Caution
① Dry the electrodes at 350~400℃(662~752℉) for 60 minutes before use.
② Adopt back step method or strike the arc on a small steel plate prepared for this particular purpose, because arc striking on the base metal is in danger of initiating cracking.
③ Preheat at 80~100℃(176~212℉) before use. The temperature to be applied varies in accordance with plate thickness and steel kind.
Purpose
① Low temperature strength steel (1% Ni) • Offshore structure
Attribute
① Good impact value at -40°C
② Iron powder and low hydrogen type electrode (high efficiency
Caution
① Dry the electrodes at 350~400 ℃(662~752℉) for 60 minutes before use.
② Adopt back step method or strike the arc on a small steel plate prepared for this particular purpose because arc striking on the base metal is prone to initiating cracking.
③ Keep the arc as short as possible.
④ Preheat at 80~100℃(176~212℉). The temperature varies in accordance with the plate thickness and possible.
⑤ If each welded pass becomes thicker than acceptable level by high amperage or low speed ratio manipulation, the impact values and yield points will decrease."
Purpose
① Low temperature strength steel (2.5% Ni)