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KS D3752 SM45C vs BS 970 (Part 1) 040A12

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

KS D3752 SM45C (KS D 3752:2024) and BS 970 (Part 1) 040A12 (BS 970 (Part 1):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 1) 040A12 is commonly used for as-rolled, or as-rolled and softened, steel (section two). KS D3752 SM45C is defined under Korean Industrial Standards (KS), originating from South Korea, while BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, KS D3752 SM45C vs BS 970 (Part 1) 040A12 is a 77.7% 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 KS D3752 SM45C:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 045A10
Match Breakdown
CHEMISTRY MATCH
77.7%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property KS D3752 SM45C BS 970 (Part 1) 040A12
Standard KS D 3752:2024 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.42-0.48 0.10-0.15
Mn (%) 0.6-0.9 0.30-0.50
Si (%) 0.15-0.35 Not specified
P (%) max 0.03 Not specified
S (%) max 0.03 Not specified
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 1) 040A12
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 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can KS D3752 SM45C Be Substituted With BS 970 (Part 1) 040A12?
KS D3752 SM45C and BS 970 (Part 1) 040A12 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
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 1) 040A12
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On M-EX Right Now
KS D3752 SM45C
2 active listings and RFQs →
BS 970 (Part 1) 040A12
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Frequently Asked Questions
What is the difference between KS D3752 SM45C and BS 970 (Part 1) 040A12?
KS D3752 SM45C specifies Si, P, S which are not specified for BS 970 (Part 1) 040A12.
Can KS D3752 SM45C be substituted with BS 970 (Part 1) 040A12?
KS D3752 SM45C and BS 970 (Part 1) 040A12 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.