BS 970:1991 817M40 Steel - Specifications, Equivalents & Listings

Forms: Round Bar Category: Alloy Steel

Grade Details

Grade	BS 970:1991 817M40
Standard	BS 970:1991
Description	British Ni-Cr-Mo alloy steel, successor to EN24
Applications	High tensile shafts, gears, crankshafts

Equivalent / Similar Grades

Grade	Standard	Region	Live on M-EX
EN24	BS970:1955	UK	14 listings, 22 RFQs →
AISI 4340	SAE	USA	17 listings, 15 RFQs →
34CrNiMo6	DIN	Germany	3 listings, 0 RFQs →
DIN 36CrNiMo4	DIN 17200	Germany	0 listings, 2 RFQs →
JIS SNCM439	JIS G4103	Japan	3 listings, 0 RFQs →
GOST 40HNM	GOST 4543	Russia	2 listings, 0 RFQs →
GB/T 40CrNiMoA	GB/T 3077	China	2 listings, 0 RFQs →
40NCD3	NF A35-552	France	2 listings, 0 RFQs →

Round Bar →

Balanced

Chemical Composition (%)

C	Mn	Cr	Mo	Ni
0.36–0.44	0.45–0.70	1.00–1.40	0.20–0.35	1.30–1.70

Mechanical Properties

Typical Available Sizes

Round Bar	20mm–350mm dia
Flat Bar	25×10mm–250×75mm

Sizes are indicative. Contact seller for exact availability.

Active BS 970:1991 817M40 Listings on M-EX (For Sale)

BS 970:1991 817M40 Round Bar

3.700 MT

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BS 970:1991 817M40 Round Bar

3.400 MT

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No open buyer requirements for BS 970:1991 817M40 at this time.