EN 1562 GJMW-350-4: Decarburized Annealed White Malleable Cast Iron for Industrial Applications

Material EN-GJMW-350-4 (former GTW-35-04 acc. to DIN 1692-82) is a white malleable cast iron which is used in electrical engineering for electric fittings and contact line components for rail vehicles, in machine engineering for roll carrier, roller suspension tracks as well as for fabric downholder for textile machines, for axle sleeves and nuts of agricultural machines, in construction trade for couplings in scaffolding, as wood connectors for roof framings, for components in scaffolding and concrete formwork as well as for water barriers and toggle nuts. Further application for hose couplings, gas meter fittings, hose clips for compressed air lines, de-aerator casings, for fittings as well as for steering units and fork heads for bicycles.

Properties

General

Property	Temperature	Value
Density	20.0 °C	7.3 - 7.8 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	20.0 °C	175 - 195 GPa
Hardness, Brinell	20.0 °C	230 [-]
Poisson's ratio	23.0 °C	0.27 [-]	Typical for Malleable Cast Iron
Shear modulus	23.0 °C	64 GPa	Typical for Malleable Cast Iron
Tensile strength	20.0 °C	270 - 360 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	23.0 °C	1E-5 - 1.4E-5 1/K	Typical for Malleable Cast Iron
Melting point		1120 °C	Typical for Cast Iron
Specific heat capacity	20.0 °C	460 - 500 J/(kg·K)
Thermal conductivity	20.0 °C	42 - 63 W/(m·K)

Electrical

Property	Temperature	Value
Electrical resistivity	20.0 °C	3E-7 - 4E-7 Ω·m

Chemical properties

Property	Value
Carbon	3 - 3.4 %
Manganese	0.4 - 0.6 %
Silicon	0.4 - 0.8 %
Sulfur	0.12 - 0.25 %

DIN 17440 Grade X3CrTi17: Heat-Treated, Corrosion-Resistant Steel for Pressure Vessels EN 10277-4 Grade 20MnCrS5 Steel – Soft‑Annealed, Peeled, and Ready for High‑Performance Applications

Metal