A practical cross-reference of the most common hot work, cold work, and plastic mold tool steel grades — Chinese (GB), Japanese (JIS), American (AISI), and European (DIN/EN) standards — with their chemical composition ranges.
Published by HUBEI JIEFENG METALLURGY INDUSTRIAL & TRADING CO., LTD. (JF Metals) · Huangshi, Hubei, China · Established 2008
How to read the tables: All values are in weight percent (%). "P&S ≤0.030" means phosphorus + sulfur combined content is controlled below 0.030%. A dash "–" means the element is not specified for that grade.
1. Hot Work Tool Steel (H13 / SKD61 / 1.2344 / 8407)
Hot work tool steels retain hardness and strength at elevated temperature. They are the standard choice for aluminum and zinc die-casting dies, extrusion tools, and hot forging dies.
| Grade | Standard | C | Si | Mn | P&S | Cr | Mo | V |
|---|---|---|---|---|---|---|---|---|
| 4Cr5MoSiV | GB | 0.33–0.43 | 0.80–1.20 | 0.20–0.50 | ≤0.030 | 4.75–5.50 | 1.10–1.60 | 0.30–0.60 |
| H11 | AISI | 0.33–0.43 | 0.80–1.20 | 0.20–0.50 | ≤0.030 | 4.75–5.50 | 1.10–1.60 | 0.30–0.60 |
| 1.2343 | DIN | 0.36–0.42 | 0.90–1.20 | 0.30–0.50 | ≤0.030 | 4.80–5.80 | 1.10–1.40 | 0.25–0.50 |
| 4Cr5MoSiV1 | GB | 0.32–0.42 | 0.80–1.20 | 0.20–0.50 | ≤0.030 | 4.75–5.50 | 1.10–1.75 | 0.80–1.20 |
| H13 | AISI | 0.32–0.45 | 0.80–1.20 | 0.20–0.50 | ≤0.030 | 4.75–5.50 | 1.10–1.75 | 0.80–1.20 |
| 1.2344 | DIN | 0.37–0.42 | 0.90–1.20 | 0.30–0.50 | ≤0.030 | 4.80–5.50 | 1.20–1.50 | 0.90–1.10 |
| SKD61 | JIS | 0.35–0.42 | 0.80–1.20 | 0.25–0.50 | ≤0.030 | 4.80–5.50 | 1.00–1.50 | 0.80–1.15 |
| 8407 | ASSAB | 0.35–0.42 | 0.80–1.20 | 0.30–0.60 | ≤0.030 | 4.85–5.50 | 1.20–1.60 | 0.85–1.15 |
2. Cold Work Tool Steel (D2 / SKD11 / 1.2379 / O1 / A2 / DC53)
Cold work tool steels offer high wear resistance and are used for blanking and punching dies, cold forming tools, and shear blades.
| Grade | Standard | C | Si | Mn | P&S | Cr | Mo | V | W |
|---|---|---|---|---|---|---|---|---|---|
| Cr12 | GB | 2.00–2.30 | ≤0.40 | ≤0.40 | ≤0.030 | 11.50–13.00 | – | – | – |
| D3 | AISI | 2.00–2.35 | 0.10–0.60 | 0.20–0.60 | ≤0.030 | 11.00–13.00 | – | – | – |
| 1.2080 | DIN | 1.90–2.20 | 0.10–0.40 | 0.15–0.45 | ≤0.030 | 11.00–12.00 | – | – | – |
| Cr12W | GB | 2.00–2.30 | ≤0.40 | ≤0.40 | ≤0.030 | 11.00–12.50 | – | – | 0.60–0.90 |
| D6 | AISI | 2.00–2.20 | 0.70–0.90 | 0.20–0.40 | ≤0.030 | 11.50–12.50 | – | – | 0.60–0.90 |
| 1.2436 | DIN | 2.00–2.25 | 0.10–0.40 | 0.15–0.45 | ≤0.030 | 11.00–12.00 | – | – | 0.60–0.80 |
| Cr12MoV | GB | 1.45–1.70 | ≤0.40 | ≤0.40 | ≤0.030 | 11.00–12.50 | 0.40–0.60 | 0.15–0.30 | – |
| Cr12Mo1V1 | GB | 1.40–1.60 | ≤0.60 | ≤0.60 | ≤0.030 | 11.00–13.00 | 0.70–1.20 | 0.50–1.10 | – |
