gearbox.standards.iso6336._materials

Material-group tables shared by the ISO 6336 factor functions.

STEELS_AND_PEARLITIC_IRONS = frozenset({MaterialType.NODULAR_CAST_IRON_PEARLITIC, MaterialType.BLACK_MALLEABLE_CAST_IRON, MaterialType.NORMALIZED_STEEL, MaterialType.THROUGH_HARDENED_STEEL})

Wrought steels and nodular/malleable irons whose factors follow the “through-hardened” rows.