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JIS G4053 SMn438 vs BS 970 (Part 3) 070M55

Close Alternative — 83.8% match based on chemical composition and mechanical property overlap.

JIS G4053 SMn438 (JIS G4053:2008) and BS 970 (Part 3) 070M55 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Carbon Steel category. JIS G4053 SMn438 is typically used for agricultural equipment, heavy duty shafts, while BS 970 (Part 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components.. JIS G4053 SMn438 is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 3) 070M55 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, JIS G4053 SMn438 vs BS 970 (Part 3) 070M55 is a 83.8% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 83.8%.

Frequently Compared With JIS G4053 SMn438:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
83.8%
MECHANICAL MATCH
No shared data
OVERALL
83.8%
Specifications
Property JIS G4053 SMn438 BS 970 (Part 3) 070M55
Standard JIS G4053:2008 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.35–0.41 0.50-0.60
Si (%) 0.15–0.35 0.10-0.40
Mn (%) 1.35–1.65 0.50-0.90
S (%) ≤0.030 <=0.05
P (%) ≤0.030 <=0.05
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4053 SMn438 BS 970 (Part 3) 070M55
Tensile Strength ≥690 MPa Not specified
Yield Strength ≥540 MPa Not specified
Elongation ≥15% Not specified
Typical Applications
JIS G4053 SMn438
Agricultural equipment, heavy duty shafts
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Can JIS G4053 SMn438 Be Substituted With BS 970 (Part 3) 070M55?
JIS G4053 SMn438 and BS 970 (Part 3) 070M55 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
JIS G4053 SMn438
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6000–6300 mm (236.22–248.03 in)
BS 970 (Part 3) 070M55
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4800–5800 mm (188.98–228.35 in)
On M-EX Right Now
JIS G4053 SMn438
2 active listings and RFQs →
BS 970 (Part 3) 070M55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4053 SMn438 and BS 970 (Part 3) 070M55?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can JIS G4053 SMn438 be substituted with BS 970 (Part 3) 070M55?
JIS G4053 SMn438 and BS 970 (Part 3) 070M55 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.