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BS 4659 BPO2 vs DIN EN ISO 4957 1.2379

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

BS 4659 BPO2 (BS 4659:1989) and DIN EN ISO 4957 1.2379 (DIN EN ISO 4957:2018-11) are both steel grades. Both fall under the Tool & Die Steels category. BS 4659 BPO2 is typically used for injection mould cavities, zinc die casting dies, while DIN EN ISO 4957 1.2379 is commonly used for blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies. BS 4659 BPO2 is defined under British Standards (BS), originating from United Kingdom, while DIN EN ISO 4957 1.2379 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 4659 BPO2 vs DIN EN ISO 4957 1.2379 is a 53% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With BS 4659 BPO2:
GOST 5950 3H2W8F EN ISO 4957 1.2316 EN ISO 683-17 100Cr6 GOST 5950 4H5MFS1 GB/T 1299 4Cr5MoSiV1 AISI 52100 DIN EN ISO 4957 1.2344 GOST 5950 4H5MFS GB/T 1299 3Cr2W8V GB/T 1299 4Cr5MoSiV
Other Tool & Die Steels Grades to Compare With BS 4659 BPO2:
IS 3748 103T3 IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
53%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property BS 4659 BPO2 DIN EN ISO 4957 1.2379
Standard BS 4659:1989 DIN EN ISO 4957:2018-11
Category Tool & Die Steels Tool & Die Steels
C (%) 0.07–0.12 1.50–1.60
Mn (%) 0.10–0.40 0.25–0.60
Cr (%) 0.75–1.25 11.00–13.00
Mo (%) 0.15–0.40 0.70–1.00
Ni (%) 0.10–0.50 Not specified
Si (%) Not specified 0.10–0.40
V (%) Not specified 0.80–1.10
S (%) Not specified ≤0.030
P (%) Not specified ≤0.030
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 BPO2 DIN EN ISO 4957 1.2379
Hardness HRC (case hardened) 58–64 Not specified
Hardness HRC (core) 20–30 Not specified
Hardness (annealed) Not specified ≤255 HB
Hardness (hardened) Not specified 58–62 HRC
Compressive Strength Not specified 2600 MPa
Typical Applications
BS 4659 BPO2
Injection mould cavities, zinc die casting dies
DIN EN ISO 4957 1.2379
Blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies
Key Differences
Can BS 4659 BPO2 Be Substituted With DIN EN ISO 4957 1.2379?
BS 4659 BPO2 and DIN EN ISO 4957 1.2379 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 BPO2
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2700–2900 mm (106.3–114.17 in)
DIN EN ISO 4957 1.2379
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2800–3300 mm (110.24–129.92 in)
On M-EX Right Now
BS 4659 BPO2
2 active listings and RFQs →
DIN EN ISO 4957 1.2379
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 4659 BPO2 and DIN EN ISO 4957 1.2379?
BS 4659 BPO2 specifies Ni which is not specified for DIN EN ISO 4957 1.2379. DIN EN ISO 4957 1.2379 specifies Si, V, S, P which are not specified for BS 4659 BPO2.
Can BS 4659 BPO2 be substituted with DIN EN ISO 4957 1.2379?
BS 4659 BPO2 and DIN EN ISO 4957 1.2379 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.