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
Ni
Cr
S
P
0.33-0.38
0.10-0.35
0.60-0.90
1.00-1.50
0.45-0.75
<=0.050
<=0.050
More data from BS 970:1955
From the standard
Notes
Note
Special applications; composition only. Mechanical properties not part of contractual obligations.
Source: BS 970:1955, Part 2, En 111A
Status in the 1955 edition
Status
Deleted by Amendment 7
Reason
Amendment 7 (Sep 1970): direct hardening alloy steels moved to BS 970 Part 2:1970
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.
Source: BS 970:1955, Amendment slips 6 to 10
Active BS 970:1955 EN111A Listings on M-EX (For Sale)