Formadur 2738 Bar

Alternative and trade names
DIN EN ISO 40CrMnNiMo8-6-4, AISI P20+Ni, 1.2738
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Description

1.2738 (40CrMnNiMo8-6-4) plastic mould steel, hardness in as-delivered condition 280 to 325 HB. Good machinability, suitable for texturing, improved through hardening in comparison to Formadur 2711, good polishability.

Equivalent Materials

This material data has been provided by Deutsche Edelstahlwerke Specialty Steel (DEW).

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

Dimension

PropertyValue

Diameter

20.5 mm

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708.0 mm

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Mechanical

PropertyValueComment

Hardness, Brinell

280.0 - 325.0 [-]

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as-delivered condition

Hardness, Rockwell C

28.0 - 51.0 [-]

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Tensile strength

950.0 - 1095.0 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100 °C

0.0000111 1/K

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for 20°C to the mentioned temperature

200 °C

0.0000129 1/K

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for 20°C to the mentioned temperature

300 °C

0.0000134 1/K

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for 20°C to the mentioned temperature

400 °C

0.0000138 1/K

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for 20°C to the mentioned temperature

500 °C

0.0000142 1/K

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for 20°C to the mentioned temperature

600 °C

0.0000156 1/K

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for 20°C to the mentioned temperature

700 °C

0.0000149 1/K

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for 20°C to the mentioned temperature

Thermal conductivity

23 °C

34.5 W/(m·K)

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150 °C

33.5 W/(m·K)

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300 °C

32 W/(m·K)

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Chemical properties

PropertyValue

Carbon

0.4

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Chromium

1.9

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Manganese

1.5

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Molybdenum

0.2

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Nickel

1.0

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Silicon

0.30000000000000004

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Technological properties

Property
Application areas

Large plastic moulds, mould frames for plastic moulds and die casting moulds

Heat Treatment

Soft annealing: 710-740°C (Cooling in furnace) - Hardening: 840-870°C and quenching in oil or polymer