Low & High Carbon Low Alloy (8600, 4100, 4300, QQS, etc.) Medium Alloy (WC-9, C-5, CA-6NM, etc.) High Alloy (corrosion and heat resistant CA-15, CF-8M, CF-3M, etc.) Duplex Metals (CD-4MCU, etc.) Low- Temperature Service Alloys (LC-1,2,3; LCB, etc.)