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AISI D2 KNL vs ASTM A681 A5

Related Material — 66.2% match based on chemical composition and mechanical property overlap.

AISI D2 KNL (ASTM A681) and ASTM A681 A5 (ASTM A681:2008) are both steel grades. Both fall under the Tool & Die Steels category. AISI D2 KNL is typically used for blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies, while ASTM A681 A5 is commonly used for tools, dies and fixtures (clause 1.2). AISI D2 KNL is defined under AISI, originating from United States, while ASTM A681 A5 is defined under ASTM International, originating from United States.

As per chemical composition, AISI D2 KNL vs ASTM A681 A5 is a 66.2% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 66.2%.

Frequently Compared With AISI D2 KNL:
DIN EN ISO 4957 1.2379 EN ISO 683-17 100Cr6 GB/T 1299 3Cr2W8V DIN EN ISO 4957 1.2344 EN ISO 4957 1.2316 GB/T 1299 4Cr5MoSiV GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS GOST 5950 3H2W8F GOST 5950 4H5MFS1 AISI 52100 IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
66.2%
MECHANICAL MATCH
No shared data
OVERALL
66.2%
Specifications
Property AISI D2 KNL ASTM A681 A5
Standard ASTM A681 ASTM A681:2008
Category Tool & Die Steels Tool & Die Steels
C (%) 1.40–1.60 0.95-1.05
Mn (%) ≤0.60 2.80-3.20
Si (%) ≤0.40 0.10-0.70
Cr (%) 11.00–13.00 0.90-1.40
Mo (%) 0.70–1.20 0.90-1.40
V (%) ≤1.00 Not specified
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 AISI D2 KNL ASTM A681 A5
Hardness (annealed) ≤255 HB Not specified
Hardness (hardened) 58–62 HRC Not specified
Compressive Strength 2600 MPa Not specified
Typical Applications
AISI D2 KNL
Blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies
ASTM A681 A5
Tools, dies and fixtures (clause 1.2)
Key Differences
Can AISI D2 KNL Be Substituted With ASTM A681 A5?
AISI D2 KNL and ASTM A681 A5 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
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)
ASTM A681 A5
No active listings currently.
On M-EX Right Now
AISI D2 KNL
2 active listings and RFQs →
ASTM A681 A5
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between AISI D2 KNL and ASTM A681 A5?
AISI D2 KNL specifies V which is not specified for ASTM A681 A5.
Can AISI D2 KNL be substituted with ASTM A681 A5?
AISI D2 KNL and ASTM A681 A5 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.