ASTM A307 Grade A Bolts, Stud Bolts, Threaded Rods

• Introduction
• Chemical Composition
• Mechanical Properties
• Compatible Nuts
• Marking Requirement

ASTM A307 Grade A Carbon Steel Bolting with minimum tensile of 60 ksi.

ASTM A307 Grade A is grade specification in carbon steel bolting for use in general purpose application. This grade covers hex headed bolts, stud bolts, threaded rods or any other bolting having a minimum tensile strength of 60 ksi.

ASTM A307 Grade A Chemical Composition

Element %	Grade A
Carbon, Max	0.29
Manganese, Max	1.20
Phosphorus, Max	0.04
Sulfur, Max	0.15

ASTM A307 Grade A Mechanical Properties

Grade	Tensile, ksi	Yield, min, ksi	Elongation, min, %
Grade A	60 min	--	18

Compatible Nuts specification for ASTM A307 Grade A Bolting

ASTM A307 Grade A		Washers
1/4" to 1-1/2"	1-5/8" to 4"
ASTM A563 A Hex	ASTM A563A Heavy Hex	ASTM F844

ASTM A307 Grade A Marking Requirement

Grade	Details
		Grade A	Grade A Bolts are marked or stamped with "307A" along with optional manufacturer's Initial or logo.