Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
EN 10083-1 3C45 (EN 10083-1:1991) and BS 970 (Part 3) 045A10 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Carbon Steel category.
EN 10083-1 3C45 is typically used for quenched and tempered machine parts; non alloy steels also normalized (clause 1), 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 10083-1 3C45 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 10083-1 3C45 vs BS 970 (Part 3) 045A10 is a 63.6% 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 10083-1 3C45
BS 970 (Part 3) 045A10
Condition
Quenched and tempered, ruling section d <= 16 mm
Not specified
Elongation
14% min
Not specified
Hardness
Soft annealed: 207 HB max
Not specified
Tensile Strength
700 to 850 MPa
Not specified
Yield Strength
490 MPa min
Not specified
Typical Applications
EN 10083-1 3C45
Quenched and tempered machine parts; non alloy steels also normalized (clause 1)
BS 970 (Part 3) 045A10
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 10083-1 3C45 specifies Cr, Cr+Mo+Ni, Mo, Ni which are not specified for BS 970 (Part 3) 045A10.
Can EN 10083-1 3C45 Be Substituted With BS 970 (Part 3) 045A10?
EN 10083-1 3C45 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 10083-1 3C45 and BS 970 (Part 3) 045A10?
EN 10083-1 3C45 specifies Cr, Cr+Mo+Ni, Mo, Ni which are not specified for BS 970 (Part 3) 045A10.
Can EN 10083-1 3C45 be substituted with BS 970 (Part 3) 045A10?
EN 10083-1 3C45 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.