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

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

BS 970 (Part 1) 226M44 (BS 970 (Part 1):1983) and JIS G4804 SUM43 (JIS G 4804:2021) are both steel grades. Both fall under the Free Machining Steel category. BS 970 (Part 1) 226M44 is typically used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6., while JIS G4804 SUM43 is commonly used for high speed automatic machining, automotive parts. BS 970 (Part 1) 226M44 is defined under British Standards (BS), originating from United Kingdom, while JIS G4804 SUM43 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, BS 970 (Part 1) 226M44 vs JIS G4804 SUM43 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 BS 970 (Part 1) 226M44:
SAE J403 1144 SAE J403 1144 SAE J403 1144 SAE J403 1117 SAE J403 1118 IS 1570 (Part 3) 10C8S10 IS 4432 10C8S10 SAE J403 1117 SAE J403 1117 SAE J403 1118 SAE J403 1118 SAE J403 1126
Match Breakdown
CHEMISTRY MATCH
90.7%
MECHANICAL MATCH
No shared data
OVERALL
90.7%
Specifications
Property BS 970 (Part 1) 226M44 JIS G4804 SUM43
Standard BS 970 (Part 1):1983 JIS G 4804:2021
Category Free Machining Steel Free Machining Steel
C (%) 0.40-0.48 0.40–0.48
Mn (%) 1.30-1.70 1.35–1.65
Si (%) <=0.25 Not specified
P (%) <=0.060 ≤0.040
S (%) 0.22-0.30 0.24–0.33
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 1) 226M44 JIS G4804 SUM43
Tensile Strength Not specified 540–690 MPa
Elongation Not specified ≥9%
Hardness Not specified 163–207 HB
Typical Applications
BS 970 (Part 1) 226M44
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
JIS G4804 SUM43
High speed automatic machining, automotive parts
Key Differences
Can BS 970 (Part 1) 226M44 Be Substituted With JIS G4804 SUM43?
BS 970 (Part 1) 226M44 and JIS G4804 SUM43 overlap closely enough on chemistry and mechanical properties that JIS G4804 SUM43 is often considered as a substitute for BS 970 (Part 1) 226M44 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
BS 970 (Part 1) 226M44
No active listings currently.
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)
On M-EX Right Now
BS 970 (Part 1) 226M44
0 active listings and RFQs →
JIS G4804 SUM43
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 226M44 and JIS G4804 SUM43?
BS 970 (Part 1) 226M44 specifies Si which is not specified for JIS G4804 SUM43.
Can BS 970 (Part 1) 226M44 be substituted with JIS G4804 SUM43?
BS 970 (Part 1) 226M44 and JIS G4804 SUM43 overlap closely enough on chemistry and mechanical properties that JIS G4804 SUM43 is often considered as a substitute for BS 970 (Part 1) 226M44 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.