SAE52100,EN31M,EN31
EN18, EN24, EN19C, EN19, EN18D, EN18C, EN18A, 27C15, 20MnCr5, 20Mn2, 16MnCr5, FILESTEEL,EN18B,
SAE862, SAE8622, EN353, EN354, 15CrEN24, 17Cr3, 40Cr4, 34Cr4 etc