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
<=0.12
<=1.00
<=1.00
<=0.50
20.0-22.0
<=0.045
<=0.045
More data from BS 970:1955
From the standard
Condition of material on delivery
A
Bars and billets for forging as rolled or forged unless order states otherwise.
B
Forgings and drop-forgings finally heat treated unless order states otherwise.
C
Bars for machining finally heat treated unless order states otherwise.
D
Bright bars finally heat treated, before or after cold work at manufacturer option, unless order states otherwise.
Source: BS 970:1955, Part 2, En 61 (page 175)
Heat treatment
Soften
cooling freely in air from 700/780 C
Temperatures in degrees C as printed.
Source: BS 970:1955, Part 2, En 61 (page 175)
Notes
Note
When required as plate, sheet and strip order to BS 1449.
Source: BS 970:1955, Part 2, En 61
Status in the 1955 edition
Status
Deleted by Amendment 6
Reason
Amendment 6 (Feb 1970): stainless, heat resisting and valve steels moved to BS 970 Part 4:1970
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 EN61 Listings on M-EX (For Sale)