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GOST 5950 H12 vs GB/T 1299 4Cr5MoSiV

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

GOST 5950 H12 (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 H12 is typically used for used for cold dies, punches, shear blades, rolls, and forming tools., 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 H12 vs GB/T 1299 4Cr5MoSiV is a 63.5% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GOST 5950 H12:
EN ISO 4957 1.2316 GOST 5950 3H2W8F GB/T 1299 3Cr2W8V GOST 5950 4H5MFS1 EN ISO 683-17 100Cr6 GOST 5950 4H5MFS GB/T 1299 4Cr5MoSiV1 DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 AISI 52100 IS 3748 103T3 IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
63.5%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GOST 5950 H12 GB/T 1299 4Cr5MoSiV
Standard GOST 5950-2000 GB/T 1299-2014
Category Tool & Die Steels Tool & Die Steels
C (%) 1.9-2.2 0.32–0.45
Cr (%) 11-13 4.75–5.50
Mn (%) 0.2-0.6 0.20–0.50
Si (%) 0.2-0.6 0.80–1.20
Mo (%) Not specified 1.10–1.60
V (%) Not specified 0.30–0.60
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 H12 GB/T 1299 4Cr5MoSiV
Tensile Strength 1000-1200 MPa Not specified
Yield Strength 800 MPa min Not specified
Elongation 5% min Not specified
Hardness 60-64 HRC Not specified
Hardness HRC (hardened) Not specified 40–54
Hardness HB (annealed) Not specified ≤235
Typical Applications
GOST 5950 H12
Used for cold dies, punches, shear blades, rolls, and forming tools.
GB/T 1299 4Cr5MoSiV
Die casting dies, extrusion tooling
Key Differences
Can GOST 5950 H12 Be Substituted With GB/T 1299 4Cr5MoSiV?
GOST 5950 H12 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 H12
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3600–4000 mm (141.73–157.48 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 H12
2 active listings and RFQs →
GB/T 1299 4Cr5MoSiV
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 5950 H12 and GB/T 1299 4Cr5MoSiV?
GB/T 1299 4Cr5MoSiV specifies Mo, V which are not specified for GOST 5950 H12.
Can GOST 5950 H12 be substituted with GB/T 1299 4Cr5MoSiV?
GOST 5950 H12 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.