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.
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.
|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|