What is ASTM A182 F44 Material Equivalent?
The material equivalent to ASTM A182 F44 is typically known as UNS S31254 or ASTM A182 Grade F44. UNS S31254 is a super austenitic stainless steel, also sometimes referred to as 6% Moly, due to its high molybdenum content. This material offers excellent resistance to corrosion in various aggressive environments, including chloride-containing media such as seawater and brine solutions.
ASTM A182 Grade F44 (UNS S31254) finds extensive use in industries such as chemical processing, oil and gas, pulp and paper, and marine applications. Its superior corrosion resistance, high strength, and excellent weldability make it suitable for a wide range of applications, including valves, fittings, flanges, and piping systems operating in demanding environments.
| Standard / System | Designation / Equivalent Grade |
| UNS Designation | UNS S31254 |
| Proprietary Name | 254 SMO® / 6% Moly (6MO) |
| EN / DIN Standard | EN 1.4547 / X1CrNiMoCuN20-18-7 |
| AFNOR (France) | Z1 CNDU 20.18.06AZ |
| BS (UK) | 254 S 31 |
| SS (Sweden) | SS 2378 |
ASTM A182 F44 Chemical Composition Requirements (%)
The superior corrosion resistance of ASTM A182 F44 is driven by its high molybdenum, nitrogen, and chromium formulation:
| Element | Min (%) | Max (%) |
| Carbon (C) | - | 0.020 |
| Manganese (Mn) | - | 1.00 |
| Phosphorus (P) | - | 0.030 |
| Sulfur (S) | - | 0.010 |
| Silicon (Si) | - | 0.80 |
| Chromium (Cr) | 19.50 | 20.50 |
| Nickel (Ni) | 17.50 | 19.50 |
| Molybdenum (Mo) | 6.00 | 6.50 |
| Copper (Cu) | 0.50 | 1.00 |
| Nitrogen (N) | 0.18 | 0.25 |
Mechanical Requirements (ASTM A182 Specification)
| Property | Minimum Value |
| Tensile Strength, min | 650 MPa (94 ksi) |
| Yield Strength (0.2% Offset), min | 300 MPa (44 ksi) |
| Elongation in 2 in. (50 mm), min | 35% |
| Reduction of Area, min | 50% |
| Hardness (Brinell, HBW) | 220 max |
Key Applications & Industry Uses
Due to its ability to withstand severe chemical and marine environments, ASTM A182 F44 / UNS S31254 forged components are deployed across high-integrity industries:
Offshore Oil & Gas: Subsea piping systems, manifold valves, riser components, and firewater systems.
Desalination Plants: Reverse osmosis (RO) high-pressure piping, pumps, and flange connections.
Chemical Processing: Equipment producing bleach, organic acids, and chloride-containing chemicals.
Pulp & Paper: Bleach plant washers, drums, press rolls, and piping.
Flue Gas Desulfurization (FGD): Scrubber systems operating under acid-condensate conditions.
ASTM A182 F44 Product Supply Capability
As a specialized supplier and exporter of high-performance piping solutions, Zhengzhou Huitong Pipeline Equipment Co., Ltd. manufactures and supplies a comprehensive range of ASTM A182 F44 and UNS S31254 forged and fabricated products:
A182 F44 Flanges: Weld Neck (WN), Slip-On (SO), Blind (BL), Socket Weld (SW), Threaded, and Spectacle Blinds (ASME B16.5 / B16.47 Series A & B, Class 150# to 2500#).
Pipe Fittings: ASTM A403 WP31254 Elbows, Tees, Reducers, Caps, and Forged Fittings (ASME B16.11 3000#/6000#).
Pipes & Tubes: ASTM A312 / A269 UNS S31254 Seamless and Welded Pipes (254 SMO).
Plates & Bars: ASTM A240 UNS S31254 Sheets/Plates and ASTM A479 UNS S31254 Round Bars.
Quality Assurance & Certification
All ASTM A182 F44 products are delivered with full traceability and strict quality verification:
EN 10204 3.1 Mill Test Certificates (MTC) provided with every shipment.
Third-Party Inspection (TPI): SGS, BV, TUV, or Lloyd's inspection available upon request.
Testing Scope: PMI (Positive Material Identification), NDT (UT, PT), Microstructure inspection, and Corrosion Testing according to ASTM G48.
Need a Fast Quote for ASTM A182 F44 Flanges or Pipes?
Whether you require standard ANSI B16.5 F44 flanges or custom-machined 254 SMO forged components, our engineering team is ready to support your project requirements.
Email Direct Inquiry: market@htpipe.com
Phone / WhatsApp: +86-19339900201
Service: Free Technical Consultation & Rapid Quotation within 24 hours.
