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ISO/TR 15608 Material Group 73

Material Group 73 ISO 15608: Malleable cast irons (unalloyed and low-alloyed);

Malleable cast iron

Malleable cast iron has been a reliable type of cast iron with a low silicon content. In the state of casting the whole amount of carbon is bound as carbide to the iron. The breaking structure is white and the material is brittle. This is called “malleable rough cast”. Malleable cast iron is given its final qualities by heat treatment. If the material is completely decarburised, we speak of “white malleable cast iron”, whereas it is called ‚black malleable cast iron’ if a certain amount of carbon remains in the material.

The material’s mechanical qualities are better than those of standard grey cast iron. White malleable cast iron is also well weldable.

Typical materials in group 73

NameNumberStandardsRemarks
EN-GJMB 300-6EN-JM1110EN 1562
EN 12516-4
EN-GJMB 350-10EN-JM1130EN 1562
EN 12516-4
EN-GJMB-450-6EN-JM1140EN 1562
EN-GJMB-500-5EN-JM1150EN 1562
EN-GJMB-550-4EN-JM1160EN 1562
EN-GJMB-600-3EN-JM1170EN 1562
EN-GJMB-650-2EN-JM1180EN 1562
EN-GJMB-700-2EN-JM1190EN 1562
EN-GJMB-800-1EN-JM1200EN 1562
Table: Typical materials