Post Stock Login Register

BS 970 EN3A vs BS 970 (Part 3) 070M55

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

BS 970 EN3A (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 EN3A is typically used for bolts, screws, light structural components, while BS 970 (Part 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components.. BS 970 EN3A 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 EN3A vs BS 970 (Part 3) 070M55 is a 87.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With BS 970 EN3A:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 3) 070M20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045M10 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 3) 045M10 BS 970 (Part 1) 070M20
Match Breakdown
CHEMISTRY MATCH
87.7%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property BS 970 EN3A BS 970 (Part 3) 070M55
Standard BS 970:1955 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.15-0.25 0.50-0.60
Si (%) 0.05-0.35 0.10-0.40
Mn (%) 0.40-0.90 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 EN3A BS 970 (Part 3) 070M55
Tensile Strength ≥432 MPa (28 tons/sq in, converted) Not specified
Elongation ≥25% Not specified
Condition , ruling section 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN3A
Bolts, screws, light structural components
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Can BS 970 EN3A Be Substituted With BS 970 (Part 3) 070M55?
BS 970 EN3A and BS 970 (Part 3) 070M55 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
BS 970 EN3A
Round Bar → (5 listings)
Diameter: 40–45 mm (1.57–1.77 in)
Length: 5100–7000 mm (200.79–275.59 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 EN3A
5 active listings and RFQs →
BS 970 (Part 3) 070M55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN3A 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 EN3A be substituted with BS 970 (Part 3) 070M55?
BS 970 EN3A and BS 970 (Part 3) 070M55 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.