acid distribution manifolds, pickling tanks |
| Nitronic 50 / XM-19 (UNS S20910 / 1.3964) | Nitrogen-Strengthened High-Strength Austenitic | ASTM A182 / ASTM A276 / ASTM A479 XM-19 | 1.3964 / X2CrNiMnMoNNb21-16-5-3 | UNS S20910 | -196°C to 550°C | Marine Propeller Shaft, Non-Magnetic Drill Collar, Valve Stem, Pump Shaft | Naval submarine shafts, non-magnetic downhole MWD/LWD tools, high-pressure LNG valves |
| Nitronic 60 / UNS S21800 | Anti-Galling & Wear Resistant Alloy | ASTM A182 / ASTM A276 UNS S21800 | — | UNS S21800 | -40°C to 980°C | Valve Trim Ring, Bushing Forging, Wear Ring, Stem Forging | Gate valve seats, pump wear rings, industrial roller chains, precision pins |
| A-286 / GH2132 (UNS S66286 / 1.4980) | High-Temperature Austenitic Fastener Steel | ASTM A453 Grade 660 Class A/B / AMS 5731 | 1.4980 / X6NiCrTiMoVB25-15-2 | UNS S66286 | -196°C to 700°C | Turbine Rotor Disc, High-Temp Stud & Bolt Forging, Exhaust Manifold Ring | Jet engine turbine casings, turbocharger fasteners, rocket engine nozzle flanges |
| ASTM A182 Grade F316L / F316H / F316Ti (1.4404 / 1.4571) | Moly-Bearing Austenitic Stainless | ASTM A182 F316L / ASME SA182 F316L / F316Ti | 1.4404 (316L) / 1.4571 (316Ti) | UNS S31603 / UNS S31635 | -196°C to 650°C | Forged Flange, Valve Block, Tubesheet, Shaft, Rolled Ring | Chemical processing equipment, pharmaceutical autoclaves, food & dairy machinery |
| 316L Mod / 1.4435 / 724L (Urea Grade) | High-Purity Urea Plant Grade | ASTM A182 F316L Mod / ISO 7153-1 | 1.4435 / X2CrNiMo18-14-3 (Urea Grade) | UNS S31603 Mod | -196°C to 300°C | High-Pressure Stripper Flange, Condenser Tubesheet, Valve Body | High-pressure urea synthesis reactors, carbamate strippers, high-purity nitric acid tanks |
| ASTM A182 Grade F304 / F304L / F304H | 18-8 Classical Austenitic Stainless | ASTM A182 F304L / ASME SA182 F304 / F304H | 1.4301 / 1.4306 (304L) / 1.4307 | UNS S30400 / UNS S30403 | -196°C to 800°C | Forged Flange, Nozzle, Rings, Bars, Discs | Cryogenic piping, food and dairy storage, municipal water treatment, general petrochemical |
| AISI 321 / 321H / F321 (1.4541 / UNS S32100) | Titanium-Stabilized Austenitic Stainless | ASTM A182 F321 / ASME SA182 F321 / F321H | 1.4541 / X6CrNiTi18-10 | UNS S32100 | 425°C to 900°C | Aircraft Exhaust Manifold Forging, Expansion Joint Flange, Furnace Header | Aerospace engine exhaust collectors, petrochemical cracking furnace tubes, diesel exhaust manifolds |
| AISI 347 / 347H / F347 (1.4550 / UNS S34700) | Niobium-Stabilized High-Temp Stainless | ASTM A182 F347 / ASME SA182 F347 / F347H | 1.4550 / X6CrNiNb18-10 | UNS S34700 | Up to 850°C | Refinery Hydrotreater Flange, Reactor Nozzle, Boiler Tubesheet | Refinery desulfurizers, catalytic cracking units, nuclear steam superheater tubes |
| AISI 310S / F310 (1.4845 / 25-20 / SAF 2520) | 25Cr-20Ni High-Temperature Furnace Steel | ASTM A182 F310 / ASTM A276 / ASME SA182 F310S | 1.4845 / X8CrNi25-21 | UNS S31008 | Up to 1150°C | Furnace Roller Forging, Radiant Tube Ring, Kiln Flange, Burner Nozzle | Heat treatment furnace fixtures, cement kiln burning rings, fluidized bed combustor components |
| AISI 440C (1.4125 / UNS S44004) | High-Carbon Martensitic Stainless | ASTM A276 / AISI 440C / AMS 5630 | 1.4125 / X105CrMo17 | UNS S44004 | Up to 150°C | Valve Ball Forging, Bearing Race, Nozzle Ring, Knife Edge Block | Corrosion-resistant ball bearings, offshore choke valves, surgical shears, pump seats |
| FV520B / 1.4594 | Centrifuge & Impeller PH Stainless | Firth Vickers FV520B / BS S143 / BS S144 | 1.4594 / X5CrNiMoCuNb14-5 | — | -70°C to 450°C | High-Speed Centrifuge Rotor, Compressor Impeller, Marine Propeller Shaft | Decanter centrifuges, industrial fans, sour gas compressors, maritime propulsion |
| AERMET 100 ALLOY (UNS K92580) | Ultra-High Fracture Toughness Alloy | AMS 6532 / UNS K92580 | — | — | -50°C to 400°C | Aircraft Arresting Hook Shank, Drive Shaft, High-Stress Armor Pin | Carrier aircraft landing gear arrestor hooks, jet engine drive shafts, high-strength structural parts |

