astm a325
ASTM A325 represents a high-strength structural bolt specification widely used in construction and engineering applications. These bolts are manufactured from medium carbon steel and are available in three distinct types based on chemical composition: Type 1 (medium carbon steel), Type 2 (low carbon martensite steel), and Type 3 (weathering steel). ASTM A325 bolts are designed to provide superior tensile strength, ranging from 120,000 to 150,000 psi, making them ideal for structural connections in buildings, bridges, and other heavy-duty applications. The bolts undergo rigorous testing procedures to ensure compliance with strict dimensional tolerances and mechanical properties. They feature specific marking requirements on their heads to indicate manufacturer identification and type designation. These fasteners are zinc-coated or hot-dip galvanized to enhance corrosion resistance, particularly in exposed applications. The standard covers bolts with diameters from 1/2 inch to 1-1/2 inches, offering flexibility in various construction projects. Their superior clamping force and resistance to vibration make them essential in steel structure assembly, ensuring long-term structural integrity and safety.
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