Steels generally used for metric screws, bolts and studs
Property Class
Size
Materials per DIN 1)
Materials per ANSI 1)
3.6 4.6
to M39
QSt 36-2 USt 38-2 UQSt 36-2 UQSt 38-2
1006 1010
4.8
to M16
QSt 36-2 QSt 38-2
1006 1010
5.6
to M39
Cq 22
1022
5.8
to M39
Cq 22 Cq 35
1022 1035
8.8
to M12
22B2 28B2 Cq 35
10B22 10B28 1035 (1038)
to M22
35B2 Cq 35 Cq 45 46 Cr 1
10B35 1035 (1038) 1045
over M24 to M39
34 Cr 4 37 Cr 4 46 Cr2
5132 5135
10.9
to M6
35B2 Cq 35
10B35 1035
over M6 to M18
34 Cr 4 41 Cr 4
5132 5140
to M39
41 Cr 4 34 CrMo 4 42 CrMo 4
5135 4137 4140
12.9
to M18
34 CrMo4 37 Cr 4 41 Cr 4
4137 5135 5140
to M24
42CrMo 4
4140
to M39
34 CrNiMo 6
4340
1) The above listed materials are generally used.? It is however up to the manufacturer’s discretion to use any other material providing the final product meets the specified chemical composition and mechanical property.