### Nickel alloys

| Grade | Family | ASTM/ASME | EN / W.Nr. | UNS | Service temp. | Forms | Applications |
|---|---|---|---|---|---|---|---|
| Inconel 718 (GH4169 / UNS N07718) | Precipitation-Hardened Superalloy | ASTM B637 / AMS 5662 / AMS 5663 | 2.4668 / NiCr19Fe19Nb5Mo3 | UNS N07718 | -250°C to 650°C | Aerospace Turbine Disc, Subsea Wellhead Ring, High-Strength Shaft, Valve Body, Rolled Ring | Aero-engine turbine discs & casings; Nuclear fuel spacer grids; Subsea 15,000+ psi Christmas-tree valves; Cryogenic liquid rocket pumps |
| Inconel 625 (GH3625 / UNS N06625) | Solid-Solution Corrosion Superalloy | ASTM B446 / ASTM B564 / AMS 5666 | 2.4856 / NiCr22Mo9Nb | UNS N06625 | -196°C to 980°C | Forged Valve Body, Subsea Flange, Exhaust Ducts, Bellows Ring, Round Bar | Subsea mooring shackles; Sour gas production liners; Marine exhaust systems; Chemical reaction vessels |
| Hastelloy C-276 (UNS N10276 / 2.4819) | Universal Severe Chemical Alloy | ASTM B574 / ASTM B564 / ASME SB-564 | 2.4819 / NiMo16Cr15W | UNS N10276 | -196°C to 1040°C | Chemical Reactor Forging, Flange, Pump Shaft, Valve Trim, Round Bar | Flue gas desulfurization (FGD) scrubbers; Pharmaceutical synthesis autoclaves; Sour gas downhole valves; Waste incineration scrubbers |
| Hastelloy C-22 (UNS N06022 / 2.4602) | Cr-Enriched High-Oxidation Alloy | ASTM B564 / ASTM B574 UNS N06022 | 2.4602 / NiCr21Mo14W | UNS N06022 | -196°C to 1000°C | Forged Flange, Reactor Body, Agitator Shaft, Tubesheet | Chlorination systems, pesticide synthesis, nuclear fuel reprocessing |
| Hastelloy B-2 / B-3 (UNS N10665 / N10675) | Pure Hydrochloric Acid Alloy | ASTM B564 / ASTM B335 UNS N10665 / N10675 | 2.4617 (B-2) / 2.4600 (B-3) | UNS N10665 / UNS N10675 | Ambient to 400°C | HCl Valve Forging, Alkylating Pump Shaft, Heavy Ring | Acetic acid manufacturing, ethylbenzene production, hydrochloric acid recovery |
| Monel 400 (UNS N04400 / 2.4360) | Nickel-Copper Seawater Alloy | ASTM B164 / ASTM B564 / ASME SB-564 | 2.4360 / NiCu30Fe | UNS N04400 | -196°C to 480°C | Marine Propeller Shaft, Subsea Valve Flange, Brine Pump Rotor, Forged Ring | Marine propeller shafts; HF acid alkylation units; Desalination plant impellers; Crude oil distillation towers |
| Monel K-500 (UNS N05500 / 2.4375) | Age-Hardenable High-Strength Monel | ASTM B865 / QQ-N-286 | 2.4375 / NiCu30Al | UNS N05500 | -196°C to 450°C | High-Strength Marine Shaft, Drill Collar Sub, Pump Impeller Ring, Fastener Bar | Non-magnetic drill collars, naval submarine propulsion shafts, pump valve stems, oilfield safety valves |
| Incoloy 800H / 800HT (UNS N08810 / N08811) | Creep-Resistant Iron-Nickel-Chromium | ASTM B408 / ASTM B564 / ASME SB-564 | 1.4876 / X10NiCrAlTi32-20 | UNS N08810 / UNS N08811 | Up to 1000°C | Pyrolysis Pigtail Ring, Reformer Tubesheet, Flange Forging, Shaft | Ethylene pyrolysis furnaces, steam/hydrocarbon reformers, high-temperature heat exchangers |
| Incoloy 825 (UNS N08825 / 2.4858) | Acid-Resistant Iron-Nickel-Chromium | ASTM B425 / ASTM B564 / ASME SB-564 | 2.4858 / NiCr21Mo | UNS N08825 | -196°C to 540°C | Chemical Valve Body, Offshore Piping Flange, Downhole Casing Forging, Tubesheet | Phosphoric acid evaporators, sulfuric acid pickling hooks, sour gas downhole tubing hangers |
| Inconel 600 (GH3600 / UNS N06600) | High-Temperature Oxidation & Caustic Alloy | ASTM B166 / ASTM B564 / AMS 5665 | 2.4816 / NiCr15Fe | UNS N06600 | -196°C to 1175°C | Furnace Retort Ring, Nuclear Steam Flange, Shaft Forging, Rolled Ring | Heat treating retorts, nuclear steam generator components, chemical chlorination reactors |
| Inconel X-750 (GH4145 / UNS N07750) | Spring & Fastener Age-Hardened Alloy | ASTM B637 / AMS 5667 / AMS 5671 | 2.4669 / NiCr15Fe7TiAl | UNS N07750 | -250°C to 700°C | Nuclear Spring Bar, Turbine Rotor Ring, Bolting Forging, Valve Stem | Gas turbine rotor blades, nuclear reactor spring hold-downs, rocket engine thrust chambers |
| Inconel 725 (UNS N07725) | High-Strength Deepwater Wellhead Alloy | ASTM B805 / API 6ACRA | — | UNS N07725 | -100°C to 500°C | Deepwater Wellhead Forging, Subsea Valve Stem, Hanger Body | Subsea HPHT oil & gas wells, sour gas valves, high-strength marine fasteners |
| Invar 36 (4J36 / UNS K93600) | Low Thermal Expansion Invar | ASTM F1684 / AMS I-23011 | 1.3912 / FeNi36 | UNS K93600 | -100°C to 200°C | Aerospace Composite Tooling Mold, LNG Tank Membrane Ring, Laser Optic Ring | Composite cure tooling for carbon fiber aircraft wings, LNG carrier structural supports, cryogenic storage |

