Tool Steel
D2 · 1.2379
Also known as X153CrMoV12 / SKD11 / Cr12Mo1V1
High-carbon high-chromium cold-work tool steel for dies and punches.
D2 (material 1.2379, X153CrMoV12) is a high-carbon high-chromium cold-work tool steel offering excellent wear resistance and good through-hardening. It is a standard choice for blanking and forming dies, punches, shear blades and thread rolling dies. Supplied as round bar, flat bar and forged block.
International equivalents.
The same steel by country and standard — near matches; mill certificate governs.
Chemical composition.
Indicative, % by weight per EN ISO 4957. Mill certificate governs.
| Element | % |
|---|---|
| C | 1.40 – 1.60 |
| Si | ≤ 0.60 |
| Mn | ≤ 0.60 |
| Cr | 11.0 – 13.0 |
| Mo | 0.70 – 1.00 |
| V | 0.70 – 1.00 |
Mechanical properties.
Indicative; depends on dimension and heat treatment.
Available forms.
Size range: Ø 10 – 400 mm
Typical applications.
- Blanking & forming dies
- Punches & shear blades
- Thread rolling dies
- Wear parts
FAQ.
What is D2?
D2 (material 1.2379, X153CrMoV12) is a high-carbon high-chromium cold-work tool steel offering excellent wear resistance and good through-hardening. It is a standard choice for blanking and forming dies, punches, shear blades and thread rolling dies. Supplied as round bar, flat bar and forged block.
Is D2 the same as X153CrMoV12?
Yes — D2 is the European (EN) designation, while X153CrMoV12, SKD11, Cr12Mo1V1 are the matching names used in other countries and standards (for example AISI/SAE in the USA, JIS in Japan, GB in China, former DIN in Germany). They are near equivalents and may differ slightly in chemistry; the mill certificate governs the exact specification.
What are the international equivalents of D2?
D2 corresponds to D2 (AISI), X153CrMoV12 (1.2379) (EN), SKD11 (JIS), Cr12Mo1V1 (GB). Equivalents are nearest matches by country/standard; the mill certificate governs the exact specification.
In which forms is D2 available?
D2 is supplied as Round bar, Flat bar, Block / forged, in Ø 10 – 400 mm.
What is D2 used for?
Typical applications include Blanking & forming dies, Punches & shear blades, Thread rolling dies, Wear parts.