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JIS G4404 SKS31 vs DIN EN ISO 4957 1.2379

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

JIS G4404 SKS31 (JIS G4404:2006) and DIN EN ISO 4957 1.2379 (DIN EN ISO 4957:2018-11) are both steel grades. Both fall under the Tool & Die Steels category. JIS G4404 SKS31 is typically used for cold working molds, press dies, jigs, gauges, long taps, reamers, measuring tools requiring minimal quenching distortion., while DIN EN ISO 4957 1.2379 is commonly used for blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies. JIS G4404 SKS31 is defined under Japanese Industrial Standards (JIS), originating from Japan, while DIN EN ISO 4957 1.2379 is defined under European Standard (EN), originating from Europe.

As per chemical composition, JIS G4404 SKS31 vs DIN EN ISO 4957 1.2379 is a 52.6% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With JIS G4404 SKS31:
EN ISO 4957 1.2316 GB/T 1299 4Cr5MoSiV DIN EN ISO 4957 1.2344 EN ISO 683-17 100Cr6 AISI 52100 GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS1 GB/T 1299 3Cr2W8V GOST 5950 3H2W8F GOST 5950 4H5MFS IS 3748 103T3
Other Tool & Die Steels Grades to Compare With JIS G4404 SKS31:
IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
52.6%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property JIS G4404 SKS31 DIN EN ISO 4957 1.2379
Standard JIS G4404:2006 DIN EN ISO 4957:2018-11
Category Tool & Die Steels Tool & Die Steels
C (%) 0.95-1.05 1.50–1.60
Si (%) <=0.35 0.10–0.40
Mn (%) 0.90-1.20 0.25–0.60
P (%) <=0.03 ≤0.030
S (%) <=0.03 ≤0.030
Cr (%) 0.80-1.20 11.00–13.00
W (%) 1.00-1.50 Not specified
Mo (%) Not specified 0.70–1.00
V (%) Not specified 0.80–1.10
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4404 SKS31 DIN EN ISO 4957 1.2379
Tensile Strength 900-1150 MPa Not specified
Yield Strength 750 MPa min Not specified
Elongation 10% min Not specified
Hardness 58-62 HRC Not specified
Hardness (annealed) Not specified ≤255 HB
Hardness (hardened) Not specified 58–62 HRC
Compressive Strength Not specified 2600 MPa
Typical Applications
JIS G4404 SKS31
Cold working molds, press dies, jigs, gauges, long taps, reamers, measuring tools requiring minimal quenching distortion.
DIN EN ISO 4957 1.2379
Blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies
Key Differences
Can JIS G4404 SKS31 Be Substituted With DIN EN ISO 4957 1.2379?
JIS G4404 SKS31 and DIN EN ISO 4957 1.2379 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
JIS G4404 SKS31
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2500–3700 mm (98.43–145.67 in)
DIN EN ISO 4957 1.2379
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2800–3300 mm (110.24–129.92 in)
On M-EX Right Now
JIS G4404 SKS31
2 active listings and RFQs →
DIN EN ISO 4957 1.2379
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4404 SKS31 and DIN EN ISO 4957 1.2379?
JIS G4404 SKS31 specifies W which is not specified for DIN EN ISO 4957 1.2379. DIN EN ISO 4957 1.2379 specifies Mo, V which are not specified for JIS G4404 SKS31.
Can JIS G4404 SKS31 be substituted with DIN EN ISO 4957 1.2379?
JIS G4404 SKS31 and DIN EN ISO 4957 1.2379 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.