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BS 4659 BH11 vs EN ISO 4957 X40CrMoV5-1

Strong Match — 91.4% match based on chemical composition and mechanical property overlap.

BS 4659 BH11 (BS 4659:1989) and EN ISO 4957 X40CrMoV5-1 (EN ISO 4957:2018) are both steel grades. Both fall under the Tool & Die Steels category. BS 4659 BH11 is typically used for die casting dies, extrusion tooling, while EN ISO 4957 X40CrMoV5-1 is commonly used for die casting dies, extrusion dies, forging dies, hot shear blades. BS 4659 BH11 is defined under British Standards (BS), originating from United Kingdom, while EN ISO 4957 X40CrMoV5-1 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 4659 BH11 vs EN ISO 4957 X40CrMoV5-1 is a 87.1% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 91.4%.

Frequently Compared With BS 4659 BH11:
GOST 5950 4H5MFS1 DIN EN ISO 4957 1.2344 GB/T 1299 4Cr5MoSiV GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS EN ISO 4957 1.2316 DIN EN ISO 4957 1.2379 GOST 5950 3H2W8F GB/T 1299 3Cr2W8V AISI 52100 EN ISO 683-17 100Cr6 IS 1570 (Part 6) 118T3
Match Breakdown
CHEMISTRY MATCH
87.1%
MECHANICAL MATCH
100%
OVERALL
91.4%
Specifications
Property BS 4659 BH11 EN ISO 4957 X40CrMoV5-1
Standard BS 4659:1989 EN ISO 4957:2018
Category Tool & Die Steels Tool & Die Steels
C (%) 0.33–0.43 0.35–0.42
Si (%) 0.80–1.20 0.80–1.20
Mn (%) 0.20–0.50 0.30–0.50
Cr (%) 4.75–5.50 4.75–5.50
Mo (%) 1.10–1.60 1.20–1.50
V (%) 0.30–0.60 0.85–1.15
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 BH11 EN ISO 4957 X40CrMoV5-1
Hardness HRC (hardened) 40–54 42–54
Hardness HB (annealed) ≤235 ≤235
Hot Strength Not specified Excellent to 600°C
Typical Applications
BS 4659 BH11
Die casting dies, extrusion tooling
EN ISO 4957 X40CrMoV5-1
Die casting dies, extrusion dies, forging dies, hot shear blades
Can BS 4659 BH11 Be Substituted With EN ISO 4957 X40CrMoV5-1?
BS 4659 BH11 and EN ISO 4957 X40CrMoV5-1 overlap closely enough on chemistry and mechanical properties that EN ISO 4957 X40CrMoV5-1 is often considered as a substitute for BS 4659 BH11 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
BS 4659 BH11
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3500–3500 mm (137.8–137.8 in)
EN ISO 4957 X40CrMoV5-1
Round Bar → (3 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2600–4800 mm (102.36–188.98 in)
On M-EX Right Now
BS 4659 BH11
2 active listings and RFQs →
EN ISO 4957 X40CrMoV5-1
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 4659 BH11 and EN ISO 4957 X40CrMoV5-1?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 4659 BH11 be substituted with EN ISO 4957 X40CrMoV5-1?
BS 4659 BH11 and EN ISO 4957 X40CrMoV5-1 overlap closely enough on chemistry and mechanical properties that EN ISO 4957 X40CrMoV5-1 is often considered as a substitute for BS 4659 BH11 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.