Monel is a particularly resistant to high temperature. It is composed primarily of nickel, copper, with iron copper manganese and silicon included in various %. Monel is highly resistant to corrosion and stronger than pure nickel. Its resistance to hydrofluoric acid, sea water, alkalies and sulfuric acid makes it ideal for marine and chemical environments. Monel is easier to machine and weld than Inconel and hastelloy. It is generally recommended to use a cold-drawn, stress- relieved filler material to achieve recommended to use a cold-drawn, stress-relieved filler material to achieve the best machinability and smoothest finish, including GTAW, GMAW, and SMAW.