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KS D 3753 STS3 vs GOST 5950 4H5MFS1

Minimal Match — 32.8% match based on chemical composition and mechanical property overlap.

KS D 3753 STS3 (KS D 3753:2023) and GOST 5950 4H5MFS1 (GOST 5950-2000) are both steel grades. Both fall under the Tool & Die Steels category. KS D 3753 STS3 is typically used for used in chisels, punches, dies, shear tools, gauges, and hand tools., while GOST 5950 4H5MFS1 is commonly used for used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.. KS D 3753 STS3 is defined under Korean Industrial Standards (KS) (South Korea).

As per chemical composition, KS D 3753 STS3 vs GOST 5950 4H5MFS1 is a 49.2% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 32.8%.

Frequently Compared With KS D 3753 STS3:
DIN EN ISO 4957 1.2344 GB/T 1299 4Cr5MoSiV1 EN ISO 683-17 100Cr6 AISI 52100 GB/T 1299 4Cr5MoSiV DIN EN ISO 4957 1.2379 EN ISO 4957 1.2316 GOST 5950 3H2W8F GB/T 1299 3Cr2W8V GOST 5950 4H5MFS IS 1570 (Part 6) 103T3 IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
49.2%
MECHANICAL MATCH
0%
OVERALL
32.8%
Specifications
Property KS D 3753 STS3 GOST 5950 4H5MFS1
Standard KS D 3753:2023 GOST 5950-2000
Category Tool & Die Steels Tool & Die Steels
C (%) 0.80-0.90 0.35-0.45
Si (%) 0.15-0.35 0.8-1.2
Mn (%) 0.30-0.60 Not specified
Cr (%) 0.50-1.00 4.5-5.5
W (%) 0.50-1.00 Not specified
P (%) 0.030 max Not specified
S (%) 0.030 max 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 KS D 3753 STS3 GOST 5950 4H5MFS1
Tensile Strength 880-1100 MPa 1350-1650 MPa
Yield Strength 700 MPa min 1150 MPa min
Elongation 10% min 9% min
Hardness 56-60 HRC 44-50 HRC
Typical Applications
KS D 3753 STS3
Used in chisels, punches, dies, shear tools, gauges, and hand tools.
GOST 5950 4H5MFS1
Used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.
Key Differences
Can KS D 3753 STS3 Be Substituted With GOST 5950 4H5MFS1?
KS D 3753 STS3 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
KS D 3753 STS3
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2500–2600 mm (98.43–102.36 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
KS D 3753 STS3
2 active listings and RFQs →
GOST 5950 4H5MFS1
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D 3753 STS3 and GOST 5950 4H5MFS1?
KS D 3753 STS3 specifies Mn, W, P, S which are not specified for GOST 5950 4H5MFS1. GOST 5950 4H5MFS1 specifies Mo, V which are not specified for KS D 3753 STS3.
Can KS D 3753 STS3 be substituted with GOST 5950 4H5MFS1?
KS D 3753 STS3 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.