A welder is a tradesperson who specializes in fusing materials together. The materials to be joined can be metals (such as steel, aluminum, brass, stainless steel etc.) or varieties of plastic or polymer. Welders typically need to have good knowledge of materials to be joined together. Welding is a very risky work so the welder has to wear safety clothes and helmets to prevent themselves from being burnt. Welder with expertise in welding welds submarines hulls, industrial boilers, and power plant heat exchangers and boilers. There are various job requirements for welders in various government companies like - Hindustan Copper Limited, National Centre for Antarctic & Ocean Research. Age limit for candidates applying as Welder in the government sector is 30 years and pay scale ranges from Rs 8000 to Rs 15000 per month depending upon the level of responsibility and technicality.