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AISI 1050 vs BS 970 (Part 3) 070M55

Strong Match — 87.9% match based on chemical composition and mechanical property overlap.

AISI 1050 and BS 970 (Part 3) 070M55 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Carbon Steel category. AISI 1050 is typically used for used for gears, shafts, hand tools, springs, agricultural implements, and machine components., while BS 970 (Part 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components.. AISI 1050 is defined under AISI, originating from United States, while BS 970 (Part 3) 070M55 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, AISI 1050 vs BS 970 (Part 3) 070M55 is a 87.9% 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 87.9%.

Frequently Compared With AISI 1050:
BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 070M55 BS 970 (Part 1) 040A04 BS 970 (Part 3) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
87.9%
MECHANICAL MATCH
No shared data
OVERALL
87.9%
Specifications
Property AISI 1050 BS 970 (Part 3) 070M55
Standard AISI BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.48-0.55 0.50-0.60
Mn (%) 0.60-0.90 0.50-0.90
P (%) ≤0.030 <=0.05
S (%) 0.050 max <=0.05
Si (%) Not specified 0.10-0.40
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property AISI 1050 BS 970 (Part 3) 070M55
Condition Hot Rolled Not specified
Tensile Strength 590-660 MPa Not specified
Yield Strength 310-380 MPa Not specified
Elongation 15-20% Not specified
Hardness 170-197 HB Not specified
Typical Applications
AISI 1050
Used for gears, shafts, hand tools, springs, agricultural implements, and machine components.
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Key Differences
Can AISI 1050 Be Substituted With BS 970 (Part 3) 070M55?
AISI 1050 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 AISI 1050 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
AISI 1050
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5300–7000 mm (208.66–275.59 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
AISI 1050
2 active listings and RFQs →
BS 970 (Part 3) 070M55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AISI 1050 and BS 970 (Part 3) 070M55?
BS 970 (Part 3) 070M55 specifies Si which is not specified for AISI 1050.
Can AISI 1050 be substituted with BS 970 (Part 3) 070M55?
AISI 1050 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 AISI 1050 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.