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ASTM A681 F2 vs ASTM A681 H21

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

ASTM A681 F2 (ASTM A681:2008) and ASTM A681 H21 (ASTM A681:2008) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 F2 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 F2 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 F2 vs ASTM A681 H21 is a 67.6% match. As per mechanical properties, the match is 100%. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With ASTM A681 F2:
EN ISO 4957 1.2316 DIN EN ISO 4957 1.2379 EN ISO 683-17 100Cr6 IS 1570 (Part 6) 103T3 IS 1570 (Part 6) 118T3 GB/T 1299 4Cr5MoSiV GOST 5950 4H5MFS GOST 5950 4H5MFS1 DIN EN ISO 4957 1.2344 IS 1570 (Part 6) 133T3 GB/T 1299 3Cr2W8V GOST 5950 3H2W8F
Match Breakdown
CHEMISTRY MATCH
67.6%
MECHANICAL MATCH
100%
OVERALL
69.9%
Specifications
Property ASTM A681 F2 ASTM A681 H21
Standard ASTM A681:2008 ASTM A681:2008
Category Tool & Die Steels Tool & Die Steels
C (%) 1.20-1.40 0.26-0.36
Mn (%) 0.10-0.50 0.15-0.40
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Si (%) 0.10-0.50 0.15-0.50
Cr (%) 0.20-0.40 3.00-3.75
W (%) 3.00-4.50 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 F2 ASTM A681 H21
Hardness <=235 HB <=235 HB
Condition Annealed (maximum Brinell hardness) Annealed (maximum Brinell hardness)
Typical Applications
ASTM A681 F2
Tools, dies and fixtures (clause 1.2)
ASTM A681 H21
Hot extrusion dies, hot forging dies for brass/bronze
Key Differences
Can ASTM A681 F2 Be Substituted With ASTM A681 H21?
ASTM A681 F2 and ASTM A681 H21 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 F2
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 F2
0 active listings and RFQs →
ASTM A681 H21
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 F2 and ASTM A681 H21?
ASTM A681 H21 specifies V which is not specified for ASTM A681 F2.
Can ASTM A681 F2 be substituted with ASTM A681 H21?
ASTM A681 F2 and ASTM A681 H21 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.