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ASTM A681 P21 vs DIN EN ISO 4957 1.2344

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

ASTM A681 P21 (ASTM A681:2008) and DIN EN ISO 4957 1.2344 (DIN EN ISO 4957:2018-11) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 P21 is typically used for tools, dies and fixtures (clause 1.2), while DIN EN ISO 4957 1.2344 is commonly used for die casting dies, extrusion dies, forging dies, hot shear blades, mandrels, pressure die casting tooling. ASTM A681 P21 is defined under ASTM International, originating from United States, while DIN EN ISO 4957 1.2344 is defined under European Standard (EN), originating from Europe.

As per chemical composition, ASTM A681 P21 vs DIN EN ISO 4957 1.2344 is a 48.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ASTM A681 P21:
DIN EN ISO 4957 1.2379 GB/T 1299 4Cr5MoSiV IS 1570 (Part 6) 103T3 GOST 5950 4H5MFS1 EN ISO 4957 1.2316 EN ISO 683-17 100Cr6 IS 1570 (Part 6) 118T3 IS 1570 (Part 6) 133T3 GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS GB/T 1299 3Cr2W8V
Match Breakdown
CHEMISTRY MATCH
48.3%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property ASTM A681 P21 DIN EN ISO 4957 1.2344
Standard ASTM A681:2008 DIN EN ISO 4957:2018-11
Category Tool & Die Steels Tool & Die Steels
C (%) 0.18-0.22 0.37–0.43
Mn (%) 0.20-0.40 0.30–0.50
P (%) <=0.030 ≤0.030
S (%) <=0.030 ≤0.030
Si (%) 0.20-0.40 0.90–1.20
Cr (%) 0.20-0.30 4.80–5.50
V (%) 0.15-0.25 0.90–1.10
Ni (%) 3.90-4.25 Not specified
Al (%) 1.05-1.25 Not specified
Mo (%) Not specified 1.20–1.50
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 P21 DIN EN ISO 4957 1.2344
Hardness (annealed) Not specified ≤229 HB
Hardness (hardened) Not specified 44–52 HRC
Tensile Strength Not specified 1200–1600 MPa
Elongation Not specified ≥8%
Typical Applications
ASTM A681 P21
Tools, dies and fixtures (clause 1.2)
DIN EN ISO 4957 1.2344
Die casting dies, extrusion dies, forging dies, hot shear blades, mandrels, pressure die casting tooling
Key Differences
Can ASTM A681 P21 Be Substituted With DIN EN ISO 4957 1.2344?
ASTM A681 P21 and DIN EN ISO 4957 1.2344 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 P21
No active listings currently.
DIN EN ISO 4957 1.2344
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3000–3700 mm (118.11–145.67 in)
On M-EX Right Now
ASTM A681 P21
0 active listings and RFQs →
DIN EN ISO 4957 1.2344
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 P21 and DIN EN ISO 4957 1.2344?
ASTM A681 P21 specifies Ni, Al which are not specified for DIN EN ISO 4957 1.2344. DIN EN ISO 4957 1.2344 specifies Mo which is not specified for ASTM A681 P21.
Can ASTM A681 P21 be substituted with DIN EN ISO 4957 1.2344?
ASTM A681 P21 and DIN EN ISO 4957 1.2344 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.