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Steels

  Hardeness
(HB) 		Resistance
RM (N/mm2)		 Extension
A (%)
Free-cutting steel Free-cutting steel <200 <700 <10
Structural/ cementation steel Structural/ cementation steel <200 <700 <30
Carbon steels Carbon steels <300 <1000 <20
Alloy steels < 850 n/mm2 Alloy steels < 850 n/mm2 <250 <850 <30
Alloy steels hard./temp. > 850 - < 1150 N/mm2 Alloy steels hard./temp. > 850 - < 1150 N/mm2 >250 >850 <30
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