When sourcing stainless steel materials globally, many buyers and engineers encounter different grade designations depending on regional standards. A common question is: Is EN 1.4301 the same as AISI 304 stainless steel? The short answer is yes-they are equivalent grades under different naming systems.
AISI 304 stainless steel pipe
Both EN 1.4301 and AISI 304 refer to an austenitic stainless steel with excellent corrosion resistance, good formability, and reliable weldability. These grades are widely used in food processing, construction, and industrial equipment.
| Standard | Grade Name |
|---|---|
| EN (Europe) | 1.4301 |
| AISI/ASTM (USA) | 304 |
| UNS | S30400 |
| ISO | X5CrNi18-10 |
| Element | EN 1.4301 / AISI 304 |
|---|---|
| Carbon (C) | ≤ 0.07% |
| Chromium (Cr) | 17.5–19.5% |
| Nickel (Ni) | 8.0–10.5% |
| Manganese (Mn) | ≤ 2.0% |
| Silicon (Si) | ≤ 1.0% |
| Phosphorus (P) | ≤ 0.045% |
| Sulfur (S) | ≤ 0.015% |
| Nitrogen (N) | ≤ 0.11% |
| Property | Typical Value |
|---|---|
| Yield Strength | ≥ 210 MPa |
| Tensile Strength | 520–720 MPa |
| Elongation | ≥ 45% |
| Hardness (HB) | ≤ 215 HB |
If you're sourcing globally, remember:
Use AISI 304 when referencing American standards (e.g., ASTM A240, A276).
Use EN 1.4301 for European specifications (e.g., EN 10088-2).
Always confirm with your supplier that the material complies with the mechanical and corrosion resistance requirements of your project.
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