Phoenix SH Schwarz 3 K NI description: Basic covered NiMo alloyed electrode with a weld metal of special metallurgical purity for nuclear reactor construction. Quality controlled according to KTA 1408.2; very low H2-content ≤ 5 ml/100 g; NDT-tested. Used preferably for the welding of steels in the construction of nuclear reactors, boiler and pressure vessels; for fine grained structural steels up to S500Q. Redry for 2 h at 300 - 350 °C (572 - 662 °F).