Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Mn
S
P
<=0.20
<=0.80
<=0.060
<=0.060
Mechanical Properties
Tensile Strength
≥309 MPa (20 tons/sq in, converted)
Elongation
≥28%
Condition
, ruling section 6 in (lowest-strength condition of the standard)
Typical Available Sizes
Round Bar
10mm–150mm dia
Flat Bar
16×5mm–100×25mm
Sizes are indicative. Contact seller for exact availability.
More data from BS 970:1955
From the standard
Condition of material on delivery
Note
As rolled or forged unless the order states otherwise
Source: BS 970:1955, Part 2, En 2 (page 37)
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
6
20
-
28
-
-
-
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 2 (page 37)
Other tests and requirements
Bend test (180 deg)
r = 3/4 t
Source: BS 970:1955, Part 2, En 2
Notes
Note
When required in the form of plate, sheet and strip the steel should be ordered to B.S. 1449, Steel plate, sheet and strip, when the limits for manganese, sulphur and phosphorus do not apply. Bend test applicable only to bars rolled or forged to a minor sectional dimension not greater than 1/2 in.
Source: BS 970:1955, Part 2, En 2
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.