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EN ISO 4957 X155CrVMo12-1 vs GB/T 1299 4Cr5MoSiV1

Minimal Match — 44.7% match based on chemical composition and mechanical property overlap.

EN ISO 4957 X155CrVMo12-1 (EN ISO 4957:2018) and GB/T 1299 4Cr5MoSiV1 (GB/T 1299-2014) are both steel grades. Both fall under the Tool & Die Steels category. EN ISO 4957 X155CrVMo12-1 is typically used for blanking dies, forming dies, thread rolling dies, gauges, while GB/T 1299 4Cr5MoSiV1 is commonly used for die casting dies, forging dies, extrusion tools. EN ISO 4957 X155CrVMo12-1 is defined under European Standard (EN), originating from Europe, while GB/T 1299 4Cr5MoSiV1 is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, EN ISO 4957 X155CrVMo12-1 vs GB/T 1299 4Cr5MoSiV1 is a 67% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 44.7%.

Frequently Compared With EN ISO 4957 X155CrVMo12-1:
DIN EN ISO 4957 1.2344 EN ISO 683-17 100Cr6 EN ISO 4957 1.2316 GOST 5950 3H2W8F GOST 5950 4H5MFS DIN EN ISO 4957 1.2379 GB/T 1299 3Cr2W8V GOST 5950 4H5MFS1 GB/T 1299 4Cr5MoSiV AISI 52100 IS 1570 (Part 6) 103T3
Other Tool & Die Steels Grades to Compare With EN ISO 4957 X155CrVMo12-1:
IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
67%
MECHANICAL MATCH
0%
OVERALL
44.7%
Specifications
Property EN ISO 4957 X155CrVMo12-1 GB/T 1299 4Cr5MoSiV1
Standard EN ISO 4957:2018 GB/T 1299-2014
Category Tool & Die Steels Tool & Die Steels
C (%) 1.55–1.65 0.32–0.45
Mn (%) 0.20–0.50 0.20–0.50
Cr (%) 11.50–12.50 4.75–5.50
Mo (%) 0.60–0.80 1.20–1.75
V (%) 0.70–1.00 0.80–1.20
Si (%) ≤0.40 0.80–1.20
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property EN ISO 4957 X155CrVMo12-1 GB/T 1299 4Cr5MoSiV1
Hardness HRC (hardened) 58–62 42–54
Hardness HB (annealed) ≤255 ≤235
Wear Resistance Excellent Not specified
Typical Applications
EN ISO 4957 X155CrVMo12-1
Blanking dies, forming dies, thread rolling dies, gauges
GB/T 1299 4Cr5MoSiV1
Die casting dies, forging dies, extrusion tools
Can EN ISO 4957 X155CrVMo12-1 Be Substituted With GB/T 1299 4Cr5MoSiV1?
EN ISO 4957 X155CrVMo12-1 and GB/T 1299 4Cr5MoSiV1 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
EN ISO 4957 X155CrVMo12-1
Round Bar → (3 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2500–3200 mm (98.43–125.98 in)
GB/T 1299 4Cr5MoSiV1
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2700–4100 mm (106.3–161.42 in)
On M-EX Right Now
EN ISO 4957 X155CrVMo12-1
3 active listings and RFQs →
GB/T 1299 4Cr5MoSiV1
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between EN ISO 4957 X155CrVMo12-1 and GB/T 1299 4Cr5MoSiV1?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN ISO 4957 X155CrVMo12-1 be substituted with GB/T 1299 4Cr5MoSiV1?
EN ISO 4957 X155CrVMo12-1 and GB/T 1299 4Cr5MoSiV1 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.