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BS 4659 BO2 vs EN ISO 683-17 100Cr6

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

BS 4659 BO2 (BS 4659:1989) and EN ISO 683-17 100Cr6 (EN ISO 683-17:2014) are both steel grades. Both fall under the Tool & Die Steels category. BS 4659 BO2 is typically used for taps, drills, reamers, punches, gauges, while EN ISO 683-17 100Cr6 is commonly used for rolling element bearings, precision components, cold work tooling. BS 4659 BO2 is defined under British Standards (BS), originating from United Kingdom, while EN ISO 683-17 100Cr6 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 4659 BO2 vs EN ISO 683-17 100Cr6 is a 73.8% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With BS 4659 BO2:
GOST 5950 4H5MFS1 AISI 52100 EN ISO 4957 1.2316 DIN EN ISO 4957 1.2379 DIN EN ISO 4957 1.2344 GB/T 1299 3Cr2W8V GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV GOST 5950 4H5MFS GB/T 1299 4Cr5MoSiV1 IS 1570 (Part 6) 55T8 IS 1570 (Part 6) 50T8
Match Breakdown
CHEMISTRY MATCH
73.8%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property BS 4659 BO2 EN ISO 683-17 100Cr6
Standard BS 4659:1989 EN ISO 683-17:2014
Category Tool & Die Steels Tool & Die Steels
C (%) 0.85–0.95 0.93–1.05
Mn (%) 1.40–1.80 0.25–0.45
Cr (%) ≤0.30 1.35–1.65
Si (%) ≤0.30 0.15–0.35
S (%) Not specified ≤0.025
P (%) Not specified ≤0.025
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 4659 BO2 EN ISO 683-17 100Cr6
Hardness HRC (hardened) 57–62 Not specified
Hardness HB (annealed) ≤217 Not specified
Tensile Strength Not specified ≥620 MPa (annealed)
Hardness HRC Not specified 60–66 (hardened)
Hardness HB Not specified 179–217 (annealed)
Typical Applications
BS 4659 BO2
Taps, drills, reamers, punches, gauges
EN ISO 683-17 100Cr6
Rolling element bearings, precision components, cold work tooling
Key Differences
Can BS 4659 BO2 Be Substituted With EN ISO 683-17 100Cr6?
BS 4659 BO2 and EN ISO 683-17 100Cr6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
BS 4659 BO2
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3100–3500 mm (122.05–137.8 in)
EN ISO 683-17 100Cr6
Round Bar → (18 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3000–6500 mm (118.11–255.91 in)
On M-EX Right Now
BS 4659 BO2
2 active listings and RFQs →
EN ISO 683-17 100Cr6
18 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 4659 BO2 and EN ISO 683-17 100Cr6?
EN ISO 683-17 100Cr6 specifies S, P which are not specified for BS 4659 BO2.
Can BS 4659 BO2 be substituted with EN ISO 683-17 100Cr6?
BS 4659 BO2 and EN ISO 683-17 100Cr6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.