Alloy Steel 8640 is a special-alloy steel that includes chromium, manganese, and molybdenum. Due to its lower carbon levels, Alloy Steel 8640 takes mechanical and heat treatments better than most alloys. Alloy Steel 8640 is popular in the aerospace, defense, oil and gas, and automotive industries. You will find Alloy Steel 8640 in a number of different applications including:

You will find Alloy Steel 8640 in a number of different applications including:

• Crankshafts
• Screws
• Axles
• Pistons
• Forged hand tools
• Aircraft landing gear and airframes

Alloy Steel 8640 contains the following chemical composition:

• Fe Balance
• Mn 0.75-1.0%
• Ni 0.40-0.70%
• Cr 0.40-0.60%
• C 0.38-0.43%
• Si 0.15-0.30%
• Mo 0.15-0.25%
• S 0.04% max
• P 0.035% max

Continental Steel carries a variety of shapes and sizes of Alloy Steel 8640 including round bars, flat bars, tubes, cold-rolled and hot-rolled sheets, and plates. As with all our products, Continental Steel’s Alloy Steel 8640 meets or exceeds many of the industry’s toughest specifications including those from ASTM, SAE, and UNS.  If you have any questions about Alloy Steel 8640, or any of our other products and services, please contact the experts at Continental Steel today.