Method statement to weld the EN8 Shaft
shaft material is EN8 After Turning the final size we get 40 MM where welding of EN8 shaft with the MS plate has to be weld . Following process should be fallowed to weld the EN8 welding : welding rod selection E7018L or E7018-1 is recommended. Welding rod should be heat to 250 degree centigrade for the 90 Minute to 120 Minute. After that Maintain the temperature of 80 to 90 degree Celsius while welding in the oven. Certified welder WPS & WPQ is highly recommended. Proper Beveling as per the drawing should be done. Don't Bypass the preheating as it is the reduce residual flaws in the welding such as lack of fusion , porosity, pin hole etc. It Minimized the Cracks in the extreme level. While welding if the final Machining is not done support to hold the shaft in the rigid position for reducing the deflection due to thermal stress should be done if possible.
