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GB/T 18254 GCr15 vs GOST 5950 4H5MFS

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

GB/T 18254 GCr15 (GB/T 18254-2016) and GOST 5950 4H5MFS (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 4H5MFS is commonly used for used for die casting dies, forging tools, extrusion dies, punches, and hot shear blades.. GB/T 18254 GCr15 is defined under Guobiao Standards (GB/T) (China).

As per chemical composition, GB/T 18254 GCr15 vs GOST 5950 4H5MFS 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 GOST 5950 4H5MFS1 DIN EN ISO 4957 1.2379 GB/T 1299 4Cr5MoSiV EN ISO 4957 1.2316 GOST 5950 3H2W8F DIN EN ISO 4957 1.2344 GB/T 1299 3Cr2W8V GB/T 1299 4Cr5MoSiV1 IS 1570 (Part 6) 103T3
Other Tool & Die Steels Grades to Compare With GB/T 18254 GCr15:
IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
59.5%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GB/T 18254 GCr15 GOST 5950 4H5MFS
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 4H5MFS
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 4H5MFS
Used for die casting dies, forging tools, extrusion dies, punches, and hot shear blades.
Key Differences
Can GB/T 18254 GCr15 Be Substituted With GOST 5950 4H5MFS?
GB/T 18254 GCr15 and GOST 5950 4H5MFS 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 4H5MFS
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
GB/T 18254 GCr15
23 active listings and RFQs →
GOST 5950 4H5MFS
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 18254 GCr15 and GOST 5950 4H5MFS?
GB/T 18254 GCr15 specifies Mn, S, P which are not specified for GOST 5950 4H5MFS. GOST 5950 4H5MFS specifies Mo, V which are not specified for GB/T 18254 GCr15.
Can GB/T 18254 GCr15 be substituted with GOST 5950 4H5MFS?
GB/T 18254 GCr15 and GOST 5950 4H5MFS 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.