### High-temp aerospace

| Grade | Family | ASTM/ASME | EN / W.Nr. | UNS | Service temp. | Forms | Applications |
|---|---|---|---|---|---|---|---|
| Nimonic 80A / GH4080A (UNS N07080) | Exhaust Valve & Gas Turbine Superalloy | ASTM B637 / BS HR1 / AMS 5747 | 2.4952 / NiCr20TiAl | UNS N07080 | Up to 815°C | Marine Diesel Exhaust Valve Head, Gas Turbine Spindle Ring, Turbine Disc | Heavy marine 2-stroke engine exhaust valves, gas turbine blading, nuclear boiler tube supports |
| Waspaloy (UNS N07001 / 2.4654) | Jet Engine High-Temperature Disc Alloy | ASTM B637 / AMS 5706 / AMS 5707 | 2.4654 / NiCr19Co14Mo4Ti | UNS N07001 | Up to 870°C | Turbine Rotor Disc, Compressor Spacers, Rings, High-Temp Fasteners | Jet engine turbine rotors, high-temperature gas turbine shafts, aerospace rocket engine rings |
| Haynes 25 / L-605 (UNS R30605 / 2.4964) | Cobalt-Based High-Temperature Alloy | ASTM F90 / AMS 5759 / AMS 5537 | 2.4964 / CoCr20W15Ni | UNS R30605 | Up to 980°C | Combustor Ring, Turbine Shroud Forging, Wear Guide Ring | Gas turbine combustion chambers, aircraft afterburners, industrial high-temperature springs |
| MP35N (UNS R30035 / AMS 5844) | Ultra-High-Strength Co-Ni Alloy | ASTM F562 / AMS 5844 / AMS 5845 | 2.4999 | UNS R30035 | -200°C to 450°C | High-Strength Shaft, Subsea Actuator Ring, Fastener Bar | Deepwater subsea valves, medical orthopedic implants, aerospace control actuators |

