1.2379 equivalent grades: ASTM, EN, JIS, GB, DIN
1.2379 is cold-work tool steel, 12 % Cr ledeburitic specified in EN ISO 4957. The cross-reference runs across 6 standard systems and grades every candidate, so the reason a substitution is safe is on the same row as the name. The full 1.2379 data sheet carries the composition and mechanical tables.
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For 1.2379 the exact matches are D2, BD2, Cr12Mo1V1 and 1 more, and material bought as one is accepted as the other without deviation. 1.2436, Kh12MF differ by one requirement, which is a line on the order rather than a redesign. 1.2363, 1.2842 serve in the same applications, but the composition differs enough that the engineer signs it off, not the buyer. Counted by system: 1 in AISI / SAE, 1 in BS (superseded British), 1 in GB/T (China), 1 in JIS (Japan), 3 in EN (European), 1 in GOST (Russia/CIS).
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| D2 | AISI / SAE | Identical | AISI D2 (UNS T30402, ASTM A681): C 1.40–1.60, Cr 11–13, Mo 0.70–1.20, V 0.50–1.10. Same steel; 1.2379 has a slightly tighter V/Mo window. |
| BD2 | BS (superseded British) | Identical | BS 4659 BD2. |
| Cr12Mo1V1 | GB/T (China) | Identical | GB/T 1299 Cr12Mo1V1 (D2 type): C 1.40–1.60, Cr 11–13, Mo 0.70–1.20, V 0.50–1.10. Cr12MoV is the older lower-Mo Chinese grade. |
| SKD11 | JIS (Japan) | Identical | JIS G4404 SKD11: C 1.40–1.60, Cr 11–13, Mo 0.80–1.20, V 0.20–0.50 — vanadium lower; hardenability and wear resistance close. |
| 1.2436 | EN (European) | Near | X210CrW12 (D6): tungsten-bearing 12 % Cr, slightly higher wear resistance, lower toughness. |
| Kh12MF | GOST (Russia/CIS) | Near | GOST 5950 Kh12MF: C 1.45–1.65, Cr 11–12.5, Mo 0.40–0.60, V 0.15–0.30 — lower Mo and V. |
| 1.2363 | EN (European) | Functional | X100CrMoV5 (A2): 5 % Cr air-hardening steel with better toughness, lower wear resistance. |
| 1.2842 | EN (European) | Functional | 90MnCrV8 (O2) oil-hardening steel for less demanding dies. |
Identical, near and functional are defined once on the grade index; the reason column below says which limit differs in each case.
1.2379 in AISI / SAE
- D2 — Identical AISI D2 (UNS T30402, ASTM A681): C 1.40–1.60, Cr 11–13, Mo 0.70–1.20, V 0.50–1.10. Same steel; 1.2379 has a slightly tighter V/Mo window.
1.2379 in BS (superseded British)
- BD2 — Identical BS 4659 BD2.
1.2379 in GB/T (China)
- Cr12Mo1V1 — Identical GB/T 1299 Cr12Mo1V1 (D2 type): C 1.40–1.60, Cr 11–13, Mo 0.70–1.20, V 0.50–1.10. Cr12MoV is the older lower-Mo Chinese grade.
1.2379 in JIS (Japan)
- SKD11 — Identical JIS G4404 SKD11: C 1.40–1.60, Cr 11–13, Mo 0.80–1.20, V 0.20–0.50 — vanadium lower; hardenability and wear resistance close.
1.2379 in EN (European)
- 1.2436 — Near X210CrW12 (D6): tungsten-bearing 12 % Cr, slightly higher wear resistance, lower toughness.
- 1.2363 — Functional X100CrMoV5 (A2): 5 % Cr air-hardening steel with better toughness, lower wear resistance.
- 1.2842 — Functional 90MnCrV8 (O2) oil-hardening steel for less demanding dies.
1.2379 in GOST (Russia/CIS)
- Kh12MF — Near GOST 5950 Kh12MF: C 1.45–1.65, Cr 11–12.5, Mo 0.40–0.60, V 0.15–0.30 — lower Mo and V.
Superseded names for 1.2379
- X155CrVMo12-1 — DIN 17350 (withdrawn): Same number 1.2379; renamed X153CrMoV12 in EN ISO 4957.
- X210Cr12 (1.2080) — DIN 17350: The older 2 % C / 12 % Cr steel (D3) it replaced — harder but more brittle.
- BD2 — BS 4659
- Z160CDV12 — NF A 35-590
- K110 — Böhler trade name: Sverker 21 (Uddeholm), Cryodur 2379 (Buderus), Thyrodur 2379.
Key data for 1.2379
Full composition, mechanical properties by thickness, heat treatment and applications for 1.2379 →
Verified against EN ISO 4957:2018. Last checked: September 2026.