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ASTM A681 H21 vs AISI 52100

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

ASTM A681 H21 (ASTM A681:2008) and AISI 52100 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 AISI 52100 is commonly used for anti-friction bearings, ball screws, precision rollers. ASTM A681 H21 is defined under ASTM International, originating from United States, while AISI 52100 is defined under AISI, originating from United States.

As per chemical composition, ASTM A681 H21 vs AISI 52100 is a 63.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ASTM A681 H21:
EN ISO 4957 1.2316 EN ISO 683-17 100Cr6 GB/T 1299 4Cr5MoSiV GB/T 1299 4Cr5MoSiV1 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 IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
63.1%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property ASTM A681 H21 AISI 52100
Standard ASTM A681:2008 AISI
Category Tool & Die Steels Tool & Die Steels
C (%) 0.26-0.36 0.93–1.05
Mn (%) 0.15-0.40 0.25–0.45
P (%) <=0.030 ≤0.025
S (%) <=0.030 ≤0.025
Si (%) 0.15-0.50 0.15–0.35
Cr (%) 3.00-3.75 1.35–1.60
V (%) 0.30-0.60 Not specified
W (%) 8.50-10.00 Not specified
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 AISI 52100
Hardness <=235 HB Not specified
Condition Annealed (maximum Brinell hardness) Not specified
Tensile Strength Not specified ≥620 MPa (annealed)
Hardness HRC Not specified 60–66 (hardened)
Hardness HB Not specified 179–229 (annealed)
Typical Applications
ASTM A681 H21
Hot extrusion dies, hot forging dies for brass/bronze
AISI 52100
Anti-friction bearings, ball screws, precision rollers
Key Differences
Can ASTM A681 H21 Be Substituted With AISI 52100?
ASTM A681 H21 and AISI 52100 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)
AISI 52100
Round Bar → (3 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3000–3200 mm (118.11–125.98 in)
On M-EX Right Now
ASTM A681 H21
3 active listings and RFQs →
AISI 52100
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 H21 and AISI 52100?
ASTM A681 H21 specifies V, W which are not specified for AISI 52100.
Can ASTM A681 H21 be substituted with AISI 52100?
ASTM A681 H21 and AISI 52100 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.