The pressure pipeline applications demand high strength steels and stainless steels based on the requirement of strength and corrosion point of view, respectively. Welding is one of the widely practiced metal joining techniques in such kind of applications due to the high-pressure environment. The present work is primarily aimed at understanding the feasibility and producing X-ray radiography quality gas tungsten arc welds of dissimilar steels, particularly, 15CDV6 steel and AISI 304 stainless steel. The sound dissimilar GTA welds are subjected to evaluation of microstructures, mechanical properties such as microhardness across the weldment and tensile properties. The mechanical properties are further correlated to microstructures of dissimilar weld joints. The filler wire material has profound influence on the microstructures and mechanical properties (both tensile strength and hardness) of dissimilar steel weld joints. The dissimilar weld made with 8CD12 filler wire demonstrated higher tensile strength and joint efficiency as compared to the dissimilar weld made with ER 308L filler wire.

压力管道的应用分别基于强度和腐蚀的角度要求高强度钢和不锈钢。由于高压环境，焊接是在这种应用中广泛实践的金属连接技术之一。目前的工作主要是为了了解可行性，并生产异种钢（尤其是15CDV6钢和AISI 304不锈钢）的X射线照相质量的钨极氩弧焊。声音不同的GTA焊缝需要进行显微组织，机械性能（如焊缝的显微硬度）和拉伸性能的评估。机械性能进一步与异种焊接接头的微观结构相关。填充焊丝材料对异种钢焊接接头的组织和力学性能（抗拉强度和硬度）都有深远的影响。与使用ER 308L填充焊丝制成的异种焊缝相比，使用8CD12填充焊丝制成的异种焊缝具有更高的拉伸强度和接头效率。