Aircraft Steel BS S106 / 4S106D (MSRR 6001)

Technical Data Sheet

BS s106 is the British aerospace equivalent of 722M24 / EN40B. It is a medium strength 3% Chrome-Moly nitriding steel that develops high hardness after heat treatment, and is used in both aerospace applications and motorsports industries. It is generally supplied as bright bar in the hardened, tempered and stress relieved condition, designated S106D. It can also be supplied to the Rolls Royce specification MSRR 6001.

Chemical Composition Limits
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Sn
3S106	0.20-0.28	0.10-0.35	0.40-0.70	0.020	3.00-3.50	0.45-0.65	0.30 max	0.030 max
4S106	0.20-0.28	0.10-0.35	0.40-0.70	0.020	3.00-3.50	0.50-0.70	0.30 max	0.030 max
Chemically similar British Specifications BS.970 Pt2
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	-
722M24	0.20-0.28	0.10-0.35	0.45-0.70	0.025	3.00-3.50	0.45-0.65	-	-
EN40B	0.20-0.30	0.10-0.35	0.40-0.65	0.050	2.90-3.50	0.40-0.70	0.40 max	-
Other Chemically similar Specifications
Weight%	C	Si	Mn	P+S max	Cr	Mo	Ni	Sn
WS 1.7365	0.25-0.30	0.15-0.25	0.60-0.80	0.035 max	3.00-3.30	0.45-0.550	-	-

Typical Mechanical Properties

Grade	Treatment	Tensile Strength Rm N/mm²	Proof Stress Rp 0.2, N/mm²	Elongation in 5.65 √Cross Sectional Area%	Hardness HB	Ruling Section
S106	Solution Annealed	-	-	-	269 max	-
S106D	Hardened and Tempered	930/1080	740	35	269/321	6"

Availability
Alloy S106 is available in Bar . For all stock availability contact Sales.

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Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.