Mat.No. 1.2312, DIN 40CrMnMoS8-6
Designation by Standards Mat. No. DIN EN AISI 1.2312 40CrMnMoS8-6 - - Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.40 0.40 1.50 1.90 0.20 - - - - Description Cold working tool steel. It is generally supplied hardened and tempered to 880-1080 N/mm2. Higher sulphur content proviedes good machinability at relatively high hardness.Possibility of nitriding. Steel has good polishability. Applications Tools for plastics processin...
Designation by Standards
Chemical Composition (in weight %)
Cold working tool steel. It is generally supplied hardened and tempered to 880-1080 N/mm2. Higher sulphur content proviedes good machinability at relatively high hardness.Possibility of nitriding. Steel has good polishability.
Tools for plastics processing and moulds for pressure die casting.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.83
Thermal conductivity [W/m.K]: 33.3
Electric resistivity [Ohm mm2/m]: 0.19
Specific heat capacity[J/g.K]: 0.46
Coefficient of Linear Thermal Expansion 10-6 oC-1
Continuous Cooling Transformation (CCT) Diagram
Time-Temperature Transformation (TTT) Diagram
Heat to 710-740oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 230.
Stress relieving to remove machining stresses should be carried out by heating to approx. 650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Harden from a temperature of 830-880oC followed by oil or quenching or warm bath quenching 180-220oC. Hardness after quenching is 51 HRC.
Tempering temperature: See the data bellow.
Tempering Temperature (oC) vs. Hardness (HRC)
Hot forming temperature: 1050-850oC.
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.