Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Mn
0.18-0.23
0.70-0.90
More data from BS 970 (Part 1):1991
From the standard
Other composition limits
Condition of supply
As-rolled
Category
Category 1 steel
Category 1 steels are preferred for new designs and established designs (clauses 1.4 and 2.1). Category 2 steels are printed in italic type.