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ASTM A681 P4 vs SAE J404 4120

Related Material — 65% match based on chemical composition and mechanical property overlap.

ASTM A681 P4 (ASTM A681:2008) and SAE J404 4120 (SAE J404:2009) are both steel grades. ASTM A681 P4 is classified under Tool & Die Steels, while SAE J404 4120 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. ASTM A681 P4 is typically used for tools, dies and fixtures (clause 1.2), while SAE J404 4120 is commonly used for used for gears, crankshafts, studs, pins, machinery parts, and transmission components.. ASTM A681 P4 is defined under ASTM International, originating from United States, while SAE J404 4120 is defined under SAE International, originating from United States.

As per chemical composition, ASTM A681 P4 vs SAE J404 4120 is a 67.8% 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 65%.

Frequently Compared With ASTM A681 P4:
GB/T 1299 4Cr5MoSiV EN ISO 683-17 100Cr6 GOST 5950 4H5MFS DIN EN ISO 4957 1.2379 GOST 5950 4H5MFS1 EN ISO 4957 1.2316 DIN EN ISO 4957 1.2344 IS 1570 (Part 6) 103T3 IS 1570 (Part 6) 118T3 IS 1570 (Part 6) 133T3 GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV1
Match Breakdown
CHEMISTRY MATCH
67.8%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property ASTM A681 P4 SAE J404 4120
Standard ASTM A681:2008 SAE J404:2009
Category Tool & Die Steels Alloy Steel
C (%) <=0.12 0.18-0.23
Mn (%) 0.20-0.60 0.90-1.20
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.040
Si (%) 0.10-0.40 0.15-0.35
Cr (%) 4.00-5.25 0.40-0.60
Mo (%) 0.40-1.00 0.13-0.20
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 P4 SAE J404 4120
Hardness <=131 HB Not specified
Condition Annealed (maximum Brinell hardness) Not specified
Typical Applications
ASTM A681 P4
Tools, dies and fixtures (clause 1.2)
SAE J404 4120
Used for gears, crankshafts, studs, pins, machinery parts, and transmission components.
Key Differences
Can ASTM A681 P4 Be Substituted With SAE J404 4120?
ASTM A681 P4 and SAE J404 4120 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 P4
No active listings currently.
SAE J404 4120
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5800–6100 mm (228.35–240.16 in)
On M-EX Right Now
ASTM A681 P4
0 active listings and RFQs →
SAE J404 4120
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 P4 and SAE J404 4120?
Different category: ASTM A681 P4 is Tool & Die Steels, SAE J404 4120 is Alloy Steel.
Can ASTM A681 P4 be substituted with SAE J404 4120?
ASTM A681 P4 and SAE J404 4120 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.