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ASTM A681 H21 vs IS 1570 (Part 6) XT33W9Cr3V4

Close Alternative — 82.9% match based on chemical composition and mechanical property overlap.

ASTM A681 H21 (ASTM A681:2008) and IS 1570 (Part 6) XT33W9Cr3V4 (IS 1570 (Part 6):1996) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 H21 is defined under ASTM International, originating from United States, while IS 1570 (Part 6) XT33W9Cr3V4 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, ASTM A681 H21 vs IS 1570 (Part 6) XT33W9Cr3V4 is a 82.9% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 82.9%.

Frequently Compared With ASTM A681 H21:
EN ISO 683-17 100Cr6 EN ISO 4957 1.2316 GB/T 1299 4Cr5MoSiV GB/T 1299 4Cr5MoSiV1 AISI 52100 DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 GB/T 1299 3Cr2W8V GOST 5950 4H5MFS1 GOST 5950 3H2W8F GOST 5950 4H5MFS IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
82.9%
MECHANICAL MATCH
No shared data
OVERALL
82.9%
Specifications
Property ASTM A681 H21 IS 1570 (Part 6) XT33W9Cr3V4
Standard ASTM A681:2008 IS 1570 (Part 6):1996
Category Tool & Die Steels Tool & Die Steels
C (%) 0.26-0.36 0.25-0.40
Mn (%) 0.15-0.40 0.20-0.40
P (%) <=0.030 <=0.035
S (%) <=0.030 <=0.035
Si (%) 0.15-0.50 0.10-0.35
Cr (%) 3.00-3.75 2.80-3.30
V (%) 0.30-0.60 0.25-0.50
W (%) 8.50-10.00 8.0-10.0
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 IS 1570 (Part 6) XT33W9Cr3V4
Hardness <=235 HB Not specified
Condition Annealed (maximum Brinell hardness) Not specified
Typical Applications
ASTM A681 H21
Hot extrusion dies, hot forging dies for brass/bronze
IS 1570 (Part 6) XT33W9Cr3V4
Not documented
Can ASTM A681 H21 Be Substituted With IS 1570 (Part 6) XT33W9Cr3V4?
ASTM A681 H21 and IS 1570 (Part 6) XT33W9Cr3V4 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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)
IS 1570 (Part 6) XT33W9Cr3V4
No active listings currently.
On M-EX Right Now
ASTM A681 H21
3 active listings and RFQs →
IS 1570 (Part 6) XT33W9Cr3V4
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 H21 and IS 1570 (Part 6) XT33W9Cr3V4?
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 IS 1570 (Part 6) XT33W9Cr3V4?
ASTM A681 H21 and IS 1570 (Part 6) XT33W9Cr3V4 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.