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Eternal
32CrMoV12-28 (material number 1.2365) is a Cr-Mo-V alloy hot work tool steel that meets the ISO 4957:2018 standard. It is designed for applications that demand very high performance in terms of high-temperature strength, resistance to softening during tempering, and resistance to thermal fatigue. Because of its excellent overall properties, this material is widely used in demanding conditions such as non-ferrous metal die casting, hot forging, and extrusion forming.
Compared with the traditional material X37CrMoV5-1 (1.2343/SKD61), 32CrMoV12-28 has a higher Mo content (2.5-3.0%), which greatly improves its high-temperature strength and tempering stability. In addition, forgings made of this material have excellent resistance to thermal fatigue cracking and can be cooled with strong water during operation. This is very important for improving the production efficiency and service life of molds.
ELEMENT | wt% |  |
C | 0.28~ 0.35 | |
Si | 0.10 ~ 0.40 | |
Mn | 0.15 ~ 0.45 | |
Cr | 2.70 ~ 3.20 | |
Mo | 2.50 ~ 3.00 | |
V | 0.40 ~ 0.70 | |
P | ≤ 0.03 | |
S | ≤ 0.03 |
Nation | Grade | Standard |
China | 3Cr3Mo3V | GB/T 1299 |
USA | H10 | AISI |
Germany | 1.2365 | DIN EN ISO 4957 |
France | 32CDV12-28 | NF A35-590 |
Japan | SKD7 | JIS G4404 |
Condition | Symbol | Hardness |
soft annealed | +A | ≤ 229 HB |
Physical Properties (Typical Values)
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Hardening (Quenching) Temperature: 1020–1050°C
Cooling Media: Oil, high-pressure gas (N₂), air, or salt bath/hot bath at 500–550°C
Hardness After Quenching: ≥ 47 HRC
Tempering Temperature: 540–620°C (preferred range to achieve 44–50 HRC hardness)
Application | Use |  |
Die-casting dies | Especially for non-ferrous heavy metals like copper alloys and brass. | |
Hot forging dies | Forging dies, die inserts, hot punches. | |
Extrusion tools | Extrusion dies, backup pads, piercing mandrels for heavy metals (Cu, brass). | |
Hot shearing & trimming tools | Hot shear blades, trimming dies. |
100% compliant with ISO 4957:2018; EN 10204 3.1/3.2 test certificates provided.
Open-die forging + optimized heat treatment delivers consistent core-to-surface properties, with high hardenability maintained in large sections (>500 mm).
Unique heat number per batch; complete traceability throughout the entire production process.
Available in round bars (Ø20–800 mm), billets, blocks, and custom-shaped forgings.
