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GB/T 1299 4Cr5MoSiV1 vs GOST 5950 4H5MFS1

Related Material — 55.4% match based on chemical composition and mechanical property overlap.

GB/T 1299 4Cr5MoSiV1 (GB/T 1299-2014) and GOST 5950 4H5MFS1 (GOST 5950-2000) are both steel grades. Both fall under the Tool & Die Steels category. GB/T 1299 4Cr5MoSiV1 is typically used for die casting dies, forging dies, extrusion tools, while GOST 5950 4H5MFS1 is commonly used for used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.. GB/T 1299 4Cr5MoSiV1 is defined under Guobiao Standards (GB/T) (China).

As per chemical composition, GB/T 1299 4Cr5MoSiV1 vs GOST 5950 4H5MFS1 is a 83.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 55.4%.

Frequently Compared With GB/T 1299 4Cr5MoSiV1:
GB/T 1299 4Cr5MoSiV EN ISO 683-17 100Cr6 GOST 5950 4H5MFS DIN EN ISO 4957 1.2344 AISI 52100 IS 1570 (Part 6) 70T3 IS 1570 (Part 6) 103T3 IS 3748 103T3 EN ISO 4957 1.2316 IS 1570 (Part 6) 55T8 IS 1570 (Part 6) 133T3 IS 1570 (Part 6) 50T8
Match Breakdown
CHEMISTRY MATCH
83.1%
MECHANICAL MATCH
0%
OVERALL
55.4%
Specifications
Property GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS1
Standard GB/T 1299-2014 GOST 5950-2000
Category Tool & Die Steels Tool & Die Steels
C (%) 0.32–0.45 0.35-0.45
Si (%) 0.80–1.20 0.8-1.2
Mn (%) 0.20–0.50 Not specified
Cr (%) 4.75–5.50 4.5-5.5
Mo (%) 1.20–1.75 1.2-1.6
V (%) 0.80–1.20 0.3-0.6
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS1
Hardness HRC (hardened) 42–54 Not specified
Hardness HB (annealed) ≤235 Not specified
Tensile Strength Not specified 1350-1650 MPa
Yield Strength Not specified 1150 MPa min
Elongation Not specified 9% min
Hardness Not specified 44-50 HRC
Typical Applications
GB/T 1299 4Cr5MoSiV1
Die casting dies, forging dies, extrusion tools
GOST 5950 4H5MFS1
Used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.
Key Differences
Can GB/T 1299 4Cr5MoSiV1 Be Substituted With GOST 5950 4H5MFS1?
GB/T 1299 4Cr5MoSiV1 and GOST 5950 4H5MFS1 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
GB/T 1299 4Cr5MoSiV1
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2700–4100 mm (106.3–161.42 in)
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)
On M-EX Right Now
GB/T 1299 4Cr5MoSiV1
2 active listings and RFQs →
GOST 5950 4H5MFS1
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 1299 4Cr5MoSiV1 and GOST 5950 4H5MFS1?
GB/T 1299 4Cr5MoSiV1 specifies Mn which is not specified for GOST 5950 4H5MFS1.
Can GB/T 1299 4Cr5MoSiV1 be substituted with GOST 5950 4H5MFS1?
GB/T 1299 4Cr5MoSiV1 and GOST 5950 4H5MFS1 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.