Everything You Need to Know About A307 Bolts

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The ASTM A307 standard specifies the chemical and mechanical properties of three types of carbon steel bolts, studs, and threaded rods with a minimum tensile strength of 60 ksi. However, ASTM F1554 Grade 36 Specification has taken the position of Grade C. Machine screws, thread cutting/forming screws, mechanical expansion anchors, and other related externally threaded fasteners are not covered by the A307 specification. Sampled specimens must meet specified chemical composition, hardness, tensile strength, yield point, elongation, and dimension requirements when tested. Check out A307 Bolts

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ASTM A307 Grade A is a material specification for medium-strength carbon steel fasteners, such as bolts, studs, and threaded rods, that are used in general-purpose applications. Grade A is a hot-dip galvanized carbon steel bolting material having a minimum tensile strength of 60 ksi and a hardness range of 121 to 241 BHN. For Grade A Bolts, the ASTM A307 specification addresses chemical composition, mechanical qualities, hardness, heat-treatment, and suggested nuts-washers.

 

ASTM A307 Bolts Types

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For a wide range of general-purpose applications, Grade A – headed bolts, threaded rods, and bent bolts with a minimum tensile strength of 60 ksi. Check out A307 Steel

Grade B – for flanged joints in piping systems with cast iron flanges, strong hex bolts and studs with a tensile strength of 60 to 100 ksi.

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