Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
GOST 5950 4H5MFS1 (GOST 5950-2000) and AISI 52100 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 AISI 52100 is commonly used for anti-friction bearings, ball screws, precision rollers.
AISI 52100 is defined under AISI (United States).
As per chemical composition, GOST 5950 4H5MFS1 vs AISI 52100 is a 59.5% match.
As per mechanical properties, the match is 0%.
Combined, this makes them a minimal match overall at 35%.
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
AISI 52100
Tensile Strength
1350-1650 MPa
≥620 MPa (annealed)
Yield Strength
1150 MPa min
Not specified
Elongation
9% min
Not specified
Hardness
44-50 HRC
Not specified
Hardness HRC
Not specified
60–66 (hardened)
Hardness HB
Not specified
179–229 (annealed)
Typical Applications
GOST 5950 4H5MFS1
Used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.
GOST 5950 4H5MFS1 specifies Mo, V which are not specified for AISI 52100.
AISI 52100 specifies Mn, S, P which are not specified for GOST 5950 4H5MFS1.
Can GOST 5950 4H5MFS1 Be Substituted With AISI 52100?
GOST 5950 4H5MFS1 and AISI 52100 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.
What is the difference between GOST 5950 4H5MFS1 and AISI 52100?
GOST 5950 4H5MFS1 specifies Mo, V which are not specified for AISI 52100. AISI 52100 specifies Mn, S, P which are not specified for GOST 5950 4H5MFS1.
Can GOST 5950 4H5MFS1 be substituted with AISI 52100?
GOST 5950 4H5MFS1 and AISI 52100 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.