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1.2311 (MCM)
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1.2316 (R65)

1.2312 (MCMS)

Plastic mould steel with additional sulphur, usually supplied in a quenched and

tempered condition. Polishable, better machinibility compared to 1.2311. Similar to AISI P20+S.

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Description

They are plastic mold steels delivered in pre-hardened condition. 1.2312 is preferred for better machinability.

Due to its sulfur content, 1.2312 is not suitable for patterning. 1.2738 should be preferred for molds where the

hardness is required to be almost at the same level until the core and for better gloss properties.

APPLICATION AREAS

APPLICATION AREAS

It can be processed to the finished size and used immediately

in the production of plastic molds and holders.

It is flame hardenable and suitable for nitration.

Technical Details

Technical Details

Chemical Composition

Code: 1.2312, MCMS 40CrMnNiMo8-6-4

Carbon

Chromium

Molybdenum

Manganese

Sulfur

C

Cr

Mo

Mn

S

0,40

1,90

0,20

1,50

0,05

Heat Treatment

Temperature

Cooling

Hardness

Soft Annealing

710 – 740 °C

Furnace

235 HB

Stress Relief Annealing

500 – 550°C

Furnace

Hardening

830 – 870°C

oil or hot bath 180 – 220°C

see tempering diagram

Mechanical Properties

Hardness

30 – 48

HRC

Physical Properties

Thermal Expansion Coefficient

12,1 – 12,7 / 12,3 – 13,5

1/K * 10-6

Thermal Conductivity (20°C)

39,6

W/mK

Density

7,85

g/cm3