310 equivalent grades: ASTM, EN, JIS, GB, DIN
Cross-reference for 310 across standard systems. Each match is graded so you can see how safe the substitution is. Austenitic heat-resisting stainless steel (25 % Cr, 20 % Ni) — full 310 data sheet.
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| 310S24 | BS (superseded British) | Identical | BS 1449 310S24 / 310S31. |
| 1.4845 | EN (European) | Identical | X8CrNi25-21: C ≤ 0.10, Cr 24–26, Ni 19–22 — corresponds to 310S; dual-certified. |
| 06Cr25Ni20 | GB/T (China) | Identical | GB/T 20878 06Cr25Ni20 (formerly 0Cr25Ni20). |
| SUS310S | JIS (Japan) | Identical | JIS G4304 SUS310S: C ≤ 0.08, Cr 24–26, Ni 19–22, Si ≤ 1.5. |
| 309 / 309S | AISI / SAE | Near | S30900/S30908 (22–24 Cr, 12–15 Ni): the intermediate heat-resisting grade to ~1000 °C; cheaper, less oxidation and carburization resistance. |
| 1.4841 | EN (European) | Near | X15CrNiSi25-21 (EN 10095): C ≤ 0.20, Si 1.5–2.5 — the higher-carbon, high-Si heat-resisting version closer to plain 310. |
| 10Kh23N18 / 20Kh23N18 | GOST (Russia/CIS) | Near | GOST 5632 20Kh23N18: C ≤ 0.20, Cr 22–25, Ni 17–20 — the Russian 25-20 type; 10Kh23N18 is the lower-carbon version. |
| 321 | AISI / SAE | Functional | Stabilized 18-8 for service to ~870 °C; 310 takes over above that. |
| 253MA / 1.4835 | EN (European) | Functional | S30815: rare-earth/N-alloyed 21-11 grade with higher creep strength at 850–1100 °C at lower Ni cost. |
Identical = same composition and mechanical limits within rounding. Near = one limit differs (e.g. carbon max or impact temperature). Functional = interchangeable for most uses after an engineering check.
How the matches are graded
Identical means the chemical composition windows overlap so that material certified to one specification meets the other without deviation, and the mechanical minimums are the same or the other is inside them — mills usually dual-certify. Near means one limit differs (a carbon maximum, an impact temperature, a strength minimum or a delivery condition) and a substitution needs a one-line engineering check. Functional means the grades serve the same purpose but are not the same steel — a designer can often use one for the other, but only after re-checking the design.
310 in BS (superseded British)
- 310S24 — Identical BS 1449 310S24 / 310S31.
310 in EN (European)
- 1.4845 — Identical X8CrNi25-21: C ≤ 0.10, Cr 24–26, Ni 19–22 — corresponds to 310S; dual-certified.
- 1.4841 — Near X15CrNiSi25-21 (EN 10095): C ≤ 0.20, Si 1.5–2.5 — the higher-carbon, high-Si heat-resisting version closer to plain 310.
- 253MA / 1.4835 — Functional S30815: rare-earth/N-alloyed 21-11 grade with higher creep strength at 850–1100 °C at lower Ni cost.
310 in GB/T (China)
- 06Cr25Ni20 — Identical GB/T 20878 06Cr25Ni20 (formerly 0Cr25Ni20).
310 in JIS (Japan)
- SUS310S — Identical JIS G4304 SUS310S: C ≤ 0.08, Cr 24–26, Ni 19–22, Si ≤ 1.5.
310 in AISI / SAE
- 309 / 309S — Near S30900/S30908 (22–24 Cr, 12–15 Ni): the intermediate heat-resisting grade to ~1000 °C; cheaper, less oxidation and carburization resistance.
- 321 — Functional Stabilized 18-8 for service to ~870 °C; 310 takes over above that.
310 in GOST (Russia/CIS)
- 10Kh23N18 / 20Kh23N18 — Near GOST 5632 20Kh23N18: C ≤ 0.20, Cr 22–25, Ni 17–20 — the Russian 25-20 type; 10Kh23N18 is the lower-carbon version.
Superseded names for 310
- 1.4845 / X8CrNi25-21 — EN 10088 / EN 10095: Older DIN name X12CrNi25 21.
- S31000 / S31008 / S31009 — UNS: 310 / 310S / 310H.
- 310S24 / 310S31 — BS 1449 / BS 970
- 25-20 — Colloquial: Named for its Cr/Ni content.
- HK-40 / CK-20 — ACI / ASTM A297, A351: Cast 25-20 grades (HK has 0.4 % C for creep).
Key data for 310
Full composition, mechanical properties by thickness, heat treatment and applications for 310 →
Verified against ASTM A240/A240M-22. Last checked: September 2026.