AMS 5391 은 Nickel 합금입니다. AMS 5391 은, 진공주조 (vacuum cast) 생산방법의 규정입니다. AMS 5391 : Nickel alloy, Corrosion and Heat Resistant, Investment Castings, 73Ni-13Cr-4.5Mo-2.3Cb-0.75Ti-6.0Al-0.010Zr Vacuum Cast, As Cast 규정입니다