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BS 970:1955 EN31 Steel — Specifications & Listings

BS 970:1955High carbon chromium bearing steel

Forms: Round Bar Flat Bar Hex Bar Forging Category: Alloy Steel
Grade Details
GradeBS 970:1955 EN31
StandardBS 970:1955
DescriptionHigh carbon chromium bearing steel
ApplicationsBall and roller bearings, gauges, dies
Equivalent / Similar Grades
Grade Standard Region
100Cr6 ISO International
AISI 52100 AISI USA
SUJ2 JIS Japan
GCr15 GB China
NF A35-551 100C6 NF A35-551 France
ShKh15 GOST Russia
STS3 KS Korea
UNI 100Cr6 UNI 11234 Italy
Chemical Composition (%)
C Si Mn Cr S P
0.90–1.20 0.10–0.35 0.25–0.45 1.00–1.60 ≤0.040 ≤0.040
Mechanical Properties
Tensile Strength 625–775 MPa (annealed)
Hardness (HRC) 60–64 (hardened)
Hardness (HB) 183–229 (annealed)
Typical Available Sizes
Round Bar 10mm – 150mm dia
Flat Bar 15×5mm – 100×25mm
Sizes are indicative. Contact seller for exact availability.

Active BS 970:1955 EN31 Listings on M-EX

BS 970:1955 EN31 Round Bar
2.300 MT
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BS 970:1955 EN31 Round Bar
1.200 MT
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BS 970:1955 EN31 Flat Bar
0.800 MT
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BS 970:1955 EN31 Hex Bar
1.700 MT
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BS 970:1955 EN31 Round Bar
0.900 MT
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BS 970:1955 EN31 Flat Bar
2.200 MT
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BS 970:1955 EN31 Hex Bar
1.000 MT
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BS 970:1955 EN31 Round Bar
1.300 MT
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BS 970:1955 EN31 Flat Bar
1.100 MT
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BS 970:1955 EN31 Hex Bar
1.400 MT
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