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GOST 5950 3H2W8F vs GB/T 1299 4Cr5MoSiV

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

GOST 5950 3H2W8F (GOST 5950-2000) and GB/T 1299 4Cr5MoSiV (GB/T 1299-2014) are both steel grades. Both fall under the Tool & Die Steels category. GOST 5950 3H2W8F is typically used for used for forging dies, extrusion tools, hot punches, mandrels, and die inserts., while GB/T 1299 4Cr5MoSiV is commonly used for die casting dies, extrusion tooling. GB/T 1299 4Cr5MoSiV is defined under Guobiao Standards (GB/T) (China).

As per chemical composition, GOST 5950 3H2W8F vs GB/T 1299 4Cr5MoSiV is a 61.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GOST 5950 3H2W8F:
GB/T 1299 3Cr2W8V GOST 5950 4H5MFS EN ISO 683-17 100Cr6 AISI 52100 IS 1570 (Part 6) 70T6 IS 1570 (Part 6) 133T3 IS 3748 70T3 IS 1570 (Part 6) 103T3 IS 1570 (Part 6) 70T3 IS 3748 80T3 IS 3748 103T3 IS 3748 50T8
Match Breakdown
CHEMISTRY MATCH
61.1%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV
Standard GOST 5950-2000 GB/T 1299-2014
Category Tool & Die Steels Tool & Die Steels
C (%) 0.3-0.4 0.32–0.45
Cr (%) 2.2-2.7 4.75–5.50
W (%) 7.5-9.0 Not specified
V (%) 0.3-0.6 0.30–0.60
Si (%) 0.2-0.5 0.80–1.20
Mn (%) Not specified 0.20–0.50
Mo (%) Not specified 1.10–1.60
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV
Tensile Strength 1400-1700 MPa Not specified
Yield Strength 1200 MPa min Not specified
Elongation 8% min Not specified
Hardness 45-50 HRC Not specified
Hardness HRC (hardened) Not specified 40–54
Hardness HB (annealed) Not specified ≤235
Typical Applications
GOST 5950 3H2W8F
Used for forging dies, extrusion tools, hot punches, mandrels, and die inserts.
GB/T 1299 4Cr5MoSiV
Die casting dies, extrusion tooling
Key Differences
Can GOST 5950 3H2W8F Be Substituted With GB/T 1299 4Cr5MoSiV?
GOST 5950 3H2W8F and GB/T 1299 4Cr5MoSiV 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
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)
GB/T 1299 4Cr5MoSiV
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2500–2700 mm (98.43–106.3 in)
On M-EX Right Now
GOST 5950 3H2W8F
2 active listings and RFQs →
GB/T 1299 4Cr5MoSiV
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 5950 3H2W8F and GB/T 1299 4Cr5MoSiV?
GOST 5950 3H2W8F specifies W which is not specified for GB/T 1299 4Cr5MoSiV. GB/T 1299 4Cr5MoSiV specifies Mn, Mo which are not specified for GOST 5950 3H2W8F.
Can GOST 5950 3H2W8F be substituted with GB/T 1299 4Cr5MoSiV?
GOST 5950 3H2W8F and GB/T 1299 4Cr5MoSiV 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.