Material: AISI 4020 Description: Standard Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures Group Name: Ferrous Mild Steel Alloys Sub Group: AISI 4020 Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures Application: Intended for Valve, Pump, General Engineering, Automotive and Other Industries Standard: AISI-USA