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ASTM A354 Specification

ASTM A354 - Standard Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded Fasteners

This specification covers the chemical and mechanical requirements of quenched and tempered alloy steel bolts, studs, and other externally threaded fasteners. All fasteners shall be made from alloy steel conforming to the chemical composition requirements. Two levels of bolting strength are covered, designated Grades BC and BD. Selection will depend upon design and the stresses and service for which the product is to be used. Hardness, tensile strength, yield strength, elongation, and area reduction shall be tested to meet the requirements prescribed. It covers the chemical and mechanical requirements of quenched and tempered alloy steel bolts, studs, and other externally threaded fasteners 4 in. and under in diameter for application at normal atmospheric temperatures, where high strength is required and for limited application at elevated temperature.

ASTM A354 Grades

Type Description
Grade BC ASTM A354 Grade BC is similar to BD with little lower strength.
Grade BD ASTM A354 Grade BD should be considered for anchor bolts, threaded rods, other styles of headed bolts, and bolts larger than 1-1/2" diameter where similar mechanical properties are desired.

ASTM A354 Chemical Composition

Element Sizes
1/4" to 1-1/2" Above 1-1/2"
Carbon, max 0.30 - 0.53% 0.35 - 0.53%
Phosphorus, max 0.035% 0.035%
Sulfur, max 0.040% 0.040%

ASTM A354 Mechanical Properties

Type Size Tensile, min, ksi Yield, min, ksi Elongation, min, % Reduction of Area, min, %
Grade BC 1/4" to 2-1/2"
2-5/8" to 4"
125
115
109
99
16
16
50
45
Grade BD 1/4" to 2-1/2"
2-5/8" to 4"
150
140
130
115
14
14
40
40

ASTM A354 Bolt Marking

Type Marking Details
Grade BC Grade BC Bolts are marked or stamped with "354BC" along with optional manufacturer's Initial or logo.
Grade BD Grade BD Bolts are marked or stamped with "354BD" along with optional manufacturer's Initial or logo.

ASTM A354 Recommended Nuts & Washers

ASTM A354 Grade BC ASTM A354 Grade BD Washers
Plain Galvanized Plain
ASTM A563 Grade C Hex ASTM A563 Grade DH Heavy hex ASTM A563 Grade DH Heavy hex ASTM F436