Standard Specification for Steel Bars, Alloy, Hot-Wrought, for Elevated Temperature or Pressure-Containing Parts, or Both
Standard Specification for Steel Bars, Alloy, Hot-Wrought, for Elevated Temperature or Pressure-Containing Parts, or Both
ABSTRACT This specification covers hot-wrought, ferritic alloy steel bars for elevated temperature or pressure-containing parts suitable for fusion welding or both. The bars are furnished in two grades: Grade B 11 and Grade B 22. The steel shall be made by on or more of the following primary processes: open-hearth, basic-oxygen, or electric furnace. The bars shall be normalized and tempered. The heat analysis shall conform to the limits for chemical composition specified. The bars as represented by the test specimen shall conform to the tensile requirements specified. SCOPE 1.1 This specification2 covers hot-wrought, ferritic alloy steel bars for elevated temperature or pressure-containing parts suitable for fusion welding or both. 1.2 The bars are furnished in the following grades: Grade B 11: 1.25 % chromium, 0.55 % molybdenum Grade B 22: 2.25 % chromium, 1.00 % molybdenum 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM A739-90a(2022) is a widely recognized standard specification from ASTM International that covers hot-wrought, ferritic alloy steel bars. These steel bars are specifically designed for elevated temperature or pressure-containing parts and are suitable for fusion welding or both. The specification includes two grades, Grade B 11 and Grade B 22, each characterized by specific chromium and molybdenum content. The standard outlines the manufacturing processes, chemical composition requirements, mechanical properties, and the methods for testing and certification. ASTM A739-90a(2022) ensures consistency, reliability, and safety for steel bars used in demanding industrial environments.
Applicable Grades:
Manufacturing Processes:
Heat Treatment:
Chemical Requirements:
Mechanical Properties:
Workmanship:
Certification & Documentation:
Другие стандарты ASTM
ASTM A739-90a(2022) ferritic alloy steel bars are used in a broad range of industrial applications where materials must withstand high temperatures or internal pressures. Key sectors and uses include:
This standard helps manufacturers, fabricators, and engineers ensure that steel bars used in critical environments meet rigorous performance, safety, and durability expectations.
For comprehensive material selection and specification, consider referencing the following related standards:
ASTM A739-90a(2022) aligns with international standardization principles, ensuring global compatibility and quality. For further details or to obtain the full specification, visit ASTM International.
Keywords: ASTM A739, alloy steel bars, hot-wrought steel, elevated temperature, pressure-containing parts, ferritic alloy, industrial standards, mechanical properties