Electrodes for Low Temperature Service

Nitherme-3.5(Spl) is a low hydrogen iron powder electrode depositing 3.5%Ni weld metal. It is pleasing operating characteristics and weld metal is of radiographic quality. Weld metal possesses excellent toughness at sub-zero temperatures. Ideal for welding fine grained Nickel steels for service temperatures down to minus 73°C.

Typical applications include pressure vessels, piping, valves and tanks used for storage, transportation and distribution of liquefied gases.

(For best impact strength)

1. Accomplish minimum heat input during welding by,

a. Controlling preheat and interpass temperature.

b. Using smallest size of electrode possible.

c. Minimum weaving.

d. Welding in down hand position wherever possible.

2. Deposit maximum number of layers, which enables grain refinement.

3. Ensure the electrodes are dry. Re-dry the electrodes at 300°C for 2 hours.