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BS 970:1955 EN31 Steel - Specifications & Listings

BS 970:1955 EN31: High 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 Live on M-EX
100Cr6 EN ISO 683-17 International 10 listings, 8 RFQs →
AISI 52100 AISI USA 0 listings, 3 RFQs →
SUJ2 JIS Japan 3 listings, 3 RFQs →
GCr15 GB China 12 listings, 11 RFQs →
NF A35-551 100C6 NF A35-551 France 0 listings, 2 RFQs →
ShKh15 GOST Russia 2 listings, 0 RFQs →
STS3 KS Korea 2 listings, 0 RFQs →
UNI 100Cr6 UNI 11234 Italy 2 listings, 0 RFQs →
Market Snapshot

Sellers asking higher

Daily refresh · 07 Aug 2026

See Full Price Gap →
7D Offer Price
▲ +0.9%
15D Offer Price
▲ +0.9%
30D Offer Price
▲ +1.1%
Supply & Demand by FormSee Full Supply & Demand →
Round Bar →
Balanced
Flat Bar →
Supply, no demand
Hex Bar →
Supply, no demand
Forging →
Supply, no demand
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.
Surface:
Processing:

Active BS 970:1955 EN31 Listings on M-EX (For Sale)

BS 970:1955 EN31 Round Bar
1.600 MT
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BS 970:1955 EN31 Hex Bar
1.300 MT
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BS 970:1955 EN31 Hex Bar
1.800 MT
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BS 970:1955 EN31 Round Bar
2.700 MT
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BS 970:1955 EN31 Flat Bar
1.000 MT
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BS 970:1955 EN31 Round Bar
1.100 MT
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BS 970:1955 EN31 Flat Bar
0.700 MT
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BS 970:1955 EN31 Round Bar
1.400 MT
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BS 970:1955 EN31 Round Bar
4.200 MT
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BS 970:1955 EN31 Round Bar
5.700 MT
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BS 970:1955 EN31 Round Bar
6.000 MT
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BS 970:1955 EN31 Round Bar
1.700 MT
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BS 970:1955 EN31 Round Bar
1.800 MT
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BS 970:1955 EN31 Flat Bar
2.100 MT
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BS 970:1955 EN31 Round Bar
0.900 MT
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Buyer RFQs for BS 970:1955 EN31

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BS 970:1955 EN31 Round Bar
1.500 MT
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BS 970:1955 EN31 Round Bar
4.000 MT
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BS 970:1955 EN31 Round Bar
3.900 MT
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BS 970:1955 EN31 Round Bar
1.100 MT
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BS 970:1955 EN31 Round Bar
1.700 MT
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BS 970:1955 EN31 Round Bar
2.200 MT
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BS 970:1955 EN31 Round Bar
5.300 MT
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BS 970:1955 EN31 Round Bar
2.800 MT
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BS 970:1955 EN31 Round Bar
2.500 MT
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BS 970:1955 EN31 Round Bar
2.300 MT
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BS 970:1955 EN31 Round Bar
5.500 MT
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BS 970:1955 EN31 Round Bar
6.700 MT
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