Specification 1