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DIN EN ISO 4957 1.2379 vs AISI D2 KNL

Close Alternative — 84.3% match based on chemical composition and mechanical property overlap.

DIN EN ISO 4957 1.2379 (DIN EN ISO 4957:2018-11) and AISI D2 KNL (ASTM A681) are both steel grades. Both fall under the Tool & Die Steels category. DIN EN ISO 4957 1.2379 is typically used for blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies, while AISI D2 KNL is commonly used for blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies. DIN EN ISO 4957 1.2379 is defined under European Standard (EN), originating from Europe, while AISI D2 KNL is defined under AISI, originating from United States.

As per chemical composition, DIN EN ISO 4957 1.2379 vs AISI D2 KNL is a 76.5% match. As per mechanical properties, the match is 100%. Combined, this makes them a close alternative overall at 84.3%.

Frequently Compared With DIN EN ISO 4957 1.2379:
EN ISO 683-17 100Cr6 GB/T 1299 4Cr5MoSiV GOST 5950 4H5MFS IS 1570 (Part 6) 133T3 IS 1570 (Part 6) 55T8 AISI 52100 IS 1570 (Part 6) 103T3 IS 1570 (Part 6) 50T8 IS 1570 (Part 6) 65T6 IS 1570 (Part 6) 75T6 IS 1570 (Part 6) 60T6 IS 1570 (Part 6) 70T3
Match Breakdown
CHEMISTRY MATCH
76.5%
MECHANICAL MATCH
100%
OVERALL
84.3%
Specifications
Property DIN EN ISO 4957 1.2379 AISI D2 KNL
Standard DIN EN ISO 4957:2018-11 ASTM A681
Category Tool & Die Steels Tool & Die Steels
C (%) 1.50–1.60 1.40–1.60
Mn (%) 0.25–0.60 ≤0.60
Si (%) 0.10–0.40 ≤0.40
Cr (%) 11.00–13.00 11.00–13.00
Mo (%) 0.70–1.00 0.70–1.20
V (%) 0.80–1.10 ≤1.00
S (%) ≤0.030 ≤0.030
P (%) ≤0.030 ≤0.030
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property DIN EN ISO 4957 1.2379 AISI D2 KNL
Hardness (annealed) ≤255 HB ≤255 HB
Hardness (hardened) 58–62 HRC 58–62 HRC
Compressive Strength 2600 MPa 2600 MPa
Typical Applications
DIN EN ISO 4957 1.2379
Blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies
AISI D2 KNL
Blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies
Can DIN EN ISO 4957 1.2379 Be Substituted With AISI D2 KNL?
DIN EN ISO 4957 1.2379 and AISI D2 KNL 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
DIN EN ISO 4957 1.2379
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2800–3300 mm (110.24–129.92 in)
AISI D2 KNL
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2500–3600 mm (98.43–141.73 in)
On M-EX Right Now
DIN EN ISO 4957 1.2379
2 active listings and RFQs →
AISI D2 KNL
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between DIN EN ISO 4957 1.2379 and AISI D2 KNL?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can DIN EN ISO 4957 1.2379 be substituted with AISI D2 KNL?
DIN EN ISO 4957 1.2379 and AISI D2 KNL 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.