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EN31 Steel — Specifications & Listings

BS970 — High carbon chromium bearing steel

Forms: Round Bar Flat Bar Hex Bar Forging Category: Alloy Steel
Grade Details
GradeEN31
StandardBS970
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
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 EN31 Listings on M-EX

EN31 Round Bar
0.900 MT
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EN31 Round Bar
1.200 MT
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EN31 Round Bar
1.300 MT
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EN31 Flat Bar
1.000 MT
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EN31 Round Bar
1.300 MT
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EN31 Round Bar
2.300 MT
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EN31 Round Bar
2.000 MT
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EN31 Round Bar
1.900 MT
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EN31 Round Bar
2.200 MT
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EN31 Round Bar
2.100 MT
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