Chemical Requirements

Element / Component	Composition %
Carbon ( C )	0.18 - 0.23
Manganese ( Mn )	0.80 - 1.35
Phosphorus ( P )	0.035 max
Sulphur ( S )	0.030 max
Silicon ( Si )	0.15 - 0.35
Aluminium ( Al )	-
Chromium ( Cr )	0.30 max
Copper ( Cu)	0.40 max
Nickel ( Ni )	0.40 max
Titanium ( Ti)	-
Vanadium ( V )	0.030 max
Molybdenum ( Mo )	0.12 max
Niobium ( Nb )	0.020 max
Nitrogen ( N )	-

  Mechanical Requirements

Items	Value
Yield Strength ReH N/mm2	250 min
Tensile Strength Rm N/mm2	485 - 630
Elongation ( A )	20% min
Reduction ( Z )	45% min
Impact Test ( J )	31 min