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BS 4659 BH21 vs GOST 5950 3H2W8F

Minimal Match — 46.6% match based on chemical composition and mechanical property overlap.

BS 4659 BH21 (BS 4659:1989) and GOST 5950 3H2W8F (GOST 5950-2000) 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 GOST 5950 3H2W8F is commonly used for used for forging dies, extrusion tools, hot punches, mandrels, and die inserts.. BS 4659 BH21 is defined under British Standards (BS) (United Kingdom).

As per chemical composition, BS 4659 BH21 vs GOST 5950 3H2W8F is a 70% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 46.6%.

Frequently Compared With BS 4659 BH21:
GB/T 1299 3Cr2W8V GOST 5950 4H5MFS1 EN ISO 4957 1.2316 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
Other Tool & Die Steels Grades to Compare With BS 4659 BH21:
IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
70%
MECHANICAL MATCH
0%
OVERALL
46.6%
Specifications
Property BS 4659 BH21 GOST 5950 3H2W8F
Standard BS 4659:1989 GOST 5950-2000
Category Tool & Die Steels Tool & Die Steels
C (%) 0.26–0.36 0.3-0.4
Mn (%) 0.15–0.40 Not specified
Cr (%) 3.00–3.75 2.2-2.7
W (%) 8.50–10.00 7.5-9.0
V (%) 0.30–0.60 0.3-0.6
Si (%) Not specified 0.2-0.5
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 GOST 5950 3H2W8F
Hardness HRC (hardened) 36–54 Not specified
Hardness HB (annealed) ≤229 Not specified
Tensile Strength Not specified 1400-1700 MPa
Yield Strength Not specified 1200 MPa min
Elongation Not specified 8% min
Hardness Not specified 45-50 HRC
Typical Applications
BS 4659 BH21
Hot extrusion dies, brass/bronze forging dies
GOST 5950 3H2W8F
Used for forging dies, extrusion tools, hot punches, mandrels, and die inserts.
Key Differences
Can BS 4659 BH21 Be Substituted With GOST 5950 3H2W8F?
BS 4659 BH21 and GOST 5950 3H2W8F 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 BH21
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 4400–4600 mm (173.23–181.1 in)
GOST 5950 3H2W8F
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2800–4300 mm (110.24–169.29 in)
On M-EX Right Now
BS 4659 BH21
2 active listings and RFQs →
GOST 5950 3H2W8F
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 4659 BH21 and GOST 5950 3H2W8F?
BS 4659 BH21 specifies Mn which is not specified for GOST 5950 3H2W8F. GOST 5950 3H2W8F specifies Si which is not specified for BS 4659 BH21.
Can BS 4659 BH21 be substituted with GOST 5950 3H2W8F?
BS 4659 BH21 and GOST 5950 3H2W8F 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.