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Steel Bolts - ASTM Grades

ASTM steel bolts - proof and tensile strength.

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ASTM Designation	Size Range (in)	Minimum Proof Strength (10³ psi)	Minimum Tensile Strength (10³ psi)	Material
A307	1/4 - 4			Low carbon steel
A325 type 1	1/2 - 1 1 1/8 - 1 1/2	85 74	120 105	Medium carbon steel, Q & T
A325 type 2	1/2 - 1 1 1/8 - 1 1/2	85 74	120 105	Low carbon martensite steel, Q & T
A325 type 3	1/2 - 1 1 1/8 - 1 1/2	85 74	120 105	Weathering steel, Q & T
A354 grade BC				Alloy steel, Q & T
A354 grade BD	1/4 - 4	120	150	Alloy steel, Q & T
A449	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	1/2 - 1 1/2	120	150	Alloy steel, Q & T
A490 type 3				Weathering steel, Q & T

1 psi (lb/in²) = 6895 Pa (N/m²)
1 inch = 25.4 mm

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