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GB/T 18254 GCr15 vs GOST 5950 4H5MFS1

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

GB/T 18254 GCr15 (GB/T 18254-2016) and GOST 5950 4H5MFS1 (GOST 5950-2000) are both steel grades. Both fall under the Tool & Die Steels category. GB/T 18254 GCr15 is typically used for ball bearings, roller bearings, bearing races, while GOST 5950 4H5MFS1 is commonly used for used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.. GB/T 18254 GCr15 is defined under Guobiao Standards (GB/T) (China).

As per chemical composition, GB/T 18254 GCr15 vs GOST 5950 4H5MFS1 is a 59.5% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 18254 GCr15:
EN ISO 683-17 100Cr6 AISI 52100 DIN EN ISO 4957 1.2379 GB/T 1299 4Cr5MoSiV EN ISO 4957 1.2316 GOST 5950 4H5MFS GOST 5950 3H2W8F DIN EN ISO 4957 1.2344 GB/T 1299 3Cr2W8V GB/T 1299 4Cr5MoSiV1 IS 3748 103T3 IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
59.5%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GB/T 18254 GCr15 GOST 5950 4H5MFS1
Standard GB/T 18254-2016 GOST 5950-2000
Category Tool & Die Steels Tool & Die Steels
C (%) 0.95–1.05 0.35-0.45
Si (%) 0.15–0.35 0.8-1.2
Mn (%) 0.25–0.45 Not specified
Cr (%) 1.40–1.65 4.5-5.5
S (%) ≤0.020 Not specified
P (%) ≤0.025 Not specified
Mo (%) Not specified 1.2-1.6
V (%) Not specified 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 18254 GCr15 GOST 5950 4H5MFS1
Hardness HRC (hardened) 60–66 Not specified
Hardness HB (annealed) ≤179–207 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 18254 GCr15
Ball bearings, roller bearings, bearing races
GOST 5950 4H5MFS1
Used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.
Key Differences
Can GB/T 18254 GCr15 Be Substituted With GOST 5950 4H5MFS1?
GB/T 18254 GCr15 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 18254 GCr15
Round Bar → (23 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2700–6600 mm (106.3–259.84 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 18254 GCr15
23 active listings and RFQs →
GOST 5950 4H5MFS1
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 18254 GCr15 and GOST 5950 4H5MFS1?
GB/T 18254 GCr15 specifies Mn, S, P which are not specified for GOST 5950 4H5MFS1. GOST 5950 4H5MFS1 specifies Mo, V which are not specified for GB/T 18254 GCr15.
Can GB/T 18254 GCr15 be substituted with GOST 5950 4H5MFS1?
GB/T 18254 GCr15 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.