5.500 (5-1/2 inch) x 3 inches, 4340 QT Alloy Steel Round Rod, HR
4340 HR Q&T (Quenched and Tempered) is prehardend to 35-40 Rockwell C hardness. 4340 HR Q&T is primarily used for heavily stressed parts that must operate under strenuous conditions. The Quenching increases the hardness of the steel, while the tempering makes it less brittle.
5.500 (5-1/2 inch) x 6 inches, 932 (SAE 660) Bearing Bronze Round Rod
Alloy: 932. C932 bronze, also known as SAE 660 or bearing bronze, is a high-leaded tin bronze alloy with excellent machinability, strength, and wear resistance, making it suitable for a wide range of applications, especially those involving bearings and bushings.