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
0.12-0.18
<=0.25
1.00-1.50
0.10-0.18
<=0.060
Mechanical Properties
Tensile Strength
≥432 MPa (28 tons/sq in, converted)
Elongation
≥25%
Condition
Hot rolled or normalised, ruling section 6 in (lowest-strength condition of the standard)
More data from BS 970:1955
From the standard
Condition of material on delivery
Note
Unless otherwise agreed the bars shall be delivered in the cold drawn condition. They may, at the manufacturers option, be re-heated before or after cold working, in the latter case to a temperature not exceeding 620 C.
Source: BS 970:1955, Part 2, En 7A (page 53)
Mechanical properties
Condition
Ruling section or size (in)
Tensile strength (tons/sq in)
Yield stress (tons/sq in)
Elongation (%)
Izod impact (ft lb)
Brinell (HB)
Proof stress 0.2% (tons/sq in), when requested
Hot rolled or normalised
6
28
-
25
-
-
-
Cold drawn, size (diameter or width across flats) 3/4 or less in
-
35-45
-
15
20
-
-
Cold drawn, size (diameter or width across flats) Over 3/4 to 1 1/8 in
-
35-45
-
15
15
-
-
Cold drawn, size (diameter or width across flats) Over 1 1/8 to 2 1/2 in
-
30-40
-
15
10
-
-
Values as printed in BS 970:1955; tensile strength, yield stress and proof stress in tons/sq in, Izod in ft lb. Minimum unless a range is shown.
Source: BS 970:1955, Part 2, En 7A (page 53)
Status in the 1955 edition
Status
Deleted by Amendment 9
Reason
Amendment 9 (Feb 1972): carbon and carbon-manganese steels moved to BS 970 Part 1:1972
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.
Source: BS 970:1955, Amendment slips 6 to 10
Active BS 970:1955 EN7A Listings on M-EX (For Sale)