ASTM A358 Grade 904L Electric Fusion Welded (EFW) Pipes are a specific type of stainless steel pipes that conform to the ASTM A358 standard and are made using grade 904L stainless steel. This grade of stainless steel is known for its high resistance to corrosion in a wide range of aggressive environments, including those containing sulfuric acid, chloride, and other corrosive substances. The "EFW" in the name stands for Electric Fusion Welding, which is the process used to manufacture these pipes. The ASTM A358 standard outlines the requirements for electric fusion welded austenitic chromium-nickel stainless steel pipes for high-temperature and general corrosive service. Grade 904L is a non-stabilized low carbon high alloy austenitic stainless steel that possesses excellent formability, weldability, and toughness. It also demonstrates good resistance to crevice corrosion and stress corrosion cracking.
These pipes find applications in various industries such as chemical processing, petrochemicals, pharmaceuticals, oil and gas, and more, where resistance to corrosion is paramount. The electric fusion welding process used in their fabrication ensures strong and durable joints, making them suitable for demanding conditions. Metal Tubular is a recognized supplier known for providing high-quality ASTM A358 Grade 904L EFW Pipes.
They offer a range of stainless steel pipes, including those made from grade 904L, which is a preferred choice for industries dealing with corrosive environments. Metal Tubular's commitment to quality, reliability, and meeting industry standards makes them a reliable source for procuring stainless steel pipes for various industrial applications. Their expertise in sourcing and supplying stainless steel pipes ensures that customers receive products that meet the required specifications and performance standards.
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Specification:
| Property | Specification |
| Standard | ASTM A358 |
| Grade | 904L |
| Type | EFW (Electric Fusion Welded) |
| Corrosion Resistance | Excellent |
| Applications | Chemical, Petrochemical, Oil & Gas |
| Formability | Excellent |
| Weldability | Good |
Chemical Composition of ASTM A358 Grade 904L EFW Pipes
| Element | Composition Range |
| Carbon (C) | 0.020 max |
| Silicon (Si) | 1.00 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.035 max |
| Chromium (Cr) | 19.0 - 23.0 |
| Nickel (Ni) | 23.0 - 28.0 |
| Molybdenum (Mo) | 4.0 - 5.0 |
| Copper (Cu) | 1.0 - 2.0 |
Mechanical Properties of ASTM A358 Grade 904L EFW Pipes
| Mechanical Property | Minimum | Maximum |
| Tensile Strength | 490 MPa (71,000 psi) | 690 MPa (100,000 psi) |
| Yield Strength (0.2% Offset) | 220 MPa (32,000 psi) | 690 MPa (100,000 psi) |
| Elongation | 35% | - |
| Brinell Hardness (HB) | - | ≤ 150 |
| Impact Toughness (Room Temperature) | Greater than 100 J (74 ft-lbf) | - |
Advantages of ASTM A358 Grade 904L EFW Pipes
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
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Applications Industry
| Pharmaceutical Equipment | Chemical Equipment |
| Sea Water Equipment | Heat Exchangers |
| Heat Exchangers | Gas Processing |
| Condensers | Specialty Chemicals |
| Pulp and Paper Industry | Pharmaceuticals |
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