BS 4449 / 1997 :

Parameter Specified by BS 4449 :1997

 

...Table 1: Cross sectionals area and mass   ....This is a non-preferred size
Nominal Size Cross Sectional Area mm Mass per Meter Run Kg / m Mass per Foot Run gram / ft Nominal Size mm Tolerance on Mass per Meter Run %
6 28.3 0.222 67.67 6 ± 9
8 50.3 0.395 120.40 8 and 10 ± 6.5
10 78.5 0.616 187.76 12 and over ± 4.5
12 113.1 0.888 270.66  
16 201.1 1.579 481.28
20 314.2 2.466 751.64
25 490.9 3.854 1174.70
32 804.2 3.854 1924.20
40 1256.6 9.864 3006.55
50 1963.5 15.413 4697.88

 

....Table 3: Chemical composition of
....Steel Grades: Cast Analysis
............. ....Table 4: Physical Properties of Steel Grades.
Element Grade 250 % (max.) Grade 460 % (max.) Yield Strength R N/mm Stress Ration R / R (mm) Elongation at Fracture A5 (min.) % Total elongation at maximum force A (min.) %
Carbon 0.25 0.25 250 1.15 22 -
Sulphur 0.060 0.050 460 1.05 12 2.5
Phosphorous 0.060 0.050 460 1.08 15 5
Nitrogen 0.012 0.012 1. For routine testing the yield strength shall be considered a minimum value. For determination of long term quality level, the values given shall be for the characteristic strength.

2. Rm is the tensile strength.

3. The total elongation at maximum force shall be measured and recorded and available for inspection, but values obtained below the minimum values specified shall not be a cause for non-conformity with the British Standard.

4. Ductility classes A and B are designated ductility classes
...N and H respectively in DD ENV 1992/1/1:1992.

NOTE 1:
The maximum value for nitrogen does not apply if the chemical composition shows a minimum aluminum content of 0.20 % or if sufficient other nitrogen binding elements are present.

NOTE 2:
Nitrogen content is not normally given on a release certificate.