1.7380 10CrMo9-10 ASTM A182 F22 Alloy Steel for High Temperature Service

Product Overview: 1.7380 / 10CrMo9-10 / ASTM A182 F22 Alloy Steel

The 1.7380 / 10CrMo9-10 / ASTM A182 F22 is a premium 2.25Cr-1Mo low-alloy heat-resistant steel, highly regarded for its exceptional performance in elevated temperature environments. Nominally containing 2.25% Chromium and 1% Molybdenum, this alloy delivers outstanding creep rupture strength, excellent resistance to hydrogen attack, and reliable structural stability at temperatures up to 600℃ (1112℉).

While sometimes miscategorised in general procurement as a stainless grade due to its corrosion-resistant properties in specific chemical environments, it is fundamentally a high-strength low-alloy (HSLA) pressure vessel and valve steel. At FUSHUN METAL, we specialise in manufacturing high-integrity F22 forgings and rolled products engineered for critical applications. The material exhibits excellent hardenability and weldability, making it the preferred choice for severe service conditions in the petrochemical, power generation, and oil & gas industries. Furthermore, when heat-treated to specific parameters, its hardness levels (up to 22 HRC) fully comply with NACE MR0175 requirements for sour service environments.

Equivalent Grades — Cross Reference

Typical Applications

Due to its high-temperature strength, creep resistance, and resistance to hydrogen attack, 1.7380 / F22 is utilised in highly demanding industrial components across several critical industries:

• Oil & Gas Wellhead Equipment: Connectors, casing hangers, tubing hangers, and high-pressure block valves operating in sour or high-pressure environments.
• Pressure Vessels & Heat Exchangers: Flanges, tube sheets, forged shells, and heavy-wall seamless fittings for refinery and processing service.
• Power Generation: Steam turbine casings, high-temperature steam piping systems, and boiler headers where long-term creep strength is essential.
• Petrochemical Processing: Base metal for clad components (weld overlay applications), hydrocracker components, and catalytic reformer parts operating in hydrogen-rich atmospheres.

Applicable Specifications & Standards

FUSHUN METAL supplies this grade in strict accordance with the following internationally recognised standards:

ASTM A182 / ASME SA182

Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service.

ASTM A336 / ASME SA336

Alloy Steel Forgings for Pressure and High-Temperature Parts.

EN 10222-2

Steel Forgings for Pressure Purposes — Ferritic and Martensitic steels with specified elevated temperature properties.

EN 10028-2

Flat Products Made of Steels for Pressure Purposes (Weldable fine grain steels, thermomechanically rolled).

DIN 17155

Boiler Plates and Pressure Vessel Steels — historical DIN standard frequently referenced in legacy engineering documents.

Available Sizes & Delivery

FUSHUN METAL operates advanced production facilities, including a 6,000-ton hydraulic forging press and a state-of-the-art GFM radial forging machine, offering an exceptionally wide dimensional range with superior internal soundness verified by 100% ultrasonic inspection.

Available Forms & Size Range

Delivery Conditions & Minimum Order Quantity

Chemical Composition

The chemical composition is strictly controlled to ensure optimal high-temperature performance. The table below provides a direct comparison of requirements between ASTM A182 F22 and EN 10CrMo9-10 (1.7380).

Composition Customisation: FUSHUN METAL can tightly restrict elements such as P, S, and Cu beyond standard limits to meet critical sour service (NACE) or bespoke customer requirements upon request.

Melting & Processing Routes

To guarantee the highest metallurgical purity and mechanical integrity, FUSHUN METAL offers flexible, tiered melting routes tailored to your project's criticality and budget. Tell us your requirements and our metallurgical engineers will recommend the most cost-effective, technically sound smelting option.

Small-batch special smelting is available from 3–5 tons using our precision induction furnaces. Large-volume orders are processed through our 30–60 ton Electric Arc Furnaces (EAF) for rapid, large-scale production and deployment.

Mechanical Properties

The mechanical properties of 1.7380 / F22 depend heavily on the heat treatment condition. The data below represents typical standard requirements at room temperature (20℃).

NACE MR0175 Compliance: Hardness can be strictly controlled to ≤ 22 HRC (approx. 237 HB) to comply with NACE MR0175 / ISO 15156 for sour gas service environments. This applies to both Q+T and N+T conditions.

Heat Treatment

Proper heat treatment is critical for 1.7380 / F22 to develop its high-temperature creep resistance, toughness, and dimensional stability. All heat treatment procedures are rigorously controlled by calibrated furnaces and fully documented in the mill test certificate.

