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ASTM A681 H23 vs GOST 5950 4H5MFS1

Minimal Match — 32.8% match based on chemical composition and mechanical property overlap.

ASTM A681 H23 (ASTM A681:2008) and GOST 5950 4H5MFS1 (GOST 5950-2000) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 H23 is typically used for tools, dies and fixtures (clause 1.2), while GOST 5950 4H5MFS1 is commonly used for used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.. ASTM A681 H23 is defined under ASTM International (United States).

As per chemical composition, ASTM A681 H23 vs GOST 5950 4H5MFS1 is a 49.2% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 32.8%.

Frequently Compared With ASTM A681 H23:
EN ISO 683-17 100Cr6 IS 1570 (Part 6) 103T3 GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV GOST 5950 4H5MFS DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 118T3 DIN EN ISO 4957 1.2344 IS 1570 (Part 6) 133T3 GB/T 1299 3Cr2W8V GB/T 1299 4Cr5MoSiV1 EN ISO 4957 1.2316
Match Breakdown
CHEMISTRY MATCH
49.2%
MECHANICAL MATCH
0%
OVERALL
32.8%
Specifications
Property ASTM A681 H23 GOST 5950 4H5MFS1
Standard ASTM A681:2008 GOST 5950-2000
Category Tool & Die Steels Tool & Die Steels
C (%) 0.25-0.35 0.35-0.45
Mn (%) 0.15-0.40 Not specified
P (%) <=0.030 Not specified
S (%) <=0.030 Not specified
Si (%) 0.15-0.60 0.8-1.2
Cr (%) 11.00-12.75 4.5-5.5
V (%) 0.75-1.25 0.3-0.6
W (%) 11.00-12.75 Not specified
Mo (%) Not specified 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 H23 GOST 5950 4H5MFS1
Hardness <=255 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 H23
Tools, dies and fixtures (clause 1.2)
GOST 5950 4H5MFS1
Used for forging dies, pressure casting dies, hot punches, extrusion tooling, and die inserts.
Key Differences
Can ASTM A681 H23 Be Substituted With GOST 5950 4H5MFS1?
ASTM A681 H23 and GOST 5950 4H5MFS1 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 H23
No active listings currently.
GOST 5950 4H5MFS1
Round Bar → (2 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3000–3100 mm (118.11–122.05 in)
On M-EX Right Now
ASTM A681 H23
0 active listings and RFQs →
GOST 5950 4H5MFS1
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 H23 and GOST 5950 4H5MFS1?
ASTM A681 H23 specifies Mn, P, S, W which are not specified for GOST 5950 4H5MFS1. GOST 5950 4H5MFS1 specifies Mo which is not specified for ASTM A681 H23.
Can ASTM A681 H23 be substituted with GOST 5950 4H5MFS1?
ASTM A681 H23 and GOST 5950 4H5MFS1 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.