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GB/T 1299 4Cr5MoSiV vs EN ISO 4957 X38CrMoV5-1

Strong Match — 98.8% match based on chemical composition and mechanical property overlap.

GB/T 1299 4Cr5MoSiV (GB/T 1299-2014) and EN ISO 4957 X38CrMoV5-1 (EN ISO 4957:2018) are both steel grades. Both fall under the Tool & Die Steels category. GB/T 1299 4Cr5MoSiV is typically used for die casting dies, extrusion tooling, while EN ISO 4957 X38CrMoV5-1 is commonly used for die casting dies, extrusion tooling, forging dies. GB/T 1299 4Cr5MoSiV is defined under Guobiao Standards (GB/T), originating from China, while EN ISO 4957 X38CrMoV5-1 is defined under European Standard (EN), originating from Europe.

As per chemical composition, GB/T 1299 4Cr5MoSiV vs EN ISO 4957 X38CrMoV5-1 is a 98.1% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 98.8%.

Frequently Compared With GB/T 1299 4Cr5MoSiV:
EN ISO 683-17 100Cr6 GB/T 1299 4Cr5MoSiV1 DIN EN ISO 4957 1.2344 GB/T 1299 3Cr2W8V GOST 5950 3H2W8F DIN EN ISO 4957 1.2379 EN ISO 4957 1.2316 GOST 5950 4H5MFS1 GOST 5950 4H5MFS AISI 52100 IS 1570 (Part 6) 70T3 IS 1570 (Part 6) 133T3
Match Breakdown
CHEMISTRY MATCH
98.1%
MECHANICAL MATCH
100%
OVERALL
98.8%
Specifications
Property GB/T 1299 4Cr5MoSiV EN ISO 4957 X38CrMoV5-1
Standard GB/T 1299-2014 EN ISO 4957:2018
Category Tool & Die Steels Tool & Die Steels
C (%) 0.32–0.45 0.33–0.43
Si (%) 0.80–1.20 0.80–1.20
Mn (%) 0.20–0.50 0.20–0.50
Cr (%) 4.75–5.50 4.75–5.50
Mo (%) 1.10–1.60 1.10–1.60
V (%) 0.30–0.60 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 GB/T 1299 4Cr5MoSiV EN ISO 4957 X38CrMoV5-1
Hardness HRC (hardened) 40–54 40–54
Hardness HB (annealed) ≤235 ≤235
Hot Strength Not specified Excellent to 600°C
Typical Applications
GB/T 1299 4Cr5MoSiV
Die casting dies, extrusion tooling
EN ISO 4957 X38CrMoV5-1
Die casting dies, extrusion tooling, forging dies
Can GB/T 1299 4Cr5MoSiV Be Substituted With EN ISO 4957 X38CrMoV5-1?
GB/T 1299 4Cr5MoSiV and EN ISO 4957 X38CrMoV5-1 overlap closely enough on chemistry and mechanical properties that EN ISO 4957 X38CrMoV5-1 is often considered as a substitute for GB/T 1299 4Cr5MoSiV in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
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)
EN ISO 4957 X38CrMoV5-1
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2500–3500 mm (98.43–137.8 in)
On M-EX Right Now
GB/T 1299 4Cr5MoSiV
2 active listings and RFQs →
EN ISO 4957 X38CrMoV5-1
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 1299 4Cr5MoSiV and EN ISO 4957 X38CrMoV5-1?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 1299 4Cr5MoSiV be substituted with EN ISO 4957 X38CrMoV5-1?
GB/T 1299 4Cr5MoSiV and EN ISO 4957 X38CrMoV5-1 overlap closely enough on chemistry and mechanical properties that EN ISO 4957 X38CrMoV5-1 is often considered as a substitute for GB/T 1299 4Cr5MoSiV in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.