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BS 970 EN5B vs JIS G4051 S30C

Strong Match — 92.1% match based on chemical composition and mechanical property overlap.

BS 970 EN5B (BS 970:1955) and JIS G4051 S30C (JIS G4051:2009) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN5B is typically used for mechanical properties are not part of the contractual obligations of specifications en 5a, en 5b and en 5c., while JIS G4051 S30C is commonly used for shafts, gears, bolts, machine parts. BS 970 EN5B is defined under British Standards (BS), originating from United Kingdom, while JIS G4051 S30C is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, BS 970 EN5B vs JIS G4051 S30C is a 92.1% 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 92.1%.

Frequently Compared With BS 970 EN5B:
BS 970 (Part 1) 040A12 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40
Match Breakdown
CHEMISTRY MATCH
92.1%
MECHANICAL MATCH
No shared data
OVERALL
92.1%
Specifications
Property BS 970 EN5B JIS G4051 S30C
Standard BS 970:1955 JIS G4051:2009
Category Carbon Steel Carbon Steel
C (%) 0.28-0.33 0.27-0.33
Si (%) 0.05-0.35 0.15-0.35
Mn (%) 0.70-0.90 0.60-0.90
S (%) <=0.060 <=0.035
P (%) <=0.060 <=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 BS 970 EN5B JIS G4051 S30C
Tensile Strength Not specified >=490 MPa
Elongation Not specified >=20%
Hardness Not specified <=156 HB
Typical Applications
BS 970 EN5B
Mechanical properties are not part of the contractual obligations of specifications En 5A, En 5B and En 5C.
JIS G4051 S30C
Shafts, gears, bolts, machine parts
Can BS 970 EN5B Be Substituted With JIS G4051 S30C?
BS 970 EN5B and JIS G4051 S30C overlap closely enough on chemistry and mechanical properties that JIS G4051 S30C is often considered as a substitute for BS 970 EN5B 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 EN5B
No active listings currently.
JIS G4051 S30C
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5300–7000 mm (208.66–275.59 in)
On M-EX Right Now
BS 970 EN5B
0 active listings and RFQs →
JIS G4051 S30C
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN5B and JIS G4051 S30C?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN5B be substituted with JIS G4051 S30C?
BS 970 EN5B and JIS G4051 S30C overlap closely enough on chemistry and mechanical properties that JIS G4051 S30C is often considered as a substitute for BS 970 EN5B in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.