It depends on the application of the product. Different welding processes are suitable for different applications. It also depends on your skill, and the nature of your work as each welding method has pros and cons of its own.
Due to the intense heat it generates and the delayed cooling rate that follows, TIG welding is frequently regarded as the strongest weld.
You can buy a welding machine online from Fatafat sewa.
Generally welding machine costs around the price range of Rs. 10,000 to Rs. 20,000.