Thread Milling

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
High tensile alloy steel High tensile alloy steel >250 >850 <12
High tensile alloy steel >55HRC High tensile alloy steel >55HRC >560 >2000