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DIN 17222 C75 vs BS 970 (Part 1) 040A12

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

DIN 17222 C75 (DIN 17222:1979-08) and BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. DIN 17222 C75 is typically used for springs, chisels, punches, cutting tools, hand tools, while BS 970 (Part 1) 040A12 is commonly used for as-rolled, or as-rolled and softened, steel (section two). DIN 17222 C75 is defined under Deutsches Institut fur Normung (DIN), originating from Germany, while BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, DIN 17222 C75 vs BS 970 (Part 1) 040A12 is a 80% 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 DIN 17222 C75:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 080A20 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
80%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property DIN 17222 C75 BS 970 (Part 1) 040A12
Standard DIN 17222:1979-08 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.70–0.80 0.10-0.15
Si (%) 0.15–0.35 Not specified
Mn (%) 0.50–0.80 0.30-0.50
S (%) ≤0.040 Not specified
P (%) ≤0.040 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 DIN 17222 C75 BS 970 (Part 1) 040A12
Tensile Strength 850–1000 MPa (annealed) Not specified
Hardness HRC 58–63 (hardened) Not specified
Hardness HB 229–285 (annealed) Not specified
Typical Applications
DIN 17222 C75
Springs, chisels, punches, cutting tools, hand tools
BS 970 (Part 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can DIN 17222 C75 Be Substituted With BS 970 (Part 1) 040A12?
DIN 17222 C75 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
DIN 17222 C75
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5200–7000 mm (204.72–275.59 in)
BS 970 (Part 1) 040A12
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On M-EX Right Now
DIN 17222 C75
3 active listings and RFQs →
BS 970 (Part 1) 040A12
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Frequently Asked Questions
What is the difference between DIN 17222 C75 and BS 970 (Part 1) 040A12?
DIN 17222 C75 specifies Si, S, P which are not specified for BS 970 (Part 1) 040A12.
Can DIN 17222 C75 be substituted with BS 970 (Part 1) 040A12?
DIN 17222 C75 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.