Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Si
Mn
S
P
0.50-0.60
1.50-2.00
0.70-1.00
<=0.050
<=0.050
Typical Available Sizes
Round Bar
10mm–75mm dia
Flat Bar
20×5mm–100×20mm
Spring Flat
3×20mm–16×100mm
Sizes are indicative. Contact seller for exact availability.
More data from BS 970:1955
From the standard
Status in the 1955 edition
Status
Deleted by Amendment 10
Reason
Amendment 10 (Jun 1972): spring steels moved to BS 970 Part 5:1972
BS 970:1955 was amended up to Amendment 10 (June 1972); steels were moved to the revised Parts 1 to 5 and deleted from this edition.