BSI BS 3S 132 Specification for 3 % chromium-molybdenum-vanadium steel billets, bars, forgings and parts (1 320-1 470 MPa: limiting ruling section 70 mm) (suitable for nitriding) - AMD 2220: February 1977; AMD 3530: August 1981; AMD 14160: May 30, 2003
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