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BS 970 EN9 vs BS 970 (Part 3) 070M55

Strong Match — 96% match based on chemical composition and mechanical property overlap.

BS 970 EN9 (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 EN9 is typically used for springs, chisels, punches, dies, while BS 970 (Part 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components.. BS 970 EN9 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 EN9 vs BS 970 (Part 3) 070M55 is a 96% 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 96%.

Frequently Compared With BS 970 EN9:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 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
Match Breakdown
CHEMISTRY MATCH
96%
MECHANICAL MATCH
No shared data
OVERALL
96%
Specifications
Property BS 970 EN9 BS 970 (Part 3) 070M55
Standard BS 970:1955 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.50-0.60 0.50-0.60
Si (%) 0.05-0.35 0.10-0.40
Mn (%) 0.50-0.80 0.50-0.90
S (%) <=0.060 <=0.05
P (%) <=0.060 <=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 EN9 BS 970 (Part 3) 070M55
Tensile Strength ≥695 MPa (45 tons/sq in, converted) Not specified
Yield Strength ≥355 MPa (23 tons/sq in, converted) Not specified
Elongation ≥18% Not specified
Hardness 201-255 HB Not specified
Condition Normalised, ruling section 4 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN9
Springs, chisels, punches, dies
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Can BS 970 EN9 Be Substituted With BS 970 (Part 3) 070M55?
BS 970 EN9 and BS 970 (Part 3) 070M55 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 070M55 is often considered as a substitute for BS 970 EN9 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 EN9
Round Bar → (3 listings)
Diameter: 70–70 mm (2.76–2.76 in)
Length: 5600–6900 mm (220.47–271.65 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 EN9
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 EN9 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 EN9 be substituted with BS 970 (Part 3) 070M55?
BS 970 EN9 and BS 970 (Part 3) 070M55 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 070M55 is often considered as a substitute for BS 970 EN9 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.