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JIS G4051 S45C vs BS 970 (Part 1) 055M15

Minimal Match — 52.8% match based on chemical composition and mechanical property overlap.

JIS G4051 S45C (JIS G4051:2009) and BS 970 (Part 1) 055M15 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. JIS G4051 S45C is typically used for shafts, gears, bolts, machine parts, keys, while BS 970 (Part 1) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). JIS G4051 S45C is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 1) 055M15 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, JIS G4051 S45C vs BS 970 (Part 1) 055M15 is a 79.3% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 52.8%.

Frequently Compared With JIS G4051 S45C:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
79.3%
MECHANICAL MATCH
0%
OVERALL
52.8%
Specifications
Property JIS G4051 S45C BS 970 (Part 1) 055M15
Standard JIS G4051:2009 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.42-0.48 <=0.20
Si (%) 0.15-0.35 Not specified
Mn (%) 0.60-0.90 <=0.80
S (%) <=0.035 Not specified
P (%) <=0.030 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4051 S45C BS 970 (Part 1) 055M15
Tensile Strength >=570 MPa 310 MPa min
Yield Strength >=430 MPa Not specified
Elongation >=17% 25 % min
Hardness 167-229 HB 121 HB min
Condition Not specified As-rolled
Typical Applications
JIS G4051 S45C
Shafts, gears, bolts, machine parts, keys
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can JIS G4051 S45C Be Substituted With BS 970 (Part 1) 055M15?
JIS G4051 S45C and BS 970 (Part 1) 055M15 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 G4051 S45C
Round Bar → (6 listings)
Diameter: 7.5–40 mm (0.3–1.57 in)
Length: 5400–7000 mm (212.6–275.59 in)
BS 970 (Part 1) 055M15
No active listings currently.
On M-EX Right Now
JIS G4051 S45C
6 active listings and RFQs →
BS 970 (Part 1) 055M15
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4051 S45C and BS 970 (Part 1) 055M15?
JIS G4051 S45C specifies Si, S, P which are not specified for BS 970 (Part 1) 055M15.
Can JIS G4051 S45C be substituted with BS 970 (Part 1) 055M15?
JIS G4051 S45C and BS 970 (Part 1) 055M15 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.