304 Stainless Steel Welded Pipe - ASME SA-240, ASTM A240 Supplier in China
Engineered for reliability and superior performance, our 304 stainless steel welded pipe is the industry standard for a wide range of applications. Manufactured to strict ASTM A312 pipe standards using prime ASTM A240 certified raw material, it offers an exceptional balance of corrosion resistance, formability, and strength.
ASME SA-240, ASTM A240 welded pipe - Detailed Specifications
| Parameter | Specification |
|---|---|
| Product Type | Stainless Steel Welded Pipe |
| Grade | 304 (UNS S30400) |
| Pipe Specifications | ASTM A312, ASME SA-312, ASTM A358, ASME SA-358, EN 10217-7, DIN 17457 |
| Raw Material Spec | ASTM A240, ASME SA-240 |
| Outer Diameter (OD) | 1/2 to 48" (21.3mm to 1219mm)" |
| Wall Thickness (WT) | SCH 5S, 10S, 40S, 80S (1.65mm to 50mm) & Custom |
| Length | 6 meters (20 ft), 12 meters (40 ft), or custom cut-to-length |
| Welding Method | TIG (GTAW), PAW (Plasma Arc Welding), Laser Beam Welding (LBW) |
| Surface Finish | No. 1 / Annealed and Pickled (AP), Brushed, #4 Satin, #8 Mirror Polish |
| End Finish | Plain End (PE), Beveled End (BE) |
Understanding ASTM A240 / ASME SA-240
What It Is:
This is the single most important standard for the raw material used to manufacture your 304 welded pipe. It covers the specifications for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip.
- ASTM A240 is the designation from the American Society for Testing and Materials.
- ASME SA-240 is the designation from the American Society of Mechanical Engineers, adopted for use in boiler and pressure vessel code applications. The technical requirements are essentially identical.
Why It Is Your Core Focus:
When you specify A240/SA-240, you are guaranteeing the fundamental quality of the steel itself. This standard dictates:
- Chemical Composition: Ensuring the precise percentages of Chromium (Cr) and Nickel (Ni) that give 304 its signature corrosion resistance.
- Mechanical Properties: Defining the material’s minimum tensile strength, yield strength, and ductility.
- Manufacturing Process: Including requirements for heat treatment (annealing), which is crucial for relieving stress and maximizing corrosion resistance.
Grade 304 (UNS S30400) Material Properties per ASME SA-240 and ASTM A240
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Silicon (Si) | ≤ 0.75 |
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 8.0 - 10.5 |
| Property | Value |
|---|---|
| Tensile Strength (min) | 515 MPa (75,000 psi) |
| Yield Strength (min) | 205 MPa (30,000 psi) |
| Elongation in 2 (min)" | 40% |
| Hardness (max) | 201 HBW or 92 HRB |
Versatile Applications of 304 Welded Pipe
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