Weldcote NI-99 electrodes are designed for welding gray iron castings to themselves and joining them to mild steels or stainless steels. • It is also used extensively to repair castings. • The welds are quite machinable. • A preheat and interpass temperature of not less then 350°F (175°C) is recommended during welding . • Nickel 99 is a nominally 99% nickel electrode. Nickel 99 deposit welds are machinable, which is an important criterion when the casting is to be machined after welding. • Repairs with Nickel 99 are often single-pass welding with high admixture. Even with high admixture, the weld deposit will remain machinable. Nickel 99 works best on castings with low or medium phosphorus contents such as thin plates, machinery parts, frames and housings. Package of (1 Lb.)