## Corrosion suitability (Good / Usable / Avoid)

| Alloy | Sulfuric acid | Hydrochloric acid | Hydrofluoric acid | Phosphoric acid | Nitric acid | Organic acids | Alkalis & salts | Seawater |
|---|---|---|---|---|---|---|---|---|
| SAF 2205 / A182-F51 (UNS S31803 / 1.4462) | Usable | Avoid | Avoid | Good | Good | Good | Good | Good |
| SAF 2507 / A182-F53 (UNS S32750 / 1.4410) | Usable | Usable | Avoid | Good | Good | Good | Good | Good |
| Zeron 100 / A182-F55 (UNS S32760 / 1.4501) | Good | Usable | Avoid | Good | Good | Good | Good | Good |
| 254SMO / A182-F44 (UNS S31254 / 1.4547) | Good | Usable | Avoid | Good | Good | Good | Good | Good |
| 904L / UNS N08904 (1.4539) | Good | Usable | Avoid | Good | Good | Good | Good | Good |
| ASTM A182 Grade F316L / F316H / F316Ti (1.4404 / 1.4571) | Usable | Avoid | Avoid | Usable | Good | Good | Good | Usable |
| Inconel 718 (GH4169 / UNS N07718) | Good | Usable | Good | Good | Good | Good | Good | Good |
| Inconel 625 (GH3625 / UNS N06625) | Good | Good | Good | Good | Good | Good | Good | Good |
| Hastelloy C-276 (UNS N10276 / 2.4819) | Good | Good | Good | Good | Usable | Good | Good | Good |
| Hastelloy C-22 (UNS N06022 / 2.4602) | Good | Good | Good | Good | Good | Good | Good | Good |
| Hastelloy B-2 / B-3 (UNS N10665 / N10675) | Good | Good | Good | Good | Avoid | Good | Good | Usable |
| Monel 400 (UNS N04400 / 2.4360) | Good | Good | Good | Good | Avoid | Good | Good | Good |
| Monel K-500 (UNS N05500 / 2.4375) | Good | Good | Good | Good | Avoid | Good | Good | Good |
| Incoloy 800H / 800HT (UNS N08810 / N08811) | Usable | Avoid | Avoid | Good | Good | Good | Good | Usable |
| Incoloy 825 (UNS N08825 / 2.4858) | Good | Usable | Usable | Good | Good | Good | Good | Good |
| Inconel 600 (GH3600 / UNS N06600) | Usable | Usable | Usable | Good | Usable | Good | Good | Good |

## Main equipment

- **6300 t Hydraulic Open-Die Forging Press** — Single forgings up to 35 t. Daylight 4,200 mm · column spacing 4,000 mm · forging tolerance ±1.5 mm. Flagship press with rail-bound manipulator for heavy turbine shafts, large rings, pressure-vessel shells and die blocks.
- **4000 t Hydraulic Forging Press** — Up to 50,000 t of forgings per year. Computer-controlled stroke and deformation; closed-loop manipulator. Controlled reductions consolidate internal porosity and refine grain in alloy steels and superalloys.
- **2000 t Fast Forging Press** — Radial and axial drawing of bars. Up to 120 strokes/min for uniform core consolidation. High-frequency cogging of difficult-to-forge nickel alloys, titanium alloys and tool steels.
- **Electro-Hydraulic Hammers (0.75–5 t)** — Small and medium forgings, flanges and discs. 0.75 t, 1 t, 3 t and 5 t hammers with controlled blow energy. Short-run valve bodies, blind flanges, shaped discs and prototype parts with fast turnaround.
- **Electric Arc Furnaces, 2 × 30 t (EAF)** — 150,000 t of liquid steel per year. Oxygen lancing, water-cooled roof, scrap preheating. Primary melting with accurate carbon and temperature control ahead of secondary refining.
- **30 t Ladle Furnace (LF) and 30 t VOD** — Degassing and ultra-low C/S refining. Vacuum < 67 Pa · S ≤ 0.005% · C ≤ 0.015%. Secondary refining removes hydrogen, nitrogen and oxygen to produce clean alloy-steel ingots.
- **3 t Vacuum Induction Melting Furnace (VIM)** — Primary melting of nickel and cobalt alloys. Vacuum to 10⁻³ mbar · inert-gas stirring · precise alloy additions. Prevents loss and oxidation of reactive elements (Ti, Al, B, Zr); produces electrodes for VAR and ESR.
- **6 t Vacuum Arc Remelting Furnace (VAR)** — Remelting of Alloy 718, Alloy 625 and rotor steels. Coaxial power feed · computer-controlled melt rate. Produces sound ingots with fine structure and minimal segregation or freckles for rotating parts.
- **6 t Protective-Atmosphere ESR (IGESR) and 3 t ESR** — ESR ingots up to 1,000 mm diameter. Argon shroud · slag refining of non-metallic inclusions. Protects Al and Ti in superalloys and gives directional solidification without shrinkage cavities.
- **Heavy CNC Lathes and Gantry Mills** — Turning to 2,500 mm diameter and 12,000 mm length. 30+ CNC machines · surface finish to Ra 0.8 µm. Forgings supplied as-forged, rough-machined or finish-machined to drawing.
- **Chemical, Mechanical and NDT Laboratory** — Full in-house testing before release. Procedures aligned with ISO/IEC 17025 · EN 10204 3.1 certificates. Room- and elevated-temperature tensile, Charpy V-notch to −196 °C, ultrasonic testing and inclusion rating.

