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
<=0.15
0.10-0.35
<=0.50
<=0.050
<=0.050
Mechanical Properties
Tensile Strength
≥309 MPa (20 tons/sq in, converted)
Elongation
≥28%
Hardness
≤120 HB
Condition
, 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
As rolled or forged unless the order states otherwise
Source: BS 970:1955, Part 2, En 2E (page 39)
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
-
<=120
-
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 2E (page 39)
Other tests and requirements
Hardening Test
When specified on the order, a test piece not exceeding 1/2 in. ruling section shall be oil quenched from 1000 C. The Brinell hardness number of the quenched test piece shall not exceed 160.
Source: BS 970:1955, Part 2, En 2E
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 EN2E Listings on M-EX (For Sale)