S31254 / 1.4547 Stainless Steel Welded Pipe Supplier in China
Discover our S31254 / 1.4547 welded pipes, a premier super-austenitic stainless steel engineered for extreme environments. Offering exceptional resistance to pitting and crevice corrosion in chloride-rich media, these high-strength pipes ensure superior reliability for demanding chemical, marine, and desalination applications.
S31254 / 1.4547 Welded Pipe - Detailed Specifications
| Specification Parameter | Details |
|---|---|
| International Grades | UNS: S31254, EN: 1.4547, Common Name: 6Mo Stainless Steel |
| Pipe Manufacturing Standard | ASTM A312, ASTM A358, ASME SA312 |
| Raw Material Specification | ASTM A240 / ASME SA-240 |
| Outer Diameter (OD) | 1/2 NPS to 36" NPS (21.3mm to 914.4mm)" |
| Wall Thickness (WT) | Schedule 10S, 20, 40S, 80S, XS (2.11mm to 50mm) |
| Length | Up to 12 meters (40 ft), or custom-cut lengths |
| Welding Method | EFW (Electric Fusion Welded), ERW (Electric Resistance Welded) |
| Pipe Ends | Plain End (PE), Beveled End (BE) |
| Key Features | Exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride environments. High strength. |
| Testing & Inspection | Hydrostatic Test, NDT (Radiography, Ultrasonic), PMI (Positive Material Identification), Chemical Analysis, Mechanical Testing (Tensile, Bend) |
| Surface Finish | Annealed and Pickled (No. 1 Finish), Bright Annealed, Polished Finishes available |
Understanding ASTM A240 / ASME SA-240
What It Is:
ASTM A240 / ASME SA-240 is the cornerstone specification for the stainless steel plate used to manufacture high-performance welded pipes.
The Blueprint for Raw Material: This standard defines the mandatory chemical composition, mechanical properties (strength, ductility), and heat treatment requirements for stainless steel plate, sheet, and strip.
Includes High-Performance Grades: It specifically covers super-austenitic grades like S31254 (1.4547), ensuring its unique properties are precisely controlled from the mill.
Foundation of Quality: Our S31254 welded pipes are fabricated from plate that strictly conforms to this standard, establishing quality at the source.
Why It Is Your Core Focus:
Our strict adherence to this standard is not just about compliance; it’s our promise of delivering unparalleled safety and performance.
Assured Corrosion Resistance: Compliance guarantees the high molybdenum and nitrogen content essential for S31254’s signature resistance to pitting and crevice corrosion in chloride environments.
Uncompromised Structural Integrity: The standard mandates minimum tensile and yield strength, ensuring every pipe has the mechanical robustness to perform safely under pressure and stress.
Seamless Compliance & Traceability: It provides the basis for the Material Test Certificate (MTC), offering customers complete, verifiable proof that the material meets all project specifications.
S31254 / 1.4547 Stainless Steel Material Properties
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.020 |
| Manganese (Mn) | 1.00 |
| Phosphorus (P) | 0.030 |
| Sulfur (S) | 0.010 |
| Silicon (Si) | 0.80 |
| Chromium (Cr) | 19.5 - 20.5 |
| Nickel (Ni) | 17.5 - 18.5 |
| Molybdenum (Mo) | 6.0 - 6.5 |
| Nitrogen (N) | 0.18 - 0.22 |
| Copper (Cu) | 0.50 - 1.00 |
| Property | Value |
|---|---|
| Tensile Strength, min | 87 ksi (600 MPa) |
| Yield Strength (0.2% Offset), min | 44 ksi (300 MPa) |
| Elongation in 2" (50mm), min | 35% |
| Hardness, max | 220 HBW / 96 HRB |
Versatile Applications of S31254 / 1.4547 Stainless Steel Welded Pipe
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