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BS 970 EN15 vs BS 970 (Part 3) 070M55

Close Alternative — 84.8% match based on chemical composition and mechanical property overlap.

BS 970 EN15 (BS 970:1955) and BS 970 (Part 3) 070M55 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN15 is typically used for heavy duty shafts, couplings, general engineering, while BS 970 (Part 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components.. BS 970 EN15 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 3) 070M55 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN15 vs BS 970 (Part 3) 070M55 is a 84.8% 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 84.8%.

Frequently Compared With BS 970 EN15:
BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 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
Match Breakdown
CHEMISTRY MATCH
84.8%
MECHANICAL MATCH
No shared data
OVERALL
84.8%
Specifications
Property BS 970 EN15 BS 970 (Part 3) 070M55
Standard BS 970:1955 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.30-0.40 0.50-0.60
Si (%) 0.10-0.35 0.10-0.40
Mn (%) 1.30-1.70 0.50-0.90
S (%) <=0.050 <=0.05
P (%) <=0.050 <=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 BS 970 EN15 BS 970 (Part 3) 070M55
Tensile Strength ≥618 MPa (40 tons/sq in, converted) Not specified
Yield Strength ≥432 MPa (28 tons/sq in, converted) Not specified
Elongation ≥22% Not specified
Hardness 179-229 HB Not specified
Condition Hardened and tempered Q, ruling section 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN15
Heavy duty shafts, couplings, general engineering
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Can BS 970 EN15 Be Substituted With BS 970 (Part 3) 070M55?
BS 970 EN15 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
BS 970 EN15
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5500–6400 mm (216.54–251.97 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
BS 970 EN15
3 active listings and RFQs →
BS 970 (Part 3) 070M55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN15 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 BS 970 EN15 be substituted with BS 970 (Part 3) 070M55?
BS 970 EN15 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.