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JIS G4804 SUM43 vs BS 970 (Part 1) 226M44

Strong Match — 90.7% match based on chemical composition and mechanical property overlap.

JIS G4804 SUM43 (JIS G 4804:2021) and BS 970 (Part 1) 226M44 (BS 970 (Part 1):1983) 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 BS 970 (Part 1) 226M44 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. JIS G4804 SUM43 is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 1) 226M44 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, JIS G4804 SUM43 vs BS 970 (Part 1) 226M44 is a 90.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 90.7%.

Frequently Compared With JIS G4804 SUM43:
SAE J403 1144 SAE J403 1144 SAE J403 1144 SAE J403 1141 IS 4432 10C8S10 SAE J403 1117 SAE J403 1126 SAE J403 1117 SAE J403 1117 SAE J403 1118 SAE J403 1141 SAE J403 1141
Match Breakdown
CHEMISTRY MATCH
90.7%
MECHANICAL MATCH
No shared data
OVERALL
90.7%
Specifications
Property JIS G4804 SUM43 BS 970 (Part 1) 226M44
Standard JIS G 4804:2021 BS 970 (Part 1):1983
Category Free Machining Steel Free Machining Steel
C (%) 0.40–0.48 0.40-0.48
Mn (%) 1.35–1.65 1.30-1.70
S (%) 0.24–0.33 0.22-0.30
P (%) ≤0.040 <=0.060
Si (%) Not specified <=0.25
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 BS 970 (Part 1) 226M44
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
BS 970 (Part 1) 226M44
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can JIS G4804 SUM43 Be Substituted With BS 970 (Part 1) 226M44?
JIS G4804 SUM43 and BS 970 (Part 1) 226M44 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 226M44 is often considered as a substitute for JIS G4804 SUM43 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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)
BS 970 (Part 1) 226M44
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On M-EX Right Now
JIS G4804 SUM43
2 active listings and RFQs →
BS 970 (Part 1) 226M44
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Frequently Asked Questions
What is the difference between JIS G4804 SUM43 and BS 970 (Part 1) 226M44?
BS 970 (Part 1) 226M44 specifies Si which is not specified for JIS G4804 SUM43.
Can JIS G4804 SUM43 be substituted with BS 970 (Part 1) 226M44?
JIS G4804 SUM43 and BS 970 (Part 1) 226M44 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 226M44 is often considered as a substitute for JIS G4804 SUM43 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.