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JIS G4404 SKD6 vs GB/T 1299 4Cr5MoSiV

Related Material — 60.5% match based on chemical composition and mechanical property overlap.

JIS G4404 SKD6 (JIS G4404:2006) and GB/T 1299 4Cr5MoSiV (GB/T 1299-2014) are both steel grades. Both fall under the Tool & Die Steels category. JIS G4404 SKD6 is typically used for die casting dies, hot forging tools, while GB/T 1299 4Cr5MoSiV is commonly used for die casting dies, extrusion tooling. JIS G4404 SKD6 is defined under Japanese Industrial Standards (JIS), originating from Japan, while GB/T 1299 4Cr5MoSiV is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, JIS G4404 SKD6 vs GB/T 1299 4Cr5MoSiV is a 90.7% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 60.5%.

Frequently Compared With JIS G4404 SKD6:
GOST 5950 4H5MFS1 GOST 5950 4H5MFS EN ISO 683-17 100Cr6 AISI 52100 EN ISO 4957 1.2316 GB/T 1299 3Cr2W8V GOST 5950 3H2W8F DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 GB/T 1299 4Cr5MoSiV1 IS 1570 (Part 6) 103T3 IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
90.7%
MECHANICAL MATCH
0%
OVERALL
60.5%
Specifications
Property JIS G4404 SKD6 GB/T 1299 4Cr5MoSiV
Standard JIS G4404:2006 GB/T 1299-2014
Category Tool & Die Steels Tool & Die Steels
C (%) 0.32-0.42 0.32–0.45
Si (%) 0.80-1.20 0.80–1.20
Mn (%) 0.25-0.50 0.20–0.50
Cr (%) 4.50-5.50 4.75–5.50
Mo (%) 1.00-1.50 1.10–1.60
V (%) 0.30-0.50 0.30–0.60
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 SKD6 GB/T 1299 4Cr5MoSiV
Hardness HRC (hardened) 40-52 40–54
Hardness HB (annealed) <=229 ≤235
Typical Applications
JIS G4404 SKD6
Die casting dies, hot forging tools
GB/T 1299 4Cr5MoSiV
Die casting dies, extrusion tooling
Can JIS G4404 SKD6 Be Substituted With GB/T 1299 4Cr5MoSiV?
JIS G4404 SKD6 and GB/T 1299 4Cr5MoSiV 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 SKD6
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2500–3900 mm (98.43–153.54 in)
GB/T 1299 4Cr5MoSiV
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
JIS G4404 SKD6
2 active listings and RFQs →
GB/T 1299 4Cr5MoSiV
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4404 SKD6 and GB/T 1299 4Cr5MoSiV?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can JIS G4404 SKD6 be substituted with GB/T 1299 4Cr5MoSiV?
JIS G4404 SKD6 and GB/T 1299 4Cr5MoSiV 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.