Can 1.4301 stainless steel and STS304 be used interchangeably?
Kite yon mesaj
1.4301 and STS304 stainless steel replacement guide
1. Grade Equivalence & Standards
1.4301 (EN Standard, Europe)
: ASTM 304 (USA, UNS S30400), GB 06Cr19Ni10 (China, new standard).
: EN 10088-2 (for plates, bars, etc.).
: C Less than or equal to {{0}}.07%, Cr 17.5–19.5%, Ni 8.0–10.5%.
STS304 (KS Standard, South Korea)
: JIS SUS304 (Japan), ASTM 304 (USA).
: KS D 3503 (for stainless steel bars, wires).
: C Less than or equal to {{0}}.08%, Cr 18.0–20.0%, Ni 8.0–10.5%.
: Highly similar to 1.4301, with a slightly higher Cr upper limit for better high-temperature oxidation resistance.
2. 1.4301 stainless steel vs. STS304 Chemical Composition Comparison
| 1.4301 (EN 10088-2) | STS304 (KS D 3503) | |
|---|---|---|
| Less than or equal to 0.07% | Less than or equal to 0.08% | |
| 17.5–19.5% | 18.0–20.0% | |
| 8.0–10.5% | 8.0–10.5% | |
| Less than or equal to 1.0% | Less than or equal to 1.0% | |
| Less than or equal to {{0}}.045% / Less than or equal to 0.030% | Less than or equal to {{0}}.045% / Less than or equal to 0.030% |
3. 1.4301 stainless steel vs. STS304 Mechanical Properties & Workability
| 1.4301 | STS304 | |
|---|---|---|
| 520–720 MPa | Greater than or equal to 520 MPa | |
| Greater than or equal to 210 MPa | Greater than or equal to 205 MPa | |
| Greater than or equal to 45% | Greater than or equal to 40% | |
| Excellent, no post-weld heat treatment needed |
4. 1.4301 stainless steel vs. STS304 Corrosion Resistance & Application Scenarios
| 1.4301 | STS304 | |
|---|---|---|
| Good (short-term resistance) | Good (short-term resistance) | |
| High-Temperature Oxidation (>600 degree ) | ||
| Low (C Less than or equal to 0.07%) | Moderate (C Less than or equal to 0.08%) |
1.4301 stainless steel vs. STS304:Scenario-Based Interchangeability:
: Non-welded, room-temperature applications (e.g., architectural parts, cold-formed components).
Non-Interchangeable:
High-temperature (>600 degree ) or strongly oxidizing media (e.g., concentrated sulfuric acid).
Export projects requiring compliance with EN 10088-2 or KS D 3503.
5.Procurement Decision Flowchart
: Use 1.4301 for exports to Europe; accept STS304 for South Korea.
: Prefer suppliers certified to both EN 10088-2 and KS D 3503 to minimize interchangeability risks.
| Non-welded, Room-Temperature | ||
| EN 10088-2 Compliance | ||
| KS D 3503 Compliance | ||
| High-Temperature Oxidation |
