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ASTM A681 H21 vs GB/T 1299 3Cr2W8V

Minimal Match — 49% match based on chemical composition and mechanical property overlap.

ASTM A681 H21 (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 H21 is typically used for hot extrusion dies, hot forging dies for brass/bronze, 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 H21 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 H21 vs GB/T 1299 3Cr2W8V is a 73.4% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 49%.

Frequently Compared With ASTM A681 H21:
EN ISO 4957 1.2316 EN ISO 683-17 100Cr6 GB/T 1299 4Cr5MoSiV GB/T 1299 4Cr5MoSiV1 AISI 52100 DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 GOST 5950 3H2W8F GOST 5950 4H5MFS1 GOST 5950 4H5MFS IS 3748 103T3 IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
73.4%
MECHANICAL MATCH
0%
OVERALL
49%
Specifications
Property ASTM A681 H21 GB/T 1299 3Cr2W8V
Standard ASTM A681:2008 GB/T 1299-2014
Category Tool & Die Steels Tool & Die Steels
C (%) 0.26-0.36 0.30-0.40
Mn (%) 0.15-0.40 0.20-0.50
P (%) <=0.030 0.030 max
S (%) <=0.030 0.030 max
Si (%) 0.15-0.50 0.20-0.40
Cr (%) 3.00-3.75 2.20-2.70
V (%) 0.30-0.60 0.20-0.50
W (%) 8.50-10.00 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 H21 GB/T 1299 3Cr2W8V
Hardness <=235 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 H21
Hot extrusion dies, hot forging dies for brass/bronze
GB/T 1299 3Cr2W8V
Used for hot forging dies, extrusion dies, die-casting molds, hot punches, and hot shear blades.
Can ASTM A681 H21 Be Substituted With GB/T 1299 3Cr2W8V?
ASTM A681 H21 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 H21
Flat Bar → (3 listings)
Thickness: 30–30 mm (1.18–1.18 in)
Width: 150–150 mm (5.91–5.91 in)
Length: 500–900 mm (19.69–35.43 in)
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 H21
3 active listings and RFQs →
GB/T 1299 3Cr2W8V
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 H21 and GB/T 1299 3Cr2W8V?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A681 H21 be substituted with GB/T 1299 3Cr2W8V?
ASTM A681 H21 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.