■ Carbon and Alloy Steel Bolt & Nut				碳钢/合金钢紧固件

Description for Carbon and Alloy Steel Bolt & Nut

碳钢/合金钢紧固件描述

Chinese Standard   Bolt   Nut

ANSI/ASTM   Bolt   Nut

Type:		Machine Bolt   Stud Bolt   Full Thread Bolt		Hex Hut   Heavy Hex Hut		Machine Bolt   Stud Bolt   Full Thread Bolt		Heavy Hex Nut
Standard&Code:		GB5782-2000   GB5785-2000     GB901-1998      HG20613-97   HG20634-97   SH3404-96		GB6170-2000   GB6171-2000   GB6175-2000   GB6176-2000      HG20613-97   HG20634-97   SH3404-96		ANSI B18.2.1   ANSI B1.1		ANSI B18.2.2   ANSI B1.1
Material:		35#   35CrMoA   35CrMoA   25Cr2MoVA		25#   45#   30CrMo   30CrMo		ASTM A307 GR.B   ASTM A193 GR.B7   ASTM A193 GR.B7M   ASTM A320 GR.L7   ASTM A320 GR.L7M   ASTM A193 GR.B16		ASTM A194 GR.2H   ASTM A194 GR.2H   ASTM A194 GR.2HM   ASTM A194 GR.7   ASTM A194 GR.7M   ASTM A194 GR.7

Chemical Composition & Mechanical Properties of Carbon and Alloy Steel Bolt&Nut

碳钢/合金钢紧固件化学成份及机械性能

Spec. No. Grade		Chemical Compositions（max%） C Mn P S Si Cr Cu Mo Ni V	Mechanical Properties (min) Tensile (MPa) Yield (MPa) Elongation % Reduction % Impact Akv(J) Hardness (HB)

A307 - Carbon Steel Bolts and Studs, 60000PSI Tensile Strength

A193 - Alloy Steel and Stainless Steel Bolting Materials for High Temperature Service

A320 - Alloy Steel Bolting Materials for Low Temperature Service

A194 - Carbon and Alloy Steel Nuts for bolts for High Pressure and High Temperature Serice

B						0.040		0.050														415-690				18						≤212

B7		0.37- 0.49		0.65- 1.10		0.035		0.040		0.15- 0.35		0.75- 1.20				0.15- 0.25						860		720		16		50				≤321

B7M		0.37- 0.49		0.65- 1.10		0.035		0.040		0.15- 0.35		0.75- 1.20				0.15- 0.25						690		550		18		50				≤235

B16		0.36- 0.47		0.45- 0.70		0.035		0.040		0.15- 0.35		0.80- 1.15				0.50- 0.65				0.25- 0.35		860		725		18		50				≤321

L7		0.38- 0.48		0.75- 1.00		0.035		0.040		0.15- 0.35		0.80- 1.10				0.15- 0.25						860		725		16		50		27

L7M		0.38- 0.48		0.75- 1.00		0.035		0.040		0.15- 0.35		0.80- 1.10				0.15- 0.25						690		550		18		50		27		≤235

2H		≥0.40		1.00		0.040		0.050		0.04																						248-352

2HM		≥0.40		1.00		0.040		0.050		0.04																						159-237

7		0.37- 0.49		0.65- 1.10		0.040		0.040		0.15- 0.35		0.75- 1.20				0.15- 0.25																248-352

7M		0.37- 0.49		0.65- 1.10		0.040		0.040		0.15- 0.35		0.75- 1.20				0.15- 0.25																159-237

HG20613-97, HG20634-97, SH3404-96

35#

0.32- 0.40

0.50- 0.80

0.035

0.035

0.17- 0.37

0.25

0.25

0.25

830

660

12

≤321

35CrMoA

0.32- 0.40

0.40- 0.70

0.025

0.025

0.17- 0.37

0.80- 1.10

0.25

0.15- 0.25

0.30

830

660

13

234-321

25Cr2MoVA

0.22- 0.29

0.40- 0.70

0.025

0.025

0.17- 0.37

1.50- 1.80

0.25

0.25- 0.35

0.30

0.15- 0.30

830

660

15

245-321

25#

0.22- 0.30

0.50- 0.80

0.035

0.035

0.17- 0.37

0.25

0.25

0.25

≤352

45#

0.42- 0.50

0.50- 0.80

0.035

0.035

0.17- 0.37

0.25

0.25

0.25

≤352

30CrMo

0.26- 0.34

0.40- 0.70

0.035

0.035

0.17- 0.37

0.80- 1.10

0.30

0.15- 0.25

0.30

234-285