ASTM A325 Bolts, Type 1
Hex Cap Screw Mechanical and Performance Data
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A heavy hex bolt made of medium carbon steel. The bearing surface shall be flat and washer faced, and the point is chamfered. |
| Applications/Advantages | Commonly used in structural steel joints in heavy construction. |
| Material | Type 1 bolts shall be heat treated by quenching in a liquid medium from above the austenitizing temperature and then tempering by reheating to a temperature of at least 800 F. |
| Heat Treatment | Type 1 bolts shall be made from a carbon steel which conforms to the following chemical composition requirements--Carbon 0.25-0.58%; Manganese: 0.57% minimum; Phosophorus: 0.048% maximum; Sulfur: 0.058% maximum. |
| Hardness | 1/2" through 1" diameter,
inclusive: Rockwell C24-35 1-1/8" through 1-1/2" diameter, inclusive: Rockwell C19-31 |
| Proof Load | 1/2" through 1" diameter,
Inclusive: 85,000 psi 1-1/8" through 1-1/2" diameter, inclusive: 74,000 psi. |
| Yield Strength | 1/2" through 1" diameter,
Inclusive: 92,000 psi. minimum. 1-1/8" through 1-1/2" diameter, inclusive: 81,000 psi.minimum. |
| Tensile Strength | 1/2" through 1" diameter,
Inclusive:120,000 psi. minimum. 1-1/8" through 1-1/2" diameter, inclusive: 105,000 psi.minimum. |
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