1.2344 equivalent grades: ASTM, EN, JIS, GB, DIN
1.2344 is hot-work tool steel, 5 % Cr secondary-hardening specified in EN ISO 4957. Every grade in the database that can stand in for it is listed below, drawn from 5 standard systems, each with the reason it does or does not match exactly. The full 1.2344 data sheet carries the composition and mechanical tables.
Last updated
1.2344 and H13, 4Cr5MoSiV1, SKD61 are the same steel under different national numbers; a single mill certificate covers both. A single clause separates 1.2343, 1.2363, 4Kh5MFS: differ either a test temperature or a composition bound that the other does not. At the functional level 1.2367, 1.2365, 1.2714 and 1 more serve as a replacement once the design has been re-run. The cross-reference below covers 1 in AISI / SAE, 1 in GB/T (China), 1 in JIS (Japan), 6 in EN (European), 1 in GOST (Russia/CIS).
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| H13 | AISI / SAE | Identical | AISI H13 (UNS T20813, ASTM A681): C 0.32–0.45, Cr 4.75–5.50, Mo 1.10–1.75, V 0.80–1.20. Same steel; the ASTM window is wider at both ends, so a certificate to A681 can sit outside the EN ISO 4957 limits while still being correctly labelled H13. |
| 4Cr5MoSiV1 | GB/T (China) | Identical | GB/T 1299 4Cr5MoSiV1 is the direct H13 transcription; 4Cr5MoSiV is the older lower-vanadium grade equivalent to H11. |
| SKD61 | JIS (Japan) | Identical | JIS G4404 SKD61: C 0.35–0.42, Si 0.80–1.20, Cr 4.80–5.50, Mo 1.00–1.50, V 0.80–1.15. For die casting work the two are interchangeable. |
| 1.2343 | EN (European) | Near | X37CrMoV5-1 (H11): the same steel with vanadium at 0.30–0.50 instead of 1.00. Lower wear and temper resistance, noticeably higher toughness — the European default for large aluminium die casting dies, where heat checking rather than erosion ends the tool. |
| 1.2363 | EN (European) | Near | X40CrMoV5-1 (H13): nearly the same alloy content with 0.40 % C and 1 % Si. The low carbon makes it a hot-work steel — it cannot reach 60 HRC, but it holds 45 HRC at 550 °C. |
| 4Kh5MFS | GOST (Russia/CIS) | Near | GOST 5950 4Kh5MFS: C 0.32–0.40, Cr 4.50–5.50, Mo 1.20–1.50, V 0.30–0.50 — vanadium is roughly half, so tempering resistance is lower. |
| 1.2367 | EN (European) | Functional | X38CrMoV5-3: molybdenum raised to 2.8–3.3 %. Better high-temperature strength and thermal-fatigue resistance for large dies and extrusion tooling; it is the usual upgrade when 1.2344 heat-checks too early. |
| 1.2365 | EN (European) | Functional | 32CrMoV12-28: 3 % Mo, 0.30 % C hot-work steel for hot extrusion mandrels and die holders where toughness outranks hardness. |
| 1.2714 | EN (European) | Functional | 55NiCrMoV7 (L6): the nickel hot-work forging-die steel. Tougher and used pre-hardened at 38–44 HRC, but it loses hardness above about 500 °C and is not a die casting steel. |
| 1.2738 | EN (European) | Functional | X40CrMoV5-1 (H13) at 48–52 HRC: the choice when the mould runs hot or abrasively filled polymers erode the cavity. Far more expensive, must be heat treated after machining, and an unnecessary step for ordinary thermoplastics. |
Identical, near and functional are defined once on the grade index; the reason column below says which limit differs in each case.
1.2344 in AISI / SAE
- H13 — Identical AISI H13 (UNS T20813, ASTM A681): C 0.32–0.45, Cr 4.75–5.50, Mo 1.10–1.75, V 0.80–1.20. Same steel; the ASTM window is wider at both ends, so a certificate to A681 can sit outside the EN ISO 4957 limits while still being correctly labelled H13.
1.2344 in GB/T (China)
- 4Cr5MoSiV1 — Identical GB/T 1299 4Cr5MoSiV1 is the direct H13 transcription; 4Cr5MoSiV is the older lower-vanadium grade equivalent to H11.
1.2344 in JIS (Japan)
- SKD61 — Identical JIS G4404 SKD61: C 0.35–0.42, Si 0.80–1.20, Cr 4.80–5.50, Mo 1.00–1.50, V 0.80–1.15. For die casting work the two are interchangeable.
1.2344 in EN (European)
- 1.2343 — Near X37CrMoV5-1 (H11): the same steel with vanadium at 0.30–0.50 instead of 1.00. Lower wear and temper resistance, noticeably higher toughness — the European default for large aluminium die casting dies, where heat checking rather than erosion ends the tool.
- 1.2363 — Near X40CrMoV5-1 (H13): nearly the same alloy content with 0.40 % C and 1 % Si. The low carbon makes it a hot-work steel — it cannot reach 60 HRC, but it holds 45 HRC at 550 °C.
- 1.2367 — Functional X38CrMoV5-3: molybdenum raised to 2.8–3.3 %. Better high-temperature strength and thermal-fatigue resistance for large dies and extrusion tooling; it is the usual upgrade when 1.2344 heat-checks too early.
- 1.2365 — Functional 32CrMoV12-28: 3 % Mo, 0.30 % C hot-work steel for hot extrusion mandrels and die holders where toughness outranks hardness.
- 1.2714 — Functional 55NiCrMoV7 (L6): the nickel hot-work forging-die steel. Tougher and used pre-hardened at 38–44 HRC, but it loses hardness above about 500 °C and is not a die casting steel.
- 1.2738 — Functional X40CrMoV5-1 (H13) at 48–52 HRC: the choice when the mould runs hot or abrasively filled polymers erode the cavity. Far more expensive, must be heat treated after machining, and an unnecessary step for ordinary thermoplastics.
1.2344 in GOST (Russia/CIS)
- 4Kh5MFS — Near GOST 5950 4Kh5MFS: C 0.32–0.40, Cr 4.50–5.50, Mo 1.20–1.50, V 0.30–0.50 — vanadium is roughly half, so tempering resistance is lower.
Superseded names for 1.2344
- X40CrMoV5-1 — DIN 17350 (withdrawn): Same number and same short name; only the standard changed to EN ISO 4957.
- BH13 — BS 4659 (withdrawn): The British designation of the same steel.
- Z40CDV5 — NF A 35-590: The French designation.
- W302 / Orvar Supreme — Böhler / Uddeholm trade names: Thyrotherm 2344, Cryodur 2344, Vidar Superior. Premium versions are remelted and sold against NADCA #207 rather than against EN ISO 4957 alone.
Key data for 1.2344
Tensile≈ 760–850 (typ.) MPa
Carbon0.37 – 0.43 %
StandardEN ISO 4957
Full composition, mechanical properties by thickness, heat treatment and applications for 1.2344 →
Verified against EN ISO 4957:2018. Last checked: October 2026.