Formadur 320

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Description

Tempered mould steel with improved quenching and tempering properties, good machinability, polishable, weldable and can be textured. This grade offers substantial improvements, especially for building larger and complex moulds. Specific modifications of the grade's components as well as additional smelting and secondary metallurgy ensure Formadur® 320's outstanding properties.

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

Mechanical

PropertyValueComment

Hardness, Brinell

280.0 - 385.0 [-]

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as-delivered condition, (280-325, 310-355 HB)

Hardness, Rockwell C

28.0 - 51.0 [-]

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Tensile strength

1060.0 - 1190.0 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

0.0000135 1/K

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for 20°C to the mentioned temperature

500 °C

0.0000138 1/K

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for 20°C to the mentioned temperature

600 °C

0.0000141 1/K

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for 20°C to the mentioned temperature

700 °C

0.0000143 1/K

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for 20°C to the mentioned temperature

Thermal conductivity

23 °C

36 W/(m·K)

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150 °C

37.4 W/(m·K)

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300 °C

33 W/(m·K)

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Chemical properties

PropertyValue

Carbon

0.34

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Chromium

1.7000000000000002

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Manganese

0.8

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Molybdenum

0.4

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Nickel

0.5

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Silicon

0.4

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Technological properties

Property
Application areas

Large-format plastic injection and extrusion moulds with deep engraving and high demands on core strength, large mould frames

Heat Treatment

Soft annealing: 710-740°C (Cooling in furnace) - Hardening: 820-850°C and quenching in oil or polymer