ASTM A320 L7 Stud Bolts

ASTM A320 L7 Stud Bolts

What are ASTM A320 L7 Stud Bolts?

A stud bolt is a fastener that is threaded on both its ends and is screwed permanently into a fixed device. The ASTM A320 L7 Stud Bolts is a material specification designed with excellent chemical composition and properties. The robust A320 L7 stud bolts have a chemical content of carbon, manganese, phosphorous, sulfur, silicon, boron, and vanadium. The L7 stud bolts also have a superior content of chromium, nickel, molybdenum, and titanium. This allows the bolts to work in higher temperature conditions. L7 studs showcase enhanced tolerance to corrosive affluents which is common in harsh environments.

The stud bolt L7 is designed in standard classes of A, B, C, and D. These bolts have a minimum tensile strength of 895mpa. The A320 Grade L7 Plain Stud Bolt has a minimum yield strength of 585mpa and can be elongated by 15%. These bolts are very versatile and have a minimum reduction area of 18%. The SA 320 Grade L7 Unc Stud Bolt is designed with a minimum hardness of 24 HRC Rockwell max.

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ASTM A320 L7 Stud Bolts Specifications

ASTM A320 L7 Stud Bolts Properties

ASTM A320 L7 Stud Bolts Hardness

A320 L7 threaded rod and L7 studs suppliers in UAE

What is the difference between L7 and L7M studs?

The A320 L7 Double End Stud Bolts and L7M bolts are manufactured from quenched or tempered alloy steel. The chemical composition of both these grades is identical but has some differences. The ASTM A320 L7 Threaded Studs are designed with higher strength in comparison to L7m bolts.

The ASTM A320 L7 Continuous Threaded Stud Bolts and nuts are marked as L7 on bolt heads and nuts. The L7 bolts and nuts are marked as L7M. The L7M bolt requires a hardness tested before use. The hardness test is not necessary for an A320 L7 Fully Threaded Studs.

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What does the M mean on L7 studs?

The M on the A320 Gr L7 Tap End Stud Bolts represents the metric thread of a bolt.

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What are the different threads on A320 L7 threaded rod?

The A320 L7 threaded rod is commonly designed in NPT, BSPP, BSPT, UN, parallel and tapered ends. The other three standard thread series of the L7 threaded rod is the coarse, fine, and 8-thread grade.

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Where are A320 L7 stud bolts used?

The ASTM A320 Gr L7 Shear Stud Bolt is engineered to work in harsh environmental conditions. These bolts are commonly seen in valves, flanges, pressure vessels, and fittings. The ASTM A320 Grade L7 Welded Stud Bolt is used for pharmaceutical equipment, heat exchangers, gas processing, and petrochemicals. They are also seen in seawater equipment, oil drilling, aircraft exhaust manifolds, etc.

A320 Gr L7 Tap End Stud Bolts and SA 320 Gr L7 Threaded Bar for Glycol Reboilers

What is a heat treated L7 stud bolt?

The heat treated SA 320 Gr L7 Threaded Bar is tempered and hardened at temperatures of 1100 degrees F. The heat treatment procedure on the SA 320 L7 Welding Studs is employed to dissolve coarse chromium carbide particles. This help enhances their corrosion resistance and hardness. ASTM A320 L7 carbon steel Stud Bolt that is heat treated helps give the bolts their desired mechanical and physical properties. The robust ASTM A 320 Gr L7 Threaded Stud Bolt helps reduce stress and prevent any distortion when in service.