Material requirements for bolts

Publish Time: 2022-04-06 Origin: Site

Material requirements for bolts
Performance level	Materials and Heat treatment	Chemical composition					Tempering temperature
		C		P	S	B 1)	℃
		min	max	max	max	max	Min
3.6 2)	Carbon steel	一一	0.2	0.05	0.06	0.003	一一
4.6 2)		一一	0.55	0.05	0.06	0.003	一一
4.8 2)		一一	0.55	0.05	0.06	0.003	一一
5.6		0.13	0.55	0.05	0.06	0.003	一一
5.8 2)		一一	0.55	0.05	0.06
6.8 2)		一一	0.55	0.05	0.06
6.8 2)	Low carbon alloy steels (such as boron, manganese and chromium), hardened and tempered or medium carbon steels, hardened and tempered	0.154)	0.04	0.035	0.035	0.003	425
6.8 2)		0.25	0.55	0.035	0.035	0.003	425
9.8	Low carbon alloy steels (such as boron, manganese and chromium), hardened and tempered or medium carbon steels, hardened and tempered	0.154）	0.35	0.035	0.035	0.003	425
9.8		0.25	0.55	0.035	0.035	0.003	425
10.95),6)	Low carbon alloy steels such as boron, manganese and chromium are hardened and tempered	0.154）	0.35	0.035	0.035	0.003	340
10.96)	Medium carbon steel, hardened and tempered or low. Medium carbon alloy steels (such as boron, manganese or chromium), quenched and tempered or alloy steels quenched and tempered	0.25	0.55	0.035	0.035	0.03	425
		0.204)	0.55	0.035	0.035	0.03
		0.20	0.55	0.035	0.035	0.003
10.96),8),9)	Alloy steel, hardened and tempered	0.28	0.5	0.035	0.035	0.003	380

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