Strong Match — 88.8% match
based on chemical composition and mechanical property overlap.
EN 10083-3 42CrMo4 (EN 10083-3:2006) and BS 970 (Part 3) 708M40 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Alloy Steel category.
EN 10083-3 42CrMo4 is typically used for high strength bolts, crankshafts, axles, while BS 970 (Part 3) 708M40 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (table 16).
EN 10083-3 42CrMo4 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 3) 708M40 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, EN 10083-3 42CrMo4 vs BS 970 (Part 3) 708M40 is a 88.8% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a strong match overall at 88.8%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
EN 10083-3 42CrMo4
BS 970 (Part 3) 708M40
Condition
Quenched and tempered (+QT), ruling section d <= 16 mm
Not specified
Elongation
10% min
Not specified
Hardness
Soft annealed (+A): 241 HBW max
Not specified
Tensile Strength
1100 to 1300 MPa
Not specified
Yield Strength
900 MPa min
Not specified
Typical Applications
EN 10083-3 42CrMo4
High strength bolts, crankshafts, axles
BS 970 (Part 3) 708M40
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (Table 16)
Can EN 10083-3 42CrMo4 Be Substituted With BS 970 (Part 3) 708M40?
EN 10083-3 42CrMo4 and BS 970 (Part 3) 708M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 708M40 is often considered as a substitute for EN 10083-3 42CrMo4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between EN 10083-3 42CrMo4 and BS 970 (Part 3) 708M40?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10083-3 42CrMo4 be substituted with BS 970 (Part 3) 708M40?
EN 10083-3 42CrMo4 and BS 970 (Part 3) 708M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 708M40 is often considered as a substitute for EN 10083-3 42CrMo4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.