| D2 | AISI | 1.40–1.60 | 0.10–0.60 | 0.20–0.60 | ≤0.030 | 11.00–13.00 | 0.70–1.20 | 0.50–1.10 | – |
| 1.2379 | DIN | 1.50–1.60 | 0.10–0.40 | 0.15–0.45 | ≤0.030 | 11.00–12.00 | 0.60–0.80 | 0.90–1.10 | – |
| SKD11 | JIS | 1.40–1.60 | ≤0.40 | ≤0.60 | ≤0.030 | 11.00–13.00 | 0.80–1.20 | 0.20–0.50 | – |
| Cr5Mo1V | GB | 0.95–1.05 | ≤0.50 | ≤1.00 | ≤0.030 | 4.75–5.50 | 0.90–1.40 | 0.15–0.50 | – |
| A2 | AISI | 0.95–1.05 | 0.10–0.50 | 0.40–1.00 | ≤0.030 | 4.75–5.50 | 0.90–1.40 | 0.15–0.50 | – |
| 1.2363 | DIN | 0.90–1.05 | 0.20–0.40 | 0.40–0.70 | ≤0.030 | 4.80–5.50 | 0.90–1.20 | 0.10–0.30 | – |
| SKD12 | JIS | 0.95–1.05 | 0.10–0.40 | 0.40–0.80 | ≤0.030 | 4.80–5.50 | 0.90–1.20 | 0.15–0.35 | – |
| Cr8Mo2SiV | GB | 0.90–1.05 | 0.80–1.10 | 0.20–0.50 | ≤0.030 | 7.80–8.50 | 1.80–2.10 | 0.15–0.35 | – |
| DC53 | Daido | 0.90–1.10 | 0.80–1.20 | ≤0.40 | ≤0.025 | 7.50–8.50 | 1.80–2.00 | 0.20–0.50 | – |
| 9CrWMn | GB | 0.85–0.95 | ≤0.40 | 0.90–1.20 | ≤0.030 | 0.50–0.80 | – | – | 0.50–0.80 |
| O1 | AISI | 0.85–1.00 | 0.10–0.50 | 1.00–1.40 | ≤0.030 | 0.40–0.60 | – | ≤0.30 | 0.40–0.60 |
| 1.2510 | DIN | 0.90–1.05 | 0.15–0.35 | 1.00–1.20 | ≤0.030 | 0.50–0.70 | – | 0.05–0.15 | 0.50–0.70 |
| 9Mn2V | GB | 0.85–0.95 | ≤0.40 | 1.70–2.00 | ≤0.030 | – | – | 0.10–0.25 | – |
| O2 | AISI | 0.85–0.95 | ≤0.50 | 1.40–1.80 | ≤0.030 | ≤0.50 | ≤0.30 | ≤0.30 | – |
| 1.2842 | DIN | 0.85–0.95 | 0.10–0.40 | 1.90–2.10 | ≤0.030 | 0.20–0.50 | – | 0.05–0.15 | – |
3. Plastic Mold Steel (P20 / 718 / 1.2738 / 1.2311)
Plastic mold steels are pre-hardened, easy to machine, and polish well — used for injection mold bases, cavity blocks, and large mold plates.
| Grade | Standard | C | Si | Mn | P&S | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|---|
| 3Cr2Mo / P20 | GB / AISI | 0.28–0.40 | 0.20–0.80 | 0.60–1.00 | ≤0.030 | 1.40–2.00 | 0.30–0.55 | – |
| 1.2311 | DIN | 0.35–0.45 | 0.20–0.40 | 1.30–1.60 | ≤0.030 | 1.80–2.10 | 0.15–0.25 | – |
| 3Cr2NiMnMo / 1.2738 | GB / DIN | 0.32–0.42 | 0.20–0.40 | 1.10–1.50 | ≤0.030 | 1.70–2.00 | 0.25–0.40 | 0.85–1.15 |
| 718 | ASSAB | 0.28–0.40 | 0.20–0.80 | 0.60–1.00 | ≤0.030 | 1.40–2.00 | 0.30–0.55 | 0.80–1.20 |
Common Grade Equivalents at a Glance
| Category | Grade Equivalents |
|---|---|
| Hot Work | H13 ≈ SKD61 ≈ 1.2344 ≈ 4Cr5MoSiV1 ≈ 8407 (ASSAB) |
| High-Carbon High-Chromium | D2 ≈ SKD11 ≈ 1.2379 ≈ Cr12MoV |
| Air-Hardening | A2 ≈ SKD12 ≈ 1.2363 ≈ Cr5Mo1V |
| Oil-Hardening | O1 ≈ 1.2510 ≈ 9CrWMn |
| Plastic Mold | P20 ≈ 1.2311 · 718 ≈ 1.2738 |
Why Work With JF Metals
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- Full grade coverage — hot work, cold work, and plastic mold tool steels, plus cutting / sawing / custom machining services.
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