Active Standard ASTM A739 | Developed by Subcommittee: A01.15
Book of Standards Volume: 01.05
Historical (view previous versions of standard)
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.
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1.1 This specification 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A29/A29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
ICS Number Code 77.140.30 (Steels for pressure purposes)