Steels For Screws | Bolts and Studs | General Mechanical Properties

Steels For Screws, Bolts and Studs

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.