Properties

Mechanical Properties

Steel for gas cylinders has the following mechanical properties, measured transverse to the rolling direction:

EN 10120: 2008 Grade P245NB
Min. yield strength1 ReH (N/mm²)   245
Tensile strength Rm (N/mm²)   360 - 450
Elongation %
t < 3 26
≥ 3 34
1. Upper yield strength or 0.2% proof stress applies.
Elongation after fracture A uses test piece length L0 = 80 mm for t < 3 and L0 = 5.65√S0 for t ≥ 3.
t – material thickness in mm.
 

Chemical composition

Tata Steel will satisfy the following cast analysis with values:

EN 10120: 2008 Grade P245NB
C Max. 0.16
Mn Min. 0.30
P Max. 0.025
S Max. 0.015
Si Max. 0.25
Altot Min. 0.020
N Max. 0.009
Nb Max. 0.050
Ti Max. 0.030
All values are in weight%.
Tata Steel does not use Cr, Cu, Mo or Ni as alloying elements for these steel grades.