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KS D 3753 STS3 vs GOST 5950 4H5MFS

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

KS D 3753 STS3 (KS D 3753:2023) and GOST 5950 4H5MFS (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 4H5MFS is commonly used for used for die casting dies, forging tools, extrusion dies, punches, and hot shear blades.. KS D 3753 STS3 is defined under Korean Industrial Standards (KS) (South Korea).

As per chemical composition, KS D 3753 STS3 vs GOST 5950 4H5MFS 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 GB/T 1299 4Cr5MoSiV AISI 52100 DIN EN ISO 4957 1.2379 GOST 5950 4H5MFS1 EN ISO 4957 1.2316 GB/T 1299 3Cr2W8V GOST 5950 3H2W8F 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 4H5MFS
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 4H5MFS
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 4H5MFS
Used for die casting dies, forging tools, extrusion dies, punches, and hot shear blades.
Key Differences
Can KS D 3753 STS3 Be Substituted With GOST 5950 4H5MFS?
KS D 3753 STS3 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
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 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
KS D 3753 STS3
2 active listings and RFQs →
GOST 5950 4H5MFS
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D 3753 STS3 and GOST 5950 4H5MFS?
KS D 3753 STS3 specifies Mn, W, P, S which are not specified for GOST 5950 4H5MFS. GOST 5950 4H5MFS specifies Mo, V which are not specified for KS D 3753 STS3.
Can KS D 3753 STS3 be substituted with GOST 5950 4H5MFS?
KS D 3753 STS3 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.