Properties

Mechanical properties

Cold-rolled steel for forming has the following mechanical properties (skin-passed) - these are measured transverse to the rolling direction:

^1. The values of the yield strength are those of the 0.2% yield strength for products with no definite yield point and the lower yield strength R_eL for the other products.
^2. For thicknesses > 0.5 mm and ≤ 0.7 mm, the value for yield strength is increased by 20 N/mm².
   For thicknesses ≤ 0.5 mm, the value is increased by 40 N/mm².
^3. For thicknesses > 0.5 mm and ≤ 0.7 mm the minimum elongation after fracture is decreased by 2%. For thicknesses ≤ 0.5 mm the minimum elongation after fracture is decreased by 4%.
   Elongation after fracture A uses test piece length L₀ =  80 mm.
^4. The r- and n- values apply to a thickness of t ≥ 0.5 mm.
^5. For a thickness of t > 2 mm, the r₉₀ value or r-average value is decreased by 0.2.
^6. For design purposes, a lower yield strength R_eL of at least 120 N/mm² can be assumed.
 

Chemical composition

Cold-rolled steel for forming supplied by Tata Steel comply to the following cast analysis:

^1. Titanium may be replaced by niobium. Carbon and nitrogen will be completely bound.
All values are in weight%.