Surface Finish & Machining

FUSHUN METAL provides a comprehensive range of surface conditions to match your subsequent manufacturing steps. Our in-house machining centre enables us to go far beyond raw material supply, delivering components ready for direct assembly or final inspection.

• Black Forged / Rolled Surface: Standard as-forged or as-rolled surface finish for immediate downstream processing or rough machining.
• Peeled / Turned Surface: For round bars, surface roughness Ra 3.2–6.3 µm with tight dimensional tolerances (h9 to h11), suitable for most machining operations.
• Centreless Ground (Bright Finish): High-precision surface at Ra 0.8–1.6 µm for precision fitting, bearing seat, and sliding contact applications.
• Milled Flat / Block Surface: Excellent flatness and parallelism guaranteed, ready for direct clamping and machining without preliminary dressing.
• CNC Machined Semi-Finished or Finished Components: Supplied directly to your CAD drawings — saving significant processing time, tooling costs, and supply chain complexity.

Quality Assurance & Inspection

Quality is the cornerstone of FUSHUN METAL. Our facilities are fully certified to ISO 9001 and AS9100, ensuring aerospace-grade quality management is applied across all industrial orders, regardless of volume.

• Non-Destructive Testing (NDT)

  100% Ultrasonic Testing (UT) performed on all forgings in accordance with SEP 1921 Class C/c or D/d, and EN 10228-3, ensuring zero internal defects before dispatch.

• In-House Laboratory Testing

  Precise chemical analysis (OES), room and elevated temperature tensile testing, Charpy V-notch impact testing (including sub-zero grades), and full metallographic examination for grain size and non-metallic inclusions.

• Mill Test Certificate (MTC)

  All shipments are accompanied by an EN 10204 3.1 MTC as standard. EN 10204 3.2 certification — witnessed by an independent third-party inspector — is fully supported upon project requirement.

• Third-Party Inspection

  FUSHUN METAL regularly coordinates with SGS, TUV, DNV, and Lloyd's Register for independent verification. Clients are welcome to appoint their own TPI at any stage of production and testing.

Packing & Shipping

We understand that industrial steel must cross oceans and continents while maintaining its integrity. Our packaging solutions are engineered to ensure every shipment arrives rust-free and in pristine condition, regardless of journey length or climate zone.

• Black Surface Materials: Securely bundled with heavy-duty steel wire and reinforced end caps to prevent shifting and damage inside shipping containers during sea or rail transit.
• Bright / Turned / Ground Surfaces: Premium anti-rust oil coating applied and wrapped in multi-layer protective materials, including nylon film, canvas, or VCI (Volatile Corrosion Inhibitor) paper for long-term corrosion protection.
• Precision CNC Machined Parts: Individually packed in custom-built fumigation-free wooden crates to fully protect surface roughness, dimensional accuracy, and critical features.
• Shipping Terms: Sea freight (FOB / CIF / DDP), railway freight, or air freight — we accommodate your preferred Incoterm and logistics partner without exception.

Frequently Asked Questions

• Q Can you cut 1.7380 / F22 steel to my specific length?

  Yes. FUSHUN METAL is equipped with high-capacity band saws capable of cutting round bars, flat bars, and blocks to your exact required lengths or piece weights. This allows you to feed the material directly into your CNC machines without any preliminary cutting operations on-site.

• Q What is the hardness of F22 in the annealed condition?

  When supplied in the fully annealed or slow-cooled condition, the hardness of 1.7380 / F22 is typically restricted to a maximum of 170 HB. This soft delivery state is ideal for extensive cold working, heavy machining operations, or component forming prior to final heat treatment by the end user.

• Q Is ASTM A182 F22 considered a stainless steel?

  Although sometimes loosely referred to as “stainless” in certain legacy procurement systems due to its corrosion resistance compared to plain carbon steel, F22 is technically a low-alloy Cr-Mo steel. Its 2.25% Chromium content provides excellent oxidation resistance at high temperatures, but it does not meet the >10.5% Chromium threshold required to be classified as a true stainless steel. Specifying it as stainless in engineering documents would be technically incorrect.

• Q Can FUSHUN METAL guarantee NACE MR0175 compliance for F22 forgings?

  Absolutely. By carefully controlling the chemical composition — especially restricting Sulfur and Phosphorus to well below standard limits — and applying a precise Quench and Temper (Q+T) or Normalize and Temper (N+T) heat treatment cycle, we ensure the final hardness remains strictly below 22 HRC, fully complying with NACE MR0175 / ISO 15156 for sour gas applications. Compliance is documented in the EN 10204 3.1 MTC accompanying every shipment.