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BS 970:1991 817M40 Steel — Specifications & Listings

BS 970:1991British Ni-Cr-Mo alloy steel, successor to EN24

Forms: Round Bar Category: Alloy Steel
Grade Details
GradeBS 970:1991 817M40
StandardBS 970:1991
DescriptionBritish Ni-Cr-Mo alloy steel, successor to EN24
ApplicationsHigh tensile shafts, gears, crankshafts
Equivalent / Similar Grades
Grade Standard Region
EN24 BS970:1955 UK
AISI 4340 SAE USA
34CrNiMo6 DIN Germany
DIN 36CrNiMo4 DIN 17200 Germany
JIS SNCM439 JIS G4103 Japan
GOST 40HNM GOST 4543 Russia
GB/T 40CrNiMoA GB/T 3077 China
40NCD3 NF A35-552 France
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
Tensile Strength 850–1000 MPa
Yield Strength ≥680 MPa
Elongation ≥13%
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

BS 970:1991 817M40 Round Bar
3.000 MT
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BS 970:1991 817M40 Round Bar
3.400 MT
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