We receive the raw materials as a hot-rolled 4142 steel bar with various size (length about 25' to 30', and diameter about 0.625", 0.75", 1.0", 1.125", 1.25". We do forging and then heat treatment on the rods in house. The mechanical properties requirements are 85k psi for minimum yield, 110k psi min tensile and 140k psi for max tensile.