These steels feature guaranteed fine grain structure and low carbon equivalent. Mechanical properties of these plates are guaranteed at high temperatures (up to 400 °C) – yield strength R_p0,2 as well as at low temperatures (down to -50 °C) – impact energy KV; therefore, they can be used for constructions of more demanding pressure vessels working under high as well as low temperatures.

Designation	Min. Yield Strength ReH 1) [MPa]	Min. Yield Strength RpO,2 2) [MPa]	Tensile Strength Rm [MPa]	Min. Elongation [%]	Min. Impact Energy KV 3) [°C/J] - transverse	CEV max. 4)	Dim. Table No.
P275NH	275	179	390-510	24	-20/30	0.40	table 1
P275NL1	275	179	390-510	24	-40/27	0.40	table 1
P275NL2	275	179	390-510	24	-50/27	0.40	table 1
P355N	355	-	490-630	22	-20/30	0.43	table 1
P355NH	355	232	490-630	22	-20/30	0.43	table 1
P355NL1	355	232	490-630	22	-40/70	0.43	table 1
P355NL2	355	232	490-630	22	-50/27	0.43	table 1
P460NH	460	300	570-720	17	-20/30	0.53	table 2
P460NL1	460	300	570-720	17	-40/27	0.53	table 2
P460NL2	460	300	570-720	17	-50/27	0.53	table 2

1) Valid for thickness up to 16 mm, for higher thickness refer to the standard
2) By agreement with the order; valid for temperature 300 °C and thickness up to 16 mm, for other temperatures and/or higher thickness refer to the standard
3) For other temperatures refer to the standard
4) On agreement; CEV=; valid for thickness up to 60 mm, for thicker plates refer to the standard

EQUIVALENT DESIGNATION