Powder metallurgy (PM) includes a strong diversity of industrial processes such as press and sintering, near-net shape and additive manufacturing to produce metallic parts. Due to limited losses, these processes are known as promising environmental solutions compared to conventional manufacturing processes such as machining, forging or casting. By offering more integrated, flexible and adapted processes, PM promises an optimization of raw material resources along its value chain while improving energy efficiency on the manufactured parts life cycles. Our work done in the framework of H2020 SUPREME project, uses Life Cycle Assessment methodology and eco-design approaches to evaluate the environmental performances of different steps of the PM value chain, compared to traditional manufacturing value chain. The application fields analyzed are automotive, medical, cutting tools, molding tools and aeronautics. With our methodology, we are aiming at identifying environmental challenges and opportunities for PM, from mining operation and powder production to part manufacturing.