Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
EN 10083-2 C40 (EN 10083-2:2006) and BS 970 (Part 3) 045A10 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Carbon Steel category.
EN 10083-2 C40 is typically used for shafts, gears, bolts, machine parts, agricultural equipment, while BS 970 (Part 3) 045A10 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; case hardening steel, carbon and carbon manganese (table 14).
EN 10083-2 C40 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 3) 045A10 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, EN 10083-2 C40 vs BS 970 (Part 3) 045A10 is a 65.6% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a minimal match overall at 35%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
EN 10083-2 C40
BS 970 (Part 3) 045A10
Condition
Quenched and tempered (+QT), ruling section d <= 16 mm
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; case hardening steel, carbon and carbon manganese (Table 14)
Key Differences
EN 10083-2 C40 specifies Cr, Cr+Mo+Ni, Mo, Ni which are not specified for BS 970 (Part 3) 045A10.
Can EN 10083-2 C40 Be Substituted With BS 970 (Part 3) 045A10?
EN 10083-2 C40 and BS 970 (Part 3) 045A10 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.
What is the difference between EN 10083-2 C40 and BS 970 (Part 3) 045A10?
EN 10083-2 C40 specifies Cr, Cr+Mo+Ni, Mo, Ni which are not specified for BS 970 (Part 3) 045A10.
Can EN 10083-2 C40 be substituted with BS 970 (Part 3) 045A10?
EN 10083-2 C40 and BS 970 (Part 3) 045A10 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.