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GOST 5950 4H5MFS1 vs GB/T 1299 4Cr5MoSiV

Related Material — 59.4% match based on chemical composition and mechanical property overlap.

GOST 5950 4H5MFS1 (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 4H5MFS1 is typically used for used for forging dies, pressure casting dies, hot punches, extrusion tooling, 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 4H5MFS1 vs GB/T 1299 4Cr5MoSiV is a 89.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 59.4%.

Frequently Compared With GOST 5950 4H5MFS1:
GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS EN ISO 683-17 100Cr6 EN ISO 4957 1.2316 AISI 52100 IS 1570 (Part 6) 133T3 DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 IS 3748 103T3 IS 1570 (Part 6) 103T3 IS 3748 118T3 IS 1570 (Part 6) 118T3
Match Breakdown
CHEMISTRY MATCH
89.1%
MECHANICAL MATCH
0%
OVERALL
59.4%
Specifications
Property GOST 5950 4H5MFS1 GB/T 1299 4Cr5MoSiV
Standard GOST 5950-2000 GB/T 1299-2014
Category Tool & Die Steels Tool & Die Steels
C (%) 0.35-0.45 0.32–0.45
Cr (%) 4.5-5.5 4.75–5.50
Mo (%) 1.2-1.6 1.10–1.60
V (%) 0.3-0.6 0.30–0.60
Si (%) 0.8-1.2 0.80–1.20
Mn (%) Not specified 0.20–0.50
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GOST 5950 4H5MFS1 GB/T 1299 4Cr5MoSiV
Tensile Strength 1350-1650 MPa Not specified
Yield Strength 1150 MPa min Not specified
Elongation 9% min Not specified
Hardness 44-50 HRC Not specified
Hardness HRC (hardened) Not specified 40–54
Hardness HB (annealed) Not specified ≤235
Typical Applications
GOST 5950 4H5MFS1
Used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.
GB/T 1299 4Cr5MoSiV
Die casting dies, extrusion tooling
Key Differences
Can GOST 5950 4H5MFS1 Be Substituted With GB/T 1299 4Cr5MoSiV?
GOST 5950 4H5MFS1 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 4H5MFS1
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3000–3100 mm (118.11–122.05 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 4H5MFS1
2 active listings and RFQs →
GB/T 1299 4Cr5MoSiV
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 5950 4H5MFS1 and GB/T 1299 4Cr5MoSiV?
GB/T 1299 4Cr5MoSiV specifies Mn which is not specified for GOST 5950 4H5MFS1.
Can GOST 5950 4H5MFS1 be substituted with GB/T 1299 4Cr5MoSiV?
GOST 5950 4H5MFS1 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.