Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
EN 10083-1 C25R (EN 10083-1:1996) and BS 970 (Part 1) 045A10 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Carbon Steel category.
EN 10083-1 C25R is typically used for quenched and tempered machine parts; also used normalized (clause 1.1, table 10), while BS 970 (Part 1) 045A10 is commonly used for case hardening steel (section four).
EN 10083-1 C25R is defined under European Standard (EN), originating from Europe, while BS 970 (Part 1) 045A10 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, EN 10083-1 C25R vs BS 970 (Part 1) 045A10 is a 61.7% match.
As per mechanical properties, the match is 0%.
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 C25R
BS 970 (Part 1) 045A10
Condition
Quenched and tempered, ruling section d <= 16 mm
Case hardened, 19 mm test bar
Elongation
19% min
18 % min
Tensile Strength
550 to 700 MPa
430 MPa min
Yield Strength
370 MPa min
Not specified
Typical Applications
EN 10083-1 C25R
Quenched and tempered machine parts; also used normalized (clause 1.1, Table 10)
BS 970 (Part 1) 045A10
Case hardening steel (section four)
Key Differences
EN 10083-1 C25R specifies Cr, Cr+Mo+Ni, Mo, Ni which are not specified for BS 970 (Part 1) 045A10.
Can EN 10083-1 C25R Be Substituted With BS 970 (Part 1) 045A10?
EN 10083-1 C25R and BS 970 (Part 1) 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 C25R and BS 970 (Part 1) 045A10?
EN 10083-1 C25R specifies Cr, Cr+Mo+Ni, Mo, Ni which are not specified for BS 970 (Part 1) 045A10.
Can EN 10083-1 C25R be substituted with BS 970 (Part 1) 045A10?
EN 10083-1 C25R and BS 970 (Part 1) 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.