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BS 4659 BO2 Steel — Specifications & Listings

BS 4659British oil hardening cold work tool steel

Forms: Round Bar Category: Tool Steel
Grade Details
GradeBS 4659 BO2
StandardBS 4659
DescriptionBritish oil hardening cold work tool steel
ApplicationsTaps, drills, reamers, punches, gauges
Equivalent / Similar Grades
Grade Standard Region
O2 AISI USA
90MnCrV8 DIN Germany
SKS95 JIS Japan
GOST 9HF GOST 5950 Russia
GB/T 9CrWMn GB/T 1299 China
Chemical Composition (%)
C Mn Cr Si
0.85–0.95 1.40–1.80 ≤0.30 ≤0.30
Mechanical Properties
Hardness HRC (hardened) 57–62
Hardness HB (annealed) ≤217
Typical Available Sizes
Round Bar 8mm–150mm dia
Flat Bar 10×5mm–150×30mm
Sizes are indicative. Contact seller for exact availability.

Active BS 4659 BO2 Listings on M-EX

BS 4659 BO2 Round Bar
1.200 MT
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BS 4659 BO2 Round Bar
2.000 MT
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