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ASTM A681 H43 vs GOST 5950 4H5MFS

Minimal Match — 38.2% match based on chemical composition and mechanical property overlap.

ASTM A681 H43 (ASTM A681:2008) and GOST 5950 4H5MFS (GOST 5950-2000) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 H43 is typically used for tools, dies and fixtures (clause 1.2), while GOST 5950 4H5MFS is commonly used for used for die casting dies, forging tools, extrusion dies, punches, and hot shear blades.. ASTM A681 H43 is defined under ASTM International (United States).

As per chemical composition, ASTM A681 H43 vs GOST 5950 4H5MFS is a 57.3% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 38.2%.

Frequently Compared With ASTM A681 H43:
IS 1570 (Part 6) 133T3 EN ISO 4957 1.2316 EN ISO 683-17 100Cr6 GB/T 1299 3Cr2W8V DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 103T3 GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV IS 1570 (Part 6) 118T3 GB/T 1299 4Cr5MoSiV1 IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
57.3%
MECHANICAL MATCH
0%
OVERALL
38.2%
Specifications
Property ASTM A681 H43 GOST 5950 4H5MFS
Standard ASTM A681:2008 GOST 5950-2000
Category Tool & Die Steels Tool & Die Steels
C (%) 0.50-0.65 0.35-0.45
Mn (%) 0.15-0.40 Not specified
P (%) <=0.030 Not specified
S (%) <=0.030 Not specified
Si (%) 0.20-0.45 0.8-1.2
Cr (%) 3.75-4.50 4.5-5.5
V (%) 1.80-2.20 0.3-0.6
Mo (%) 7.75-8.50 1.2-1.6
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 H43 GOST 5950 4H5MFS
Hardness <=235 HB 44-50 HRC
Condition Annealed (maximum Brinell hardness) Not specified
Tensile Strength Not specified 1350-1650 MPa
Yield Strength Not specified 1150 MPa min
Elongation Not specified 9% min
Typical Applications
ASTM A681 H43
Tools, dies and fixtures (clause 1.2)
GOST 5950 4H5MFS
Used for die casting dies, forging tools, extrusion dies, punches, and hot shear blades.
Key Differences
Can ASTM A681 H43 Be Substituted With GOST 5950 4H5MFS?
ASTM A681 H43 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
ASTM A681 H43
No active listings currently.
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
ASTM A681 H43
0 active listings and RFQs →
GOST 5950 4H5MFS
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 H43 and GOST 5950 4H5MFS?
ASTM A681 H43 specifies Mn, P, S which are not specified for GOST 5950 4H5MFS.
Can ASTM A681 H43 be substituted with GOST 5950 4H5MFS?
ASTM A681 H43 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.