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GB/T 1299 4Cr5MoSiV1 vs IS 3748 103T3

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

GB/T 1299 4Cr5MoSiV1 (GB/T 1299-2014) and IS 3748 103T3 (IS 3748:1990) are both steel grades. Both fall under the Tool & Die Steels category. GB/T 1299 4Cr5MoSiV1 is typically used for die casting dies, forging dies, extrusion tools, while IS 3748 103T3 is commonly used for cold work tools and dies for blanking, trimming, chipping and shearing. GB/T 1299 4Cr5MoSiV1 is defined under Guobiao Standards (GB/T), originating from China, while IS 3748 103T3 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, GB/T 1299 4Cr5MoSiV1 vs IS 3748 103T3 is a 60% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 1299 4Cr5MoSiV1:
GB/T 1299 4Cr5MoSiV EN ISO 683-17 100Cr6 GOST 5950 4H5MFS DIN EN ISO 4957 1.2344 GOST 5950 4H5MFS1 AISI 52100 IS 1570 (Part 6) 70T3 IS 1570 (Part 6) 103T3 EN ISO 4957 1.2316 IS 1570 (Part 6) 55T8 IS 1570 (Part 6) 133T3 IS 1570 (Part 6) 50T8
Match Breakdown
CHEMISTRY MATCH
60%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GB/T 1299 4Cr5MoSiV1 IS 3748 103T3
Standard GB/T 1299-2014 IS 3748:1990
Category Tool & Die Steels Tool & Die Steels
C (%) 0.32–0.45 0.95-1.10
Si (%) 0.80–1.20 0.10-0.30
Mn (%) 0.20–0.50 <=0.40
Cr (%) 4.75–5.50 Not specified
Mo (%) 1.20–1.75 Not specified
V (%) 0.80–1.20 Not specified
S (%) Not specified <=0.035
P (%) Not specified <=0.035
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 4Cr5MoSiV1 IS 3748 103T3
Hardness HRC (hardened) 42–54 Not specified
Hardness HB (annealed) ≤235 Not specified
Hardness Not specified <=220 HB
Condition Not specified Annealed (maximum Brinell hardness)
Typical Applications
GB/T 1299 4Cr5MoSiV1
Die casting dies, forging dies, extrusion tools
IS 3748 103T3
Cold work tools and dies for blanking, trimming, chipping and shearing
Key Differences
Can GB/T 1299 4Cr5MoSiV1 Be Substituted With IS 3748 103T3?
GB/T 1299 4Cr5MoSiV1 and IS 3748 103T3 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
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)
IS 3748 103T3
No active listings currently.
On M-EX Right Now
GB/T 1299 4Cr5MoSiV1
2 active listings and RFQs →
IS 3748 103T3
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 1299 4Cr5MoSiV1 and IS 3748 103T3?
GB/T 1299 4Cr5MoSiV1 specifies Cr, Mo, V which are not specified for IS 3748 103T3. IS 3748 103T3 specifies S, P which are not specified for GB/T 1299 4Cr5MoSiV1.
Can GB/T 1299 4Cr5MoSiV1 be substituted with IS 3748 103T3?
GB/T 1299 4Cr5MoSiV1 and IS 3748 103T3 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.