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ASTM A681 S7 vs GB/T 1299 3Cr2W8V

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

ASTM A681 S7 (ASTM A681:2008) and GB/T 1299 3Cr2W8V (GB/T 1299-2014) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 S7 is typically used for tools, dies and fixtures (clause 1.2), while GB/T 1299 3Cr2W8V is commonly used for used for hot forging dies, extrusion dies, die-casting molds, hot punches, and hot shear blades.. ASTM A681 S7 is defined under ASTM International, originating from United States, while GB/T 1299 3Cr2W8V is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, ASTM A681 S7 vs GB/T 1299 3Cr2W8V is a 56.6% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ASTM A681 S7:
DIN EN ISO 4957 1.2344 EN ISO 4957 1.2316 IS 1570 (Part 6) 133T3 GB/T 1299 4Cr5MoSiV1 GB/T 1299 4Cr5MoSiV GOST 5950 4H5MFS1 DIN EN ISO 4957 1.2379 EN ISO 683-17 100Cr6 IS 1570 (Part 6) 118T3 GOST 5950 3H2W8F GOST 5950 4H5MFS IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
56.6%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property ASTM A681 S7 GB/T 1299 3Cr2W8V
Standard ASTM A681:2008 GB/T 1299-2014
Category Tool & Die Steels Tool & Die Steels
C (%) 0.45-0.55 0.30-0.40
Mn (%) 0.20-0.90 0.20-0.50
P (%) <=0.030 0.030 max
S (%) <=0.030 0.030 max
Si (%) 0.20-1.00 0.20-0.40
Cr (%) 3.00-3.50 2.20-2.70
V (%) <=0.35 0.20-0.50
Mo (%) 1.30-1.80 Not specified
W (%) Not specified 7.50-9.00
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 S7 GB/T 1299 3Cr2W8V
Hardness <=229 HB 48-54 HRC
Condition Annealed (maximum Brinell hardness) Not specified
Tensile Strength Not specified 1180-1380 MPa
Yield Strength Not specified 980-1180 MPa
Elongation Not specified 10-14%
Typical Applications
ASTM A681 S7
Tools, dies and fixtures (clause 1.2)
GB/T 1299 3Cr2W8V
Used for hot forging dies, extrusion dies, die-casting molds, hot punches, and hot shear blades.
Key Differences
Can ASTM A681 S7 Be Substituted With GB/T 1299 3Cr2W8V?
ASTM A681 S7 and GB/T 1299 3Cr2W8V 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 S7
No active listings currently.
GB/T 1299 3Cr2W8V
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2800–2900 mm (110.24–114.17 in)
On M-EX Right Now
ASTM A681 S7
0 active listings and RFQs →
GB/T 1299 3Cr2W8V
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 S7 and GB/T 1299 3Cr2W8V?
ASTM A681 S7 specifies Mo which is not specified for GB/T 1299 3Cr2W8V. GB/T 1299 3Cr2W8V specifies W which is not specified for ASTM A681 S7.
Can ASTM A681 S7 be substituted with GB/T 1299 3Cr2W8V?
ASTM A681 S7 and GB/T 1299 3Cr2W8V 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.