A193 vs A320

What is Astm A193?

ASTM A193 is a specification for bolts, studs, and other threaded fasteners made of high-strength, heat-resistant, and corrosion-resistant alloy steel. It is utilized in numerous industries, including oil and gas, petrochemical, energy generation, and transportation sectors.

The ASTM A193 standard covers a variety of bolt grades and sizes, including B7, B8, B8M, B16, and other specialized alloys. These fasteners are intended for use in high-pressure, high-temperature, and high-stress applications, and are typically paired with nuts and washers that meet the same specifications.

ASTM A193 also specifies manufacturing and testing requirements for fasteners, such as heat treatment, mechanical testing, and surface finish. This ensures that the fasteners adhere to high quality standards and can withstand the rigorous conditions of their intended applications.

What is Astm A320?

ASTM A320 is a standard for high-temperature, high-pressure, and low-temperature alloy steel bolting materials intended for use in pressure vessels, valves, flanges, and fittings. This specification covers a variety of bolting grades, including L7, L7M, L43, B8, B8M, B8 Class 2, B8M Class 2, B8T, and B8MT, which are intended for use in a variety of temperature and pressure conditions.

Typical applications for ASTM A320 bolting materials include the oil and gas industry, chemical and petrochemical plants, and power generation facilities. In cryogenic applications where low-temperature service is required, these components are also utilized.

The ASTM A320 standard includes requirements for the bolting materials' chemical composition, mechanical properties, heat treatment, and testing. This ensures that the materials used for bolting meet specific quality standards and can withstand the demands of their intended applications. In addition, the specification includes marking and identification requirements to ensure proper material traceability.

 

A193 vs A320

ASTM A193	ASTM A320
Bolting materials for high-pressure and high-temperature service	Bolting materials for high-temperature and low-temperature service
B7, B8, B8M, B16, and others	L7, L7M, L43, B8, B8M, B8 Class 2, B8M Class 2, B8T, and B8MT
Typically used in high-pressure, high-temperature, and high-stress applications	Used in high-temperature and low-temperature service, including cryogenic applications
Alloy steel, typically heat-resistant and corrosion-resistant	Alloy steel, typically heat-resistant and corrosion-resistant
High strength, able to withstand high stress and high temperature	High strength, able to withstand high temperature and low temperature
Heat treatment is required for most grades	Heat treatment is required for most grades
Mechanical testing and surface finish requirements	Mechanical testing and surface finish requirements
Marking and identification requirements to ensure traceability	Marking and identification requirements to ensure traceability