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KS D3752 SM45C vs BS 970 (Part 3) 070M55

Strong Match — 85.8% match based on chemical composition and mechanical property overlap.

KS D3752 SM45C (KS D 3752:2024) and BS 970 (Part 3) 070M55 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Carbon Steel category. KS D3752 SM45C is typically used for shafts, keys, gears, bolts, couplings, general machine parts requiring moderate strength., while BS 970 (Part 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components.. KS D3752 SM45C is defined under Korean Industrial Standards (KS), originating from South Korea, while BS 970 (Part 3) 070M55 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, KS D3752 SM45C vs BS 970 (Part 3) 070M55 is a 85.8% 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 85.8%.

Frequently Compared With KS D3752 SM45C:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
85.8%
MECHANICAL MATCH
No shared data
OVERALL
85.8%
Specifications
Property KS D3752 SM45C BS 970 (Part 3) 070M55
Standard KS D 3752:2024 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.42-0.48 0.50-0.60
Mn (%) 0.6-0.9 0.50-0.90
Si (%) 0.15-0.35 0.10-0.40
P (%) max 0.03 <=0.05
S (%) max 0.03 <=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 KS D3752 SM45C BS 970 (Part 3) 070M55
Tensile Strength 690 MPa min (quenched & tempered) Not specified
Yield Strength 490 MPa min Not specified
Elongation 17% min Not specified
Hardness HB 201-269 Not specified
Typical Applications
KS D3752 SM45C
Shafts, keys, gears, bolts, couplings, general machine parts requiring moderate strength.
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Can KS D3752 SM45C Be Substituted With BS 970 (Part 3) 070M55?
KS D3752 SM45C 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 KS D3752 SM45C 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
KS D3752 SM45C
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5700–6900 mm (224.41–271.65 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
KS D3752 SM45C
2 active listings and RFQs →
BS 970 (Part 3) 070M55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3752 SM45C 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 KS D3752 SM45C be substituted with BS 970 (Part 3) 070M55?
KS D3752 SM45C 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 KS D3752 SM45C in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.