ASTM International - ASTM A739-90a(2000)
Standard Specification for Steel Bars, Alloy, Hot-Wrought, for Elevated Temperature or Pressure-Containing Parts, or Both
|Publication Date:||1 January 2000|
|ICS Code (Steels for pressure purposes):||77.140.30|
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 the standard. The values given in parentheses are for information only.