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ASTM A307 Grade A Hex Bolts

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    Negotiable

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  • Delivery term:

    The date of payment from buyers deliver within days

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    Beijing

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    Long-term effective

  • Last update:

    2021-11-23 14:31

  • Browse the number:

    265

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Ningbo Steel Bolt Co., Ltd
Contactaixin:

Contactaixin:

meos15064804(Mr.)  

Email:

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Area:

Beijing

 Address:

Panjiashan, Xiepu Town, Zhenhai, Ningbo, China
Website:

http://www.ningbo-bolts.com/ http://meos15064804.yz-bh.com/

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ASTM A307 Specification for carbon steel bolts, studs, threaded rods & similar externally fasteners with min 60 ksi tensile strength.

ASTM A307 specification covers the chemical and mechanical requirements for three grades (Grades A, B, and C) of carbon steel bolts, studs, threaded rods with minimum tensile requirement of 60 ksi. However Grade C has been replaced by ASTM F1554 Grade 36 Specification. A307 specification does not cover the requirements for machine screws, thread cutting/forming screws, mechanical expansion anchors, or other similar externally threaded fasteners. When tested, sampled specimens shall adhere to specified values for chemical composition, hardness, tensile strength, yield point, elongation, and dimensions.


Bolt Grades

Type

Description

Grade A

Bolts with a minimum tensile strength of 60 ksi, intended for general purpose applications.

Grade B

Bolts with a tensile strength between 60 to 100 ksi and intended for flanged joints in piping systems.

Grade C

Replaced with ASTM F1554 Grade 36 Specification


Chemical Composition

Element

Grade A

Grade B

Carbon

0.29

0.29

Manganese, max

1.20

1.20

Phosphorus, max

0.04

0.04

Sulfur, max

0.15

0.05


Mechanical Properties

Bolt Grade

Diameter, Inch

Tensile Strength, ksi

Elongation, %

Hardness, BHN

A

1/4 to 4, Inclusive

60

18

121 - 241

B

1/4 to 4, Inclusive

60 - 100

18

121 - 212


Recommended Nuts & Washers

Bolt Specification

Bolting Diameter, Inch

Nut Specification

Washer Specification

A307 Grade A

1/4 to 4, Inclusive

ASTM A563 Grade A

SAE

A307 Grade B

1/4 to 4, Inclusive

ASTM A563 Grade B

F436


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