… ER409 alloy. Single pass welds on light gage base metal or welds with preheat do not usually require PWHT. … 1.4000, 1.4002, 1.4016, 1.4057, …

…  high  strength, actual strength being dependent on heat treatment  Preheat,  interpass  temperature and PWHT will  be dependent  on …

… resist high impact load, high heat, thermal shock, hot corrosion, compression, abrasion, erosion and many other forms of attack. The weld …

… risk of braking out or chipping of. In case of sensitive base material preheating is recommended at 300-400°C. Old Hardfacing layers should be …

… for welding grey, malleable, nodular and phosphorus cast iron. Preheat is not necessary. Heat input is low which favors limited heat …

… used on the back surface of sheet or plate less than 1/4 in. thick to prevent oxidation. Gas Requirements. Welding-grade argon (99.999 …

… compared to CMn steels and sees the alloy being used for boiler, pressure vessel and piping construction. Typical with FL 155 Flux or FL …

… in thick highly restrained weldments, since the possibility of premature service failure by intergranular HAZ cracking is reduced by …

… as most commercial copper grades. Thicker sections than 5 mm should be preheated up to approximately 500 °C. … Cladding steel, Grey cast iron, …

… of the pure aluminium grades. Heavy parts and thicker plates should be preheated (150°C), prior to welding. At the same time, it keeps the …