Q355NF

At least one of Al, Nb, V and Ti must be present; When added individually or in combination, at least one element must reach its tabulated minimum; all four elements are not required to meet the listed minima. For sections and bars, the P and S maxima may each be increased by 0.005%. Ti may reach a maximum of 0.20%. Total aluminum Alt may replace acid-soluble aluminum Als, with a Alt minimum of 0.020%; Where grain-refining elements such as Nb, V or Ti are added and meet the stated minima, the aluminum minimum does not apply. In the original table, Als refers to acid-soluble aluminum and Alt refers to total aluminum; analysis types cannot be directly compared or mixed.; Using Alt as a substitute, or waiving the aluminum lower limit under the microalloying conditions, requires checking the original note and measured test report.. At least one of Al/Nb/V/Ti must reach the corresponding lower limit.; It is not required for all elements to simultaneously reach the lower limit; elements not reported shall not be treated as 0.. This batch only verifies the composition table and conditions.; The calculated independent-element envelope does not establish compliance with the CEV/Pcm upper limits in Tables 4/6 for the applicable thickness/delivery condition; the actual heat and corresponding table must still be checked.. Retain normalized/normalizing-rolled condition N and thermomechanically rolled condition M separately; a shared steel grade does not make the delivery conditions interchangeable..