stainless steel characteristics

Publish Time: 2019-10-12 Origin: Site

Currently, there are mainly stainless steels on the market.

302HQ (0Cr18Ni9Cu3) - mainly used for self-tapping screws;

SUS304 (0Cr18Ni9) - also known as A2, mainly used for the manufacture of ordinary stainless steel bolts, screws, washers, nuts, the strength of the general bolt is 70;

SUS 316 (0Cr18Ni12Mo2), SUS 316L (00Cr17Ni14Mo2) - also known as A4 is mainly used for the manufacture of high corrosion-resistant stainless steel bolts, screws,

washers, nuts, the strength grade is generally 70 bolts, can also reach high strength level 80 .

不锈钢种类	化学成分 in % Chemical Composition
Grade	C碳	Si硅	Mn锰	P磷	S硫	Cr铬	Mo钼	Ni镍
	max	max	max	max	max	max	max	max
SUS XM7	0,08	1,00	2,00	0,045	0,030	17,0-19,0		8,5-10,5
(302HQ)
SUS 304	0,08	1,00	2,00	0,050	0,030	17,0-20,0	-	8,0-13,0
A2
SUS 316	0,08	1,00	2,00	0,050	0,030	16,0-18,5	2,0-3,0	10,0-14,0
A4
SUS 316L	0,03	1,00	2,00	0,050	0,030	16,0-18,5	2,0-3,0	10,0-14,0

Mechanical properties of austenitic stainless steel bolts, screws and studs

	特性	组别	性能等级	螺纹直径	抗拉强度	降伏强度	断裂伸长率
类别					min N/mm2	min N/mm2	min N/mm2
奥氏体	软	A1 A2	50	< M39	500	210	0.6d
	冷加工	A2 A4	70	< M24	700	450	0.4d
	高强度	A4	80	< M24	800	600	0.3d

Mechanical properties of martensitic and ferritic stainless steel bolts, screws and studs

	组别	性能等级	螺纹直径	抗拉强度	降伏强度	断裂伸长率	硬度
类别							HV	HB	HRC
马氏体	C1	50	< M24	500	250	0,2d	147-209	-	155-220
		70		700	410	0,2d	209-314	20-34	220-330
		110 4)		1100	820	0,2d	-	36-45	350-440
	C3	80/td>	< M24	800	640	0.2d	228-322	21-35	240-340
	C4	50	< M24	800	640	0,2d	147-209	-	155-220
		70		700	410	0,2d	209-314	20-34	220-330
铁素体	F1 3)	45	< M24	450	250	0,2d	128-209	-	135-220
		60		600	410	0,2d	171-271	-	180-285

Destructive torque of austenitic stainless steel bolts and screws M1.6-M16 (coarse thread)

In accordance with the European International Industrial Standard ISO 3506

	破坏扭矩 Nm
螺纹	性能等级
	50	70	80
M 1.6	0.15	0.2	0.24
M 2	0.3	0.4	0.48
M 2.5	0.6	0.9	0.96
M 3	1.1	1.6	1.8
M 4	2.7	3.8	4.3
M 5	5.5	7.8	8.8
M 6	9.3	13	15
M 8	23	32	37
M 10	46	65	74
M 12	80	110	130
M 16	210	290	330

stainless steel characteristics

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