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GOST 1435 U10 vs GOST 5950 4H5MFS1

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

GOST 1435 U10 (GOST 1435-1999) and GOST 5950 4H5MFS1 (GOST 5950-2000) are both steel grades. Both fall under the Tool & Die Steels category. GOST 1435 U10 is typically used for used for chisels, punches, files, woodworking tools, and knives., while GOST 5950 4H5MFS1 is commonly used for used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts..

As per chemical composition, GOST 1435 U10 vs GOST 5950 4H5MFS1 is a 57.2% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GOST 1435 U10:
DIN EN ISO 4957 1.2379 GB/T 1299 4Cr5MoSiV1 DIN EN ISO 4957 1.2344 EN ISO 4957 1.2316 EN ISO 683-17 100Cr6 AISI 52100 GB/T 1299 4Cr5MoSiV GOST 5950 3H2W8F GOST 5950 4H5MFS IS 1570 (Part 6) 103T3 GB/T 1299 3Cr2W8V IS 1570 (Part 6) 133T3
Match Breakdown
CHEMISTRY MATCH
57.2%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GOST 1435 U10 GOST 5950 4H5MFS1
Standard GOST 1435-1999 GOST 5950-2000
Category Tool & Die Steels Tool & Die Steels
C (%) 0.95-1.04 0.35-0.45
Mn (%) 0.17-0.33 Not specified
Si (%) 0.17-0.33 0.8-1.2
S (%) 0.028 max Not specified
P (%) 0.03 max Not specified
Cr (%) Not specified 4.5-5.5
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 GOST 1435 U10 GOST 5950 4H5MFS1
Tensile Strength 750-900 MPa 1350-1650 MPa
Yield Strength 450 MPa min 1150 MPa min
Elongation 10% min 9% min
Hardness 60-64 HRC 44-50 HRC
Typical Applications
GOST 1435 U10
Used for chisels, punches, files, woodworking tools, and knives.
GOST 5950 4H5MFS1
Used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.
Key Differences
Can GOST 1435 U10 Be Substituted With GOST 5950 4H5MFS1?
GOST 1435 U10 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
GOST 1435 U10
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2800–3100 mm (110.24–122.05 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
GOST 1435 U10
2 active listings and RFQs →
GOST 5950 4H5MFS1
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 1435 U10 and GOST 5950 4H5MFS1?
GOST 1435 U10 specifies Mn, S, P which are not specified for GOST 5950 4H5MFS1. GOST 5950 4H5MFS1 specifies Cr, Mo, V which are not specified for GOST 1435 U10.
Can GOST 1435 U10 be substituted with GOST 5950 4H5MFS1?
GOST 1435 U10 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.