Carbodur 6758 QT

Alternative and trade names
Carbodur 6758, 1.6758, 23MnNiCrMo5-4
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Description

1.6758 (23MnNiCrMo5-4) is mainly used for various chains in automotive accessories, Mechanical engineering and Mining.

Related Standards

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.

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Properties

General

PropertyValue

Density

7.8 g/cm³

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Dimension

PropertyValueComment

Diameter

63 mm

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max.

Mechanical

PropertyValueComment

Charpy impact energy, V-notch

60.0 J

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Elastic modulus

210 GPa

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Hardness, Brinell

210.0 - 275.0 [-]

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Depending on the delivery condition

Reduction of area

50.0 %

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Tensile strength

1130.0 - 1225.0 MPa

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Yield strength

1020.0 - 1100.0 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100 °C

0.0000115 1/K

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for 20°C to the mentioned temperature

200 °C

0.0000125 1/K

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for 20°C to the mentioned temperature

300 °C

0.0000133 1/K

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for 20°C to the mentioned temperature

400 °C

0.0000139 1/K

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for 20°C to the mentioned temperature

Specific heat capacity

430.0 J/(kg·K)

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Thermal conductivity

41.5 W/(m·K)

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Electrical

PropertyValue

Electrical resistivity

1.9e-07 Ω·m

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Chemical properties

PropertyValue

Aluminium

0.025 - 0.05 %

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Carbon

0.2 - 0.26 %

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Chromium

0.4 - 0.6000000000000001 %

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Copper

0.2

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Manganese

1.1 - 1.4 %

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Molybdenum

0.5 - 0.6000000000000001 %

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Nickel

0.9 - 1.1 %

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Nitrogen

0.012

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Phosphorus

0.02

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Silicon

0.25

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Sulfur

0.015

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Technological properties

Property
Application areas

It is used for various chains in Automotive accessories, Mechanical engineering and Mining.

Heat Treatment

Soft annealing: 650-720°C, Spheroidizing: 650-720°C, Quenching 850-890°C (Water), Tempering: Min.400°C (Air)

Hot forming

It is formable at 850-1100°C and should then cooled slowly.

Processing history

Quenched and Tempered

Welding

It is usually weldable.