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BS 4659 BH21 vs EN ISO 4957 X30WCrV9-3

Strong Match — 93.2% match based on chemical composition and mechanical property overlap.

BS 4659 BH21 (BS 4659:1989) and EN ISO 4957 X30WCrV9-3 (EN ISO 4957:2018) are both steel grades. Both fall under the Tool & Die Steels category. BS 4659 BH21 is typically used for hot extrusion dies, brass/bronze forging dies, while EN ISO 4957 X30WCrV9-3 is commonly used for hot extrusion dies, hot forging dies for non-ferrous metals. BS 4659 BH21 is defined under British Standards (BS), originating from United Kingdom, while EN ISO 4957 X30WCrV9-3 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 4659 BH21 vs EN ISO 4957 X30WCrV9-3 is a 89.7% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 93.2%.

Frequently Compared With BS 4659 BH21:
GB/T 1299 3Cr2W8V GOST 5950 4H5MFS1 EN ISO 4957 1.2316 GOST 5950 3H2W8F GOST 5950 4H5MFS AISI 52100 EN ISO 683-17 100Cr6 DIN EN ISO 4957 1.2379 DIN EN ISO 4957 1.2344 GB/T 1299 4Cr5MoSiV1 GB/T 1299 4Cr5MoSiV IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
89.7%
MECHANICAL MATCH
100%
OVERALL
93.2%
Specifications
Property BS 4659 BH21 EN ISO 4957 X30WCrV9-3
Standard BS 4659:1989 EN ISO 4957:2018
Category Tool & Die Steels Tool & Die Steels
C (%) 0.26–0.36 0.26–0.36
Mn (%) 0.15–0.40 0.15–0.40
Cr (%) 3.00–3.75 2.50–3.50
W (%) 8.50–10.00 8.50–10.00
V (%) 0.30–0.60 0.30–0.60
Si (%) Not specified 0.15–0.50
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 BH21 EN ISO 4957 X30WCrV9-3
Hardness HRC (hardened) 36–54 38–52
Hardness HB (annealed) ≤229 ≤229
Typical Applications
BS 4659 BH21
Hot extrusion dies, brass/bronze forging dies
EN ISO 4957 X30WCrV9-3
Hot extrusion dies, hot forging dies for non-ferrous metals
Key Differences
Can BS 4659 BH21 Be Substituted With EN ISO 4957 X30WCrV9-3?
BS 4659 BH21 and EN ISO 4957 X30WCrV9-3 overlap closely enough on chemistry and mechanical properties that EN ISO 4957 X30WCrV9-3 is often considered as a substitute for BS 4659 BH21 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 BH21
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 4400–4600 mm (173.23–181.1 in)
EN ISO 4957 X30WCrV9-3
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2800–3600 mm (110.24–141.73 in)
On M-EX Right Now
BS 4659 BH21
2 active listings and RFQs →
EN ISO 4957 X30WCrV9-3
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 4659 BH21 and EN ISO 4957 X30WCrV9-3?
EN ISO 4957 X30WCrV9-3 specifies Si which is not specified for BS 4659 BH21.
Can BS 4659 BH21 be substituted with EN ISO 4957 X30WCrV9-3?
BS 4659 BH21 and EN ISO 4957 X30WCrV9-3 overlap closely enough on chemistry and mechanical properties that EN ISO 4957 X30WCrV9-3 is often considered as a substitute for BS 4659 BH21 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.