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BS 4659 BD2 vs ASTM A681 D4

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

BS 4659 BD2 (BS 4659:1989) and ASTM A681 D4 (ASTM A681:2008) are both steel grades. Both fall under the Tool & Die Steels category. BS 4659 BD2 is typically used for blanking dies, forming dies, thread rolling dies, while ASTM A681 D4 is commonly used for tools, dies and fixtures (clause 1.2). BS 4659 BD2 is defined under British Standards (BS), originating from United Kingdom, while ASTM A681 D4 is defined under ASTM International, originating from United States.

As per chemical composition, BS 4659 BD2 vs ASTM A681 D4 is a 80.7% match. As per mechanical properties, the match is 100%. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With BS 4659 BD2:
GB/T 1299 3Cr2W8V EN ISO 4957 1.2316 GB/T 1299 4Cr5MoSiV DIN EN ISO 4957 1.2379 AISI 52100 GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS EN ISO 683-17 100Cr6 DIN EN ISO 4957 1.2344 GOST 5950 3H2W8F IS 1570 (Part 6) 103T3 IS 1570 (Part 6) 133T3
Match Breakdown
CHEMISTRY MATCH
80.7%
MECHANICAL MATCH
100%
OVERALL
69.9%
Specifications
Property BS 4659 BD2 ASTM A681 D4
Standard BS 4659:1989 ASTM A681:2008
Category Tool & Die Steels Tool & Die Steels
C (%) 1.40–1.60 2.05-2.40
Mn (%) 0.20–0.60 0.10-0.60
Cr (%) 11.00–13.00 11.00-13.00
Mo (%) 0.70–1.20 0.70-1.20
V (%) 0.50–1.10 0.15-1.00
P (%) Not specified <=0.030
S (%) Not specified <=0.030
Si (%) Not specified 0.10-0.60
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 BD2 ASTM A681 D4
Hardness HRC (hardened) 58–62 Not specified
Hardness HB (annealed) ≤255 Not specified
Hardness Not specified <=255 HB
Condition Not specified Annealed (maximum Brinell hardness)
Typical Applications
BS 4659 BD2
Blanking dies, forming dies, thread rolling dies
ASTM A681 D4
Tools, dies and fixtures (clause 1.2)
Key Differences
Can BS 4659 BD2 Be Substituted With ASTM A681 D4?
BS 4659 BD2 and ASTM A681 D4 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 BD2
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2700–3000 mm (106.3–118.11 in)
ASTM A681 D4
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On M-EX Right Now
BS 4659 BD2
2 active listings and RFQs →
ASTM A681 D4
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Frequently Asked Questions
What is the difference between BS 4659 BD2 and ASTM A681 D4?
ASTM A681 D4 specifies P, S, Si which are not specified for BS 4659 BD2.
Can BS 4659 BD2 be substituted with ASTM A681 D4?
BS 4659 BD2 and ASTM A681 D4 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.