BS 970:1991 534A99 Steel — Specifications & Listings

BS 970:1991

534A99 is a nickel-chromium-molybdenum alloy steel developed for high strength and toughness requirements. It maintains good fatigue resistance under dynamic loading.

Category: Alloy Steel

Grade Details

Grade	BS 970:1991 534A99
Standard	BS 970:1991
Description	534A99 is a nickel-chromium-molybdenum alloy steel developed for high strength and toughness requirements. It maintains good fatigue resistance under dynamic loading.
Applications	Used for aircraft fittings, gears, high-strength shafts, crankshafts, heavy-duty fasteners, and transmission parts.

Chemical Composition (%)

C	Mn	Si	Ni	Cr	Mo	S	P
0.36-0.44	0.45-0.70	0.10-0.35	1.30-1.80	1.00-1.40	0.20-0.35	0.040 max	0.040 max

Mechanical Properties

tensile_strength	900-1100 MPa
yield_strength	700-900 MPa
elongation	10-14%
hardness	269-331 HB

Active BS 970:1991 534A99 Listings on M-EX

No active BS 970:1991 534A99 listings at this time.