X5CrNi18-10
1.4301THE most widely used stainless steel worldwide — the original "18/8" austenitic (V2A). Good corrosion resistance in natural environments (water, humidity, weak acids). Non-magnetic when annealed. NOT resistant to intergranular corrosion after welding — use 1.4307 (304L) or 1.4541 (321) for welded service. PREN 17.5-21.1 — not suitable for chloride/seawater. Used everywhere: kitchen equipment, food processing, architecture, chemical tanks, automotive, medical devices.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 304 / UNS S30400 | S30400 | REF |
| 🇪🇺 | EN | Europe | X5CrNi18-10 / 1.4301 | 1.4301 | 100% |
| 🇯🇵 | JIS | Japan | SUS 304 | — | 100% |
| 🇬🇧 | BS | United Kingdom | 304S31 | — | 95% |
| 🇨🇳 | GB | China | 0Cr18Ni9 | — | 90% |
Sources: ASTM A240, EN 10088-3, JIS G4303, BS 970, GB/T 1220
Chemical composition comparison (wt%)
Side-by-side: X5CrNi18-10 (EN) (EN 10088-3) vs 304S31 (BS)
| Element | X5CrNi18-10 (EN) | 304S31 (BS) | Overlap |
|---|---|---|---|
| C | 0–0.07% | — | — |
| Si | 0–1% | — | — |
| Mn | 0–2% | — | — |
| P | 0–0.045% | — | — |
| S | 0–0.015% | — | — |
| Cr | 17.5–19.5% | — | — |
| Ni | 8–10.5% | — | — |
| N | 0–0.11% | — | — |
Mechanical properties
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 500–700 | MPa |
| Yield Strength | ≥ 190 | MPa |
| Elongation | ≥ 45 | % |
| Hardness HB | ≤ 215 | HB |
| Elastic Modulus | ≥ 200 | GPa |
| Density | ≥ 7.9 | g/cm3 |
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 500–700 | MPa |
| Yield Strength Rp0.2 | ≥ 190 | MPa |
| Elongation A | ≥ 45 | % |
| Hardness HB | ≤ 215 | HB |
| Impact Energy KV | ≥ 100 | J |
General
| Property | Value | Unit |
|---|---|---|
| Density | 7.9 | g/cm³ |
| Thermal Conductivity | 15 | W/mK |
Compatibility verdict
X5CrNi18-10 and 304S31: 95% composition match
Close equivalents but NOT identical.
Related materials
304 Stainless Steel
1.4301The most widely used austenitic stainless steel. Excellent corrosion resistance, good formability and weldability. Standard choice for food processing, chemical, and architectural applications.
316L
1.4404Low-carbon austenitic stainless steel with molybdenum addition. Superior corrosion resistance to 304, especially against chlorides and pitting. Standard choice for chemical processing, marine, medical implants, and pharmaceutical equipment.
430 Stainless Steel
1.4016Ferritic chromium stainless steel with good corrosion resistance and formability. Lower cost than austenitic grades. Used for automotive trim, kitchen sinks, architectural panels, and appliance components.
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