The CW6MC alloy is a nickel-based alloy used to withstand acidic environments, especially in the oil and gas industry where it is used in the production of valves, impellers, and pipes. This alloy is the foundry counterpart of the best known A625 for plastic deformation. Regarding nickel-based alloys, a scrap market like that in the case of steel has not yet been established, therefore, especially in the case of foundries, scrap generally comes from internal recycling (casting waste, feeders, sprues, runners, etc.) to be certain of the origin and quality of the material. In this work, four castings with different percentage of recycled content (0%, 30%, 70%, 100%) were produced in accordance with the technical specifications and analysed to evaluate the effect of scrap on the final chemical composition, the microstructure, the mechanical properties and corrosion resistance. Following the analyses carried out, it was determined that the amount of acceptable scrap content (of those analysed) without compromising the material properties corresponds to 30%.

CW6MC合金是一种镍基合金，用于承受酸性环境，特别是在石油和天然气工业中，用于阀门，叶轮和管道的生产。该合金是塑性变形最著名的A625的铸造代用品。对于镍基合金，尚未建立像钢铁一样的废料市场，因此，特别是对于铸造厂，废料通常来自内部回收（铸造废料，冒口，浇口，流道等）。确定材料的来源和质量。在这项工作中，根据技术规格生产了四个具有不同百分比回收含量（0％，30％，70％，100％）的铸件，并进行了分析，以评估废料对最终化学成分，微观结构，机械性能和耐腐蚀性。在进行了分析之后，确定在不影响材料性能的前提下（分析的）可接受的废料含量为30％。