1.2312 is a pre-hardened mould steel, 40CrMnMoS8-6, P20+S. Holdax and M201 are common trade names. The sulphur helps machining.

Is Holdax the same as 1.2312?

Holdax is Uddeholm's trade name in the P20+S/1.2312 family. The certificate must show the W.Nr. you have bought.

What is the difference between 1.2312 and 1.2311?

1.2312 / Holdax has raised sulphur. 1.2311 / Impax when sulphur is unwanted. Both belong to the P20 family.

Can you supply 1.2312?

Yes. State the dimension and that the condition must be pre-hardened, if that is on the drawing.

Tool steel

1.2312 / Holdax mould steel

1.2312 is a mould steel. The EN designation is 40CrMnMoS8-6. AISI P20+S. Uddeholm Holdax and Böhler M201 are documented trade names. Raised sulphur gives faster machining in the pre-hardened condition. 1.2311 / Impax is the sister grade without the raised sulphur. INDUSTRISTÅL supplies bar, cuts to length and ships with 3.1.

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Typical applications

Plastic moulds
Holders
Parts milled pre-hardened

Delivery conditions

pre-hardened

Designations

W.Nr.: 1.2312
EN standard: 40CrMnMoS8-6
AISI/SAE: P20+S
UNS: T51620
Group: Tool steel

Machinability and weldability

The sulphur is the reason 1.2312 mills faster than 1.2311.

Sawing and machining

Cutting to length. Pre-hardened material is machined at your end.

Certificates and documentation

EN 10204/3.1 as standard.

Dimension programme

Form	Range	Note
Round bar	Ø40–400 mm	P20+S / Holdax, pre-hardened mould steel.
Flat bar	Flat cut to order	State hardness if it must appear on the certificate.
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 1.2312?: 1.2312 is a pre-hardened mould steel, 40CrMnMoS8-6, P20+S. Holdax and M201 are common trade names. The sulphur helps machining.
Is Holdax the same as 1.2312?: Holdax is Uddeholm's trade name in the P20+S/1.2312 family. The certificate must show the W.Nr. you have bought.
What is the difference between 1.2312 and 1.2311?: 1.2312 / Holdax has raised sulphur. 1.2311 / Impax when sulphur is unwanted. Both belong to the P20 family.
Can you supply 1.2312?: Yes. State the dimension and that the condition must be pre-hardened, if that is on the drawing.