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ASTM A681 H21 vs ASTM A681 H22

Strong Match — 85.6% match based on chemical composition and mechanical property overlap.

ASTM A681 H21 (ASTM A681:2008) and ASTM A681 H22 (ASTM A681:2008) 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 ASTM A681 H22 is commonly used for tools, dies and fixtures (clause 1.2). ASTM A681 H21 is defined under ASTM International, originating from United States, while ASTM A681 H22 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A681 H21 vs ASTM A681 H22 is a 78.3% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 85.6%.

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 GB/T 1299 3Cr2W8V GOST 5950 3H2W8F GOST 5950 4H5MFS1 GOST 5950 4H5MFS IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
78.3%
MECHANICAL MATCH
100%
OVERALL
85.6%
Specifications
Property ASTM A681 H21 ASTM A681 H22
Standard ASTM A681:2008 ASTM A681:2008
Category Tool & Die Steels Tool & Die Steels
C (%) 0.26-0.36 0.30-0.40
Mn (%) 0.15-0.40 0.15-0.40
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Si (%) 0.15-0.50 0.15-0.40
Cr (%) 3.00-3.75 1.75-3.75
V (%) 0.30-0.60 0.25-0.50
W (%) 8.50-10.00 10.00-11.75
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 ASTM A681 H22
Hardness <=235 HB <=235 HB
Condition Annealed (maximum Brinell hardness) Annealed (maximum Brinell hardness)
Typical Applications
ASTM A681 H21
Hot extrusion dies, hot forging dies for brass/bronze
ASTM A681 H22
Tools, dies and fixtures (clause 1.2)
Can ASTM A681 H21 Be Substituted With ASTM A681 H22?
ASTM A681 H21 and ASTM A681 H22 overlap closely enough on chemistry and mechanical properties that ASTM A681 H22 is often considered as a substitute for ASTM A681 H21 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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)
ASTM A681 H22
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On M-EX Right Now
ASTM A681 H21
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ASTM A681 H22
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Frequently Asked Questions
What is the difference between ASTM A681 H21 and ASTM A681 H22?
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 ASTM A681 H22?
ASTM A681 H21 and ASTM A681 H22 overlap closely enough on chemistry and mechanical properties that ASTM A681 H22 is often considered as a substitute for ASTM A681 H21 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.