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Steel Bolts - ASTM Grades

ASTM steel bolts - proof and tensile strength.

Steel Bolts - ASTM Grades
ASTM DesignationHead MarkingSize Range
(in)
Minimum Proof Strength
(103 psi)
Minimum Tensile Strength
(103 psi)
Material
A307 ASTM steel bolt 1/4 - 4     Low carbon steel
A325 type 1 ASTM steel bolt 1/2 - 1
1 1/8 - 1 1/2
85
74
120
105
Medium carbon steel, Q & T
A325 type 2 ASTM steel bolt 1/2 - 1
1 1/8 - 1 1/2
85
74
120
105
Low carbon martensite steel, Q & T
A325 type 3 ASTM steel bolt 1/2 - 1
1 1/8 - 1 1/2
85
74
120
105
Weathering steel, Q & T
A354 grade BC ASTM steel bolt       Alloy steel, Q & T
A354 grade BD ASTM steel bolt 1/4 - 4 120 150 Alloy steel, Q & T
A449 ASTM steel bolt 1/4 - 1
1 1/8 - 1 1/2
1 3/4 - 3
85
74
55
120
105
90
Medium carbon steel, Q & T
A490 type 1 ASTM steel bolt 1/2 - 1 1/2 120 150 Alloy steel, Q & T
A490 type 3 ASTM steel bolt       Weathering steel, Q & T
  • 1 psi (lb/in2) = 6895 Pa (N/m2)
  • 1 inch = 25.4 mm

Related Topics

  • Fasteners

    Bolts, nuts and threaded rods - torque, tension and loads.
  • Mechanics

    The relationships between forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.

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