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Cast steel products cover many steel qualities from structural steel to high alloyed steel.
The compositions available often corresponds to compositions available as wrought or forged steels but are specified in specific standards as the testing differs from the testing of wrought and forged products.
Generally steel castings of a certain composition are expected to have lower strength and elongation compared to wrought or forged products of similar composition. This is due to the coarser grain size and inhomogeneous structure even though the heat treatment has been carried out correctly.
Low alloy steel like 34CrNiMo6, Mat No. 1.6582, can be used in wrought, in forged and as cast material.
The material and mechanical properties are specified in the standards referred to below. The individual standard specifies the heat treated condition needed to obtain the mechanical properties. The mechanical properties may change with dimension.
Semi finished product, bar stock and slabs
EN 10083-1: Quenched and tempered steels Part 1: Thenical delivery specifications for special steels.
EN 10250-3: Open die steel forgings for general engineering purposes - Part 3: Alloy special steels.
DIN 17205: Quenched and tempered steel castings for general purposes: Technical delivery conditions.
Bar stock x 200 etched in Nital
As delivered according to EN 10083-1
Structure: tempered Martensite and some retained Austenite
Heat treatment: Oil quench & temper
Hardness: HV=295-355; t<100 mm
Casting x 200 etched in Nital
As delivered according to DIN 17 205
Structure: Coarse grained ferritic-pearlitic structure.
Heat treatment: Normalize & temper.
Hardness: HV=250-290; t<150 mm.