Alloy Steel ASTM A 320 Studs, Bolts and Rods

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Alloy Steel ASTM A 320 Studs, Bolts and Rods Specification

Product Type
Alloy Steel ASTM A 320 Studs, Bolts and Rods

Shape
Studs, Bolts, Rods (Threaded/Unthreaded)

Elongation
Minimum 16% in 50 mm for Grade L7

Strength
Tensile Strength: 105125 ksi (724862 MPa) for Grade L7

Hardness
217 Brinell Max (for Grade L7)

Resistance
Excellent resistance to corrosion, oxidation, and low temperature embrittlement

Grade
ASTM A320 (Grades: L7, L7M, B8, B8M, etc.)

Melting Range
1425C 1510C

Density
7.85 Gram per cubic centimeter(g/cm3)

Chemical Composition
Carbon, Manganese, Phosphorus, Sulfur, Silicon, Chromium, Molybdenum, Nickel (specific ASTM A320 grades: L7, B8, etc., contain varying percentages; e.g., typical L7: C 0.30%, Mn 0.401.35%, Si 0.35%, Cr 0.701.00%, Mo 0.150.25%)

Application
Low-temperature service, pressure vessels, valves, flanges, piping systems, heat exchangers, petrochemical and power plants

Color
Metallic Silver/Grey

Ambient Use Temperature
Suitable for temperatures down to -150°C (Grade L7)

Size Range
M6 to M100 or 1/4'' to 4'' (diameter); custom lengths available

Machinability
Good machinability and forging characteristics

Thread Type
Metric and Unified (UNC/UNF) as per client requirement

Packing
Wooden Boxes, Palletized, or as specified by customer

Finish
Plain, Black Oxide, Hot Dip Galvanized, Zinc Plated, PTFE Coated

Surface Treatment
Shot Blasted, Passivated, Phosphated

Tolerance
As per ASTM A320 and ISO tolerance standards

Standard
ASTM A320/A320M

About Alloy Steel ASTM A 320 Studs, Bolts and Rods

The Alloy Steel ASTM A 320 Studs, Bolts and Rods ASTM A320 Studs, Bolts and Nuts that we provide are stamped to withstand extreme condition because of it high grade material. We offer a wide range of ASTM A320 in varied sizes and thickness to ensure long functional life. They are used in varried industrial and commercial sectors and its quality is assured.

Engineered for Extreme Environments

ASTM A320 Alloy Steel fasteners are engineered to perform reliably in the harshest environments, including subzero temperatures and corrosive atmospheres. Special grades like L7 maintain mechanical integrity down to -150C, making them ideal for cryogenic and ambient-temperature applications. Each fastener delivers excellent resistance to embrittlement, oxidation, and wear, ensuring safety and longevity across diverse industrial sectors.

Versatile Finishes and Precision Tolerances

Clients can choose from a range of finishes-plain, black oxide, hot dip galvanized, zinc plated, or PTFE coated-to tailor each fastener's protective properties. The precision threading, available in both metric and unified types, ensures accurate fit and reliable assembly. ISO and ASTM A320 tolerance standards are strictly followed to guarantee performance in critical operations.

Applications Across Sectors

Alloy Steel ASTM A320 studs, bolts, and rods excel in pressure vessels, valves, flanges, piping systems, and heat exchangers. These components are essential in power generation, petrochemical, and other demanding industrial settings where temperature extremes and chemical exposure are routine. Their robust mechanical characteristics make them a preferred solution for manufacturers, exporters, and project engineers alike.

FAQ's of Alloy Steel ASTM A 320 Studs, Bolts and Rods:

Q: How are ASTM A320 Studs, Bolts, and Rods typically used in industrial applications?

A: These fasteners are primarily employed in pressure vessels, valves, flanges, piping systems, and heat exchangers, especially where low temperatures, high pressure, and corrosion resistance are critical. Their use extends to power plants, petrochemical industries, and other facilities requiring reliable and durable bolting solutions.

Q: What finishes and surface treatments are available for these fasteners?

A: Options include plain, black oxide, hot dip galvanized, zinc plated, and PTFE coated finishes. Surface treatments such as shot blasting, passivation, or phosphating are also available, enhancing corrosion resistance and preparing the fastener for specific environmental challenges.

Q: When should Grade L7 Alloy Steel fasteners be selected?

A: Grade L7 should be chosen for applications requiring reliable performance at temperatures as low as -150C. This grade offers high mechanical strength (105-125 ksi tensile) and excellent resistance to embrittlement, making it suitable for cryogenic and low-temperature environments.

Q: Where are custom sizes or lengths available for Alloy Steel ASTM A320 fasteners?

A: Custom diameters ranging from M6 to M100 or 1/4" to 4" and tailored lengths can be ordered directly from manufacturers, exporters, or suppliers, primarily based in India and serving both domestic and international markets. Packing options include wooden boxes or palletizing, as specified by the customer.

Q: What benefits do these fasteners offer regarding machinability and installation?

A: ASTM A320 fasteners exhibit good machinability and forging properties, making them easy to manufacture and install. Precision threading in both metric and UNC/UNF options ensures compatibility and secure assembly in various industrial setups.

Q: How is the quality of Alloy Steel ASTM A320 fasteners ensured during the manufacturing process?

A: Manufacturing strictly adheres to ASTM A320/A320M and ISO tolerance standards, ensuring each fastener meets stringent mechanical and chemical composition requirements. Quality assurance includes thorough inspection, specified surface treatments, and standardized packing to guarantee product integrity during transit and installation.

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