## FAQ

### What does Jiangsu Hearthvane Forging Co Ltd manufacture?
Hearthvane manufactures open-die forgings, seamless rolled rings, forged shafts, discs, blocks and bars in alloy steel, carbon steel, stainless and duplex steel, and nickel-based superalloys. The plant covers melting (30 t EAF/LF/VOD), vacuum and electroslag remelting (3 t VIM, 6 t VAR, 6 t IGESR, 3 t ESR), forging on 6300 t and 4000 t hydraulic presses, heat treatment, CNC machining and laboratory testing on one 80,000 m² site in Changzhou, Jiangsu, China.

### What is the largest forging Hearthvane can produce?
Single forgings up to 35 metric tons. Typical maximum dimensions are rolled seamless rings up to 5,000 mm outside diameter, shafts up to 12,000 mm long, discs up to 3,500 mm diameter and die blocks up to 2,000 mm cross-section. CNC turning covers diameters up to 2,500 mm and lengths up to 12,000 mm.

### What is the annual production capacity?
About 150,000 t of ingots and 120,000 t of forgings per year, including 3,000–10,000 t per year of high-end nickel-based alloys from the special-materials division.

### Which steel and alloy grades are available?
We supply more than 200 standard grades in four families: alloy and carbon steels (42CrMo4/4140, 34CrNiMo6/4340, 18CrNiMo7-6, A182/SA336 F11, F22, F22V, F91, F92, SA508 Gr.3/4, SA350 LF2/LF3, A694 F42–F70, WB36); stainless and duplex steels (F6NM, 17-4PH, 15-5PH, 13-8Mo, SAF 2205, SAF 2507, Zeron 100, 254SMO, 904L, Nitronic 50/60, A-286); nickel alloys (Inconel 600, 625, 718, X-750, 725; Hastelloy C-276, C-22, B-2/B-3; Monel 400, K-500; Incoloy 800H/HT, 825; Invar 36); and high-temperature aerospace alloys (Nimonic 80A, Waspaloy, Haynes 25/L-605, MP35N).

### How is Inconel 718 melted for aerospace and subsea forgings?
Inconel 718 (UNS N07718 / GH4169 / 2.4668) is produced by vacuum induction melting (VIM) followed by vacuum arc remelting (VAR), a double-vacuum route that limits loss of Ti, Al and Nb and reduces macro-segregation and freckles before forging into discs, rings and wellhead components.

### Which alloys resist hydrochloric acid?
In our corrosion reference data, Hastelloy C-276, Hastelloy C-22, Hastelloy B-2/B-3, Inconel 625, Monel 400 and Monel K-500 are rated good in hydrochloric acid. Standard duplex 2205 and 316L are rated not recommended. Final selection should take concentration, temperature and contaminants into account.

### Which certifications and classification approvals does Hearthvane hold?
ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 management systems, works approval from China Classification Society (CCS), and approvals from DNV, ABS, Lloyd’s Register (LR) and Bureau Veritas (BV). Hearthvane runs the Jiangsu Provincial Heavy Forging Engineering Technology R&D Center and cooperates with Tsinghua University and Northeastern University.

### What inspection documents are supplied with each order?
Every shipment is supplied with an EN 10204 3.1 material test report covering chemical analysis, mechanical properties and heat-treatment records, backed by 100% volumetric ultrasonic testing and full heat-number traceability. Classification-society witnessed certificates (CCS, DNV, ABS, LR, BV) are available on request.

### How do I request a quotation?
Send the grade, product form, dimensions, quantity, applicable standard and inspection requirements with your drawings (PDF, DWG or STEP) to sales@forgingmaterial.com, by WhatsApp to 0086-19941580013, or through the RFQ form on this page. Our engineering team will respond with a technical review and quotation within 24 hours.

### Where is the Hearthvane forging plant located?
Jiangsu Hearthvane Forging Co Ltd is located in Xueyan Town Industrial Concentration Zone, Wujin District, Changzhou City, Jiangsu Province, China.