BS 4659:1989 BO2 Steel: Specifications & Listings

BS 4659:1989 BO2: British oil hardening cold work tool steel

Forms: Round Bar Category: Tool & Die Steels
Grade Details
GradeBS 4659:1989 BO2
Standard BS 4659:1989
ApplicationsTaps, drills, reamers, punches, gauges
Most Active InNorth (Punjab)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
ASTM A681 O2 ASTM A681:2008 USA (ASTM) 3 listings, 3 RFQs →
EN ISO 4957 90MnCrV8 EN ISO 4957:2018 Europe 3 listings, 0 RFQs →
GB/T 1299 9CrWMn GB/T 1299-2014 China 2 listings, 0 RFQs →
Supply & Demand by FormSee Full Supply & Demand →
Round Bar →
Low Activity
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 1570 (Part 6) T80V2 IS 1570 (Part 6):1996 Related Material
IS 1570 (Part 6) T90V2 IS 1570 (Part 6):1996 Related Material
IS 1570 (Part 6) T103V2 IS 1570 (Part 6):1996 Related Material
IS 1570 (Part 6) T55Si7 IS 1570 (Part 6):1996 Related Material
SAE J404 1330 SAE J404:2009 Related Material
CSA G40.21 350WT CSA G40.21-13 (R2023) Related Material
IS 1570 (Part 4) 36Si7 IS 1570 (Part 4):1988 Related Material
IS 4367 36Si7 IS 4367:1991 Related Material
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
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.

Popular forms for this grade:

Round Bar (2)

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BS 4659:1989 BO2 Round Bar
1.100 MT
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BS 4659:1989 BO2 Round Bar
2.400 MT
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