Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
EN 10083-1 C35E (EN 10083-1:1996) and BS 970 (Part 1) 040A04 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Carbon Steel category.
EN 10083-1 C35E is typically used for quenched and tempered machine parts; also used normalized (clause 1.1, table 10), while BS 970 (Part 1) 040A04 is commonly used for as-rolled, or as-rolled and softened, steel (section two).
EN 10083-1 C35E is defined under European Standard (EN), originating from Europe, while BS 970 (Part 1) 040A04 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, EN 10083-1 C35E vs BS 970 (Part 1) 040A04 is a 59.7% 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 C35E
BS 970 (Part 1) 040A04
Condition
Quenched and tempered, ruling section d <= 16 mm
Not specified
Elongation
17% min
Not specified
Tensile Strength
630 to 780 MPa
Not specified
Yield Strength
430 MPa min
Not specified
Typical Applications
EN 10083-1 C35E
Quenched and tempered machine parts; also used normalized (clause 1.1, Table 10)
BS 970 (Part 1) 040A04
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
EN 10083-1 C35E specifies Cr, Cr+Mo+Ni, Mo, Ni which are not specified for BS 970 (Part 1) 040A04.
Can EN 10083-1 C35E Be Substituted With BS 970 (Part 1) 040A04?
EN 10083-1 C35E and BS 970 (Part 1) 040A04 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 C35E and BS 970 (Part 1) 040A04?
EN 10083-1 C35E specifies Cr, Cr+Mo+Ni, Mo, Ni which are not specified for BS 970 (Part 1) 040A04.
Can EN 10083-1 C35E be substituted with BS 970 (Part 1) 040A04?
EN 10083-1 C35E and BS 970 (Part 1) 040A04 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.