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ASTM A681 H14 vs ASTM A681 H21

Close Alternative — 74.9% match based on chemical composition and mechanical property overlap.

ASTM A681 H14 (ASTM A681:2008) and ASTM A681 H21 (ASTM A681:2008) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 H14 is typically used for tools, dies and fixtures (clause 1.2), while ASTM A681 H21 is commonly used for hot extrusion dies, hot forging dies for brass/bronze. ASTM A681 H14 is defined under ASTM International, originating from United States, while ASTM A681 H21 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A681 H14 vs ASTM A681 H21 is a 62.3% match. As per mechanical properties, the match is 100%. Combined, this makes them a close alternative overall at 74.9%.

Frequently Compared With ASTM A681 H14:
IS 1570 (Part 6) 118T3 GB/T 1299 3Cr2W8V GOST 5950 4H5MFS1 EN ISO 4957 1.2316 DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 133T3 GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV1 DIN EN ISO 4957 1.2344 EN ISO 683-17 100Cr6 IS 1570 (Part 6) 103T3 GB/T 1299 4Cr5MoSiV
Match Breakdown
CHEMISTRY MATCH
62.3%
MECHANICAL MATCH
100%
OVERALL
74.9%
Specifications
Property ASTM A681 H14 ASTM A681 H21
Standard ASTM A681:2008 ASTM A681:2008
Category Tool & Die Steels Tool & Die Steels
C (%) 0.35-0.45 0.26-0.36
Mn (%) 0.20-0.60 0.15-0.40
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Si (%) 0.80-1.25 0.15-0.50
Cr (%) 4.75-5.50 3.00-3.75
W (%) 4.00-5.25 8.50-10.00
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 H14 ASTM A681 H21
Hardness <=235 HB <=235 HB
Condition Annealed (maximum Brinell hardness) Annealed (maximum Brinell hardness)
Typical Applications
ASTM A681 H14
Tools, dies and fixtures (clause 1.2)
ASTM A681 H21
Hot extrusion dies, hot forging dies for brass/bronze
Key Differences
Can ASTM A681 H14 Be Substituted With ASTM A681 H21?
ASTM A681 H14 and ASTM A681 H21 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 H14
No active listings currently.
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)
On M-EX Right Now
ASTM A681 H14
0 active listings and RFQs →
ASTM A681 H21
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 H14 and ASTM A681 H21?
ASTM A681 H21 specifies V which is not specified for ASTM A681 H14.
Can ASTM A681 H14 be substituted with ASTM A681 H21?
ASTM A681 H14 and ASTM A681 H21 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.