SB-424, B 424 Stainless Steel Welded Pipe Supplier in China
Discover our premium B 424 welded pipes, manufactured from high-performance Alloy 825 (N08825) plate. Engineered to meet rigorous SB-424 standards, they deliver outstanding resistance to acids, pitting, and stress corrosion cracking, ensuring maximum reliability in the most severe chemical processing and oil recovery applications.
SB-424, B 424 Welded Pipe - Detailed Specifications
| Specification Parameter | Details |
|---|---|
| International Grades | UNS: N08825, EN: 2.4858, Common Name: Alloy 825 |
| Pipe Manufacturing Standard | ASTM B705 (Welded), ASTM B775 (EFW), ASME SB705, ASME SB775 |
| Raw Material Specification | ASTM B424 / ASME SB-424 (for plate, sheet, and strip) |
| Outer Diameter (OD) | 1/2 NPS to 24" NPS (21.3mm to 610mm)" |
| Wall Thickness (WT) | Schedule 10S, 40S, 80S, XS (2.11mm to 30mm) |
| 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 both reducing and oxidizing acids (sulfuric, phosphoric), pitting, crevice corrosion, and chloride-induced stress corrosion cracking (SCC). |
| Testing & Inspection | Hydrostatic Test, NDT (Radiography, Ultrasonic), PMI (Positive Material Identification), Chemical Analysis, Mechanical Testing (Tensile, Bend) |
| Surface Finish | Annealed and Pickled Finish |
Understanding ASTM A240 / ASME SA-240
What It Is:
ASTM B424 / ASME SB-424 is the master specification for the high-performance Alloy 825 plate used to fabricate our welded pipes.
The Material Blueprint: It governs the precise chemical composition of nickel, iron, chromium, molybdenum, and copper that gives Alloy 825 its exceptional versatility.
Mandates Key Properties: The standard specifies minimum mechanical properties (tensile strength, ductility) and the required heat treatment to ensure maximum corrosion resistance.
A Foundation of Quality: It serves as the primary quality control document for the raw material, ensuring every pipe starts with a fully certified and compliant foundation.
Why It Is Your Core Focus:
Our strict adherence to this standard is our commitment to delivering unparalleled reliability and guaranteed performance in every welded pipe.
Assured Corrosion Resistance: Compliance guarantees the pipe will perform reliably against aggressive media like sulfuric acid and prevent chloride-induced stress corrosion cracking (SCC).
Guaranteed Safety & Integrity: The standard ensures the material has the mechanical strength to safely handle design pressures and temperatures in critical industrial processes.
Verifiable Compliance & Traceability: It provides the basis for the Material Test Certificate (MTC), giving you full, verifiable proof that the pipe meets all project specifications.
SB-424, B 424 Stainless Steel Material Properties
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 38.0 - 46.0 |
| Iron (Fe) | 22.0 min |
| Chromium (Cr) | 19.5 - 23.5 |
| Molybdenum (Mo) | 2.5 - 3.5 |
| Copper (Cu) | 1.5 - 3.0 |
| Titanium (Ti) | 0.6 - 1.2 |
| Carbon (C) | 0.05 max |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 0.5 max |
| Sulfur (S) | 0.03 max |
| Aluminum (Al) | 0.2 max |
| Property | Value (Minimum) |
|---|---|
| Tensile Strength | 85 ksi (586 MPa) |
| Yield Strength (0.2% Offset) | 35 ksi (241 MPa) |
| Elongation in 2 (50mm)" | 30% |
Versatile Applications of SB-424, B 424 Stainless Steel Welded Pipe
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Request a Quote for B 424 / Alloy 825 Welded Pipe
Secure your supply of high-performance Alloy 825 welded pipes, manufactured to strict B 424 / SB-424 standards for guaranteed performance in severe acid and chloride environments. Submit your project requirements, and our expert team will provide a fast, detailed quotation to ensure your project’s success and long-term reliability.
