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AISI D2 KNL vs GOST 5950 4H5MFS

Minimal Match — 43.2% match based on chemical composition and mechanical property overlap.

AISI D2 KNL (ASTM A681) and GOST 5950 4H5MFS (GOST 5950-2000) 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 GOST 5950 4H5MFS is commonly used for used for die casting dies, forging tools, extrusion dies, punches, and hot shear blades.. AISI D2 KNL is defined under AISI (United States).

As per chemical composition, AISI D2 KNL vs GOST 5950 4H5MFS is a 64.9% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 43.2%.

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 3H2W8F GOST 5950 4H5MFS1 AISI 52100 IS 1570 (Part 6) 103T3 IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
64.9%
MECHANICAL MATCH
0%
OVERALL
43.2%
Specifications
Property AISI D2 KNL GOST 5950 4H5MFS
Standard ASTM A681 GOST 5950-2000
Category Tool & Die Steels Tool & Die Steels
C (%) 1.40–1.60 0.35-0.45
Mn (%) ≤0.60 Not specified
Si (%) ≤0.40 0.8-1.2
Cr (%) 11.00–13.00 4.5-5.5
Mo (%) 0.70–1.20 1.2-1.6
V (%) ≤1.00 0.3-0.6
S (%) ≤0.030 Not specified
P (%) ≤0.030 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 AISI D2 KNL GOST 5950 4H5MFS
Hardness (annealed) ≤255 HB Not specified
Hardness (hardened) 58–62 HRC Not specified
Compressive Strength 2600 MPa Not specified
Tensile Strength Not specified 1350-1650 MPa
Yield Strength Not specified 1150 MPa min
Elongation Not specified 9% min
Hardness Not specified 44-50 HRC
Typical Applications
AISI D2 KNL
Blanking dies, forming dies, thread rolling dies, punches, shear blades, gauges, broaches, drawing dies
GOST 5950 4H5MFS
Used for die casting dies, forging tools, extrusion dies, punches, and hot shear blades.
Key Differences
Can AISI D2 KNL Be Substituted With GOST 5950 4H5MFS?
AISI D2 KNL and GOST 5950 4H5MFS 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)
GOST 5950 4H5MFS
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2500–2700 mm (98.43–106.3 in)
On M-EX Right Now
AISI D2 KNL
2 active listings and RFQs →
GOST 5950 4H5MFS
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AISI D2 KNL and GOST 5950 4H5MFS?
AISI D2 KNL specifies Mn, S, P which are not specified for GOST 5950 4H5MFS.
Can AISI D2 KNL be substituted with GOST 5950 4H5MFS?
AISI D2 KNL and GOST 5950 4H5MFS 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.