... Factory professional service UT+ Peeled +Turned + Heat Treatment Commodity: Steel Forgings RingSteel Grade: SAE 4140,4340,1045,8620,8640,1020,4320 ... steel, alloy steel, high speed steel, carbon structural steel, hot-rolled bar, hot-rolled wire rod, forged steel, cold-drawn bar, hot ... -rolled wire rod, hot-rolled bar, forged bar, cold-drawn bar, high carbon chromium ...