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ASTM A681 A4 vs GB/T 1299 4Cr5MoSiV

Minimal Match — 40.5% match based on chemical composition and mechanical property overlap.

ASTM A681 A4 (ASTM A681:2008) and GB/T 1299 4Cr5MoSiV (GB/T 1299-2014) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 A4 is typically used for tools, dies and fixtures (clause 1.2), while GB/T 1299 4Cr5MoSiV is commonly used for die casting dies, extrusion tooling. ASTM A681 A4 is defined under ASTM International, originating from United States, while GB/T 1299 4Cr5MoSiV is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, ASTM A681 A4 vs GB/T 1299 4Cr5MoSiV is a 60.8% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 40.5%.

Frequently Compared With ASTM A681 A4:
GB/T 1299 3Cr2W8V DIN EN ISO 4957 1.2344 EN ISO 683-17 100Cr6 GB/T 1299 4Cr5MoSiV1 DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 103T3 IS 1570 (Part 6) 133T3 GOST 5950 4H5MFS EN ISO 4957 1.2316 IS 1570 (Part 6) 118T3 GOST 5950 3H2W8F IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
60.8%
MECHANICAL MATCH
0%
OVERALL
40.5%
Specifications
Property ASTM A681 A4 GB/T 1299 4Cr5MoSiV
Standard ASTM A681:2008 GB/T 1299-2014
Category Tool & Die Steels Tool & Die Steels
C (%) 0.95-1.05 0.32–0.45
Mn (%) 1.80-2.20 0.20–0.50
P (%) <=0.030 Not specified
S (%) <=0.030 Not specified
Si (%) 0.10-0.70 0.80–1.20
Cr (%) 0.90-2.20 4.75–5.50
Mo (%) 0.90-1.40 1.10–1.60
V (%) Not specified 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 ASTM A681 A4 GB/T 1299 4Cr5MoSiV
Hardness <=241 HB Not specified
Condition Annealed (maximum Brinell hardness) Not specified
Hardness HRC (hardened) Not specified 40–54
Hardness HB (annealed) Not specified ≤235
Typical Applications
ASTM A681 A4
Tools, dies and fixtures (clause 1.2)
GB/T 1299 4Cr5MoSiV
Die casting dies, extrusion tooling
Key Differences
Can ASTM A681 A4 Be Substituted With GB/T 1299 4Cr5MoSiV?
ASTM A681 A4 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
ASTM A681 A4
No active listings currently.
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
ASTM A681 A4
0 active listings and RFQs →
GB/T 1299 4Cr5MoSiV
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 A4 and GB/T 1299 4Cr5MoSiV?
ASTM A681 A4 specifies P, S which are not specified for GB/T 1299 4Cr5MoSiV. GB/T 1299 4Cr5MoSiV specifies V which is not specified for ASTM A681 A4.
Can ASTM A681 A4 be substituted with GB/T 1299 4Cr5MoSiV?
ASTM A681 A4 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.