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JIS G4804 SUM43 vs SAE J403 1126

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

JIS G4804 SUM43 (JIS G 4804:2021) and SAE J403 1126 (SAE J403:2014) are both steel grades. Both fall under the Free Machining Steel category. JIS G4804 SUM43 is typically used for high speed automatic machining, automotive parts, while SAE J403 1126 is commonly used for chemistry-only grade; product scope as listed in the composition notes. JIS G4804 SUM43 is defined under Japanese Industrial Standards (JIS), originating from Japan, while SAE J403 1126 is defined under SAE International, originating from United States.

As per chemical composition, JIS G4804 SUM43 vs SAE J403 1126 is a 78.5% 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 69.9%.

Frequently Compared With JIS G4804 SUM43:
SAE J403 1144 SAE J403 1144 SAE J403 1144 IS 4432 10C8S10 SAE J403 1141 SAE J403 1117 SAE J403 1141 SAE J403 1117 SAE J403 1117 SAE J403 1118 SAE J403 1141 IS 1570 (Part 3) 10C8S10
Match Breakdown
CHEMISTRY MATCH
78.5%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property JIS G4804 SUM43 SAE J403 1126
Standard JIS G 4804:2021 SAE J403:2014
Category Free Machining Steel Free Machining Steel
C (%) 0.40–0.48 0.23-0.29
Mn (%) 1.35–1.65 0.70-1.00
S (%) 0.24–0.33 0.08-0.13
P (%) ≤0.040 <=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 JIS G4804 SUM43 SAE J403 1126
Tensile Strength 540–690 MPa Not specified
Elongation ≥9% Not specified
Hardness 163–207 HB Not specified
Typical Applications
JIS G4804 SUM43
High speed automatic machining, automotive parts
SAE J403 1126
Chemistry-only grade; product scope as listed in the composition notes
Can JIS G4804 SUM43 Be Substituted With SAE J403 1126?
JIS G4804 SUM43 and SAE J403 1126 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
JIS G4804 SUM43
Hex Bar → (2 listings)
Across Flats: 25–25 mm (0.98–0.98 in)
Length: 2600–3200 mm (102.36–125.98 in)
SAE J403 1126
No active listings currently.
On M-EX Right Now
JIS G4804 SUM43
2 active listings and RFQs →
SAE J403 1126
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Frequently Asked Questions
What is the difference between JIS G4804 SUM43 and SAE J403 1126?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can JIS G4804 SUM43 be substituted with SAE J403 1126?
JIS G4804 SUM43 and SAE J403 1126 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.