Tool steel
1.2379 / X153CrMoV12 / D2 tool steel
1.2379 is a cold-work tool steel. The EN designation is X153CrMoV12. AISI D2 is the American designation for the same family. Uddeholm Sverker 21 and Böhler K110 are documented trade names – not a copy of their catalogue text. High carbon and chromium give wear resistance; the material is more brittle than 1.2363. Typically soft annealed. INDUSTRISTÅL supplies round bar and flat bar, cuts to length and ships with EN 10204/3.1. The purchase is governed by W.Nr. and condition.
- Werkstoffnummer
- 1.2379
- EN designation
- X153CrMoV12
- AISI
- D2
- Trade names
- Sverker 21, K110
- Typical condition
- soft annealed
Typical applications
- Punches and cutting tools
- Cold work with high wear
- Long production runs
Delivery conditions
- soft annealed
Designations
- W.Nr.
- 1.2379
- EN standard
- X153CrMoV12
- AISI/SAE
- D2
- SS (Sweden)
- 2310
- UNS
- T30402
- JIS
- SKD11
- Group
- Tool steel
Mechanical properties
Cold-work tool steel – not a structural Rm
Typically soft annealed bar/flat bar. Hardening by the toolmaker.
| Tilstand | Typisk ramme | Bemærkning |
|---|---|---|
| Blødtglødet | max. ca. 255 HB | Det, stangen handles i |
| Efter hærdning | typisk 58–62 HRC | Ikke en attest, vi opfinder |
AISI D2 and X153CrMoV12 are the same family. Trade names such as Sverker 21 and K110 point here – W.Nr. 1.2379 is what appears on the certificate.
Chemical composition
Typical range for X153CrMoV12 (ladle analysis)
| Element | Range |
|---|---|
| C | 1.45–1.60 % |
| Si | 0.10–0.60 % |
| Mn | 0.20–0.60 % |
| P | max. 0.030 % |
| S | max. 0.030 % |
| Cr | 11.0–13.0 % |
| Mo | 0.70–1.00 % |
| V | 0.70–1.00 % |
AISI D2 is in the same family. The figures are the framework of the standard – not a copy of a manufacturer's data sheet.
Heat treatment
Hardened by the toolmaker. The bar is typically traded soft annealed.
1.2379, X153CrMoV12 and D2
Google and drawings use three names for the same cold-work family: 1.2379, X153CrMoV12 and AISI D2. Trade names such as Sverker 21 and K110 point here. We buy on W.Nr. and condition and write what the mill can carry on the 3.1 certificate. 1.2363 (A2) is the tougher choice when a D2 tool breaks rather than wears.
Sawing and machining
Sawing of bar and flat bar. We do not promise a hardening certificate the mill has not issued.
Certificates and documentation
EN 10204/3.1 as standard. Trade name and W.Nr. must agree on the certificate.
Dimension programme
| Form | Range | Note |
|---|---|---|
| Round bar | Ø20–200 mm | Soft-annealed cold-work steel. Bought by W.Nr., not a Ø promise. |
| Flat bar | Flat 10–80 mm typically | Sawn. Sverker/K110 are trade names. |
| Plate | To order | Not structural plate. |
Parts of the range are held by European partners; other dimensions can be sourced. The range is not a current stock status in every diameter — stock is confirmed on enquiry.
Frequently asked questions
- What is 1.2379?
- 1.2379 is a cold-work steel, X153CrMoV12. AISI D2. Sverker 21 and K110 are common trade names.
- What is the difference between 1.2379 and 1.2363?
- 1.2379 wears better and is more brittle. 1.2363 is tougher, for when the tool breaks rather than wears.
- Can you supply 1.2379 round bar?
- Yes, as round bar and flat bar. State dimension and condition. Not a structural round bar in Ø580.
- Is D2 the same as 1.2379?
- AISI D2 is in the same family as 1.2379 / X153CrMoV12. The certificate carries the EN name and W.Nr. the mill has issued – not “D2 tool steel” as a substitute.
- Can 1.2379 be supplied cut to length?
- Yes. We cut bar and flat bar to your length and ship with 3.1. Hardening is typically carried out by the toolmaker.
Read more
Looking for 1.2379 / D2?
State dimension, length, quantity and condition – and any trade name the drawing specifies. We cut to length and ship with EN 10204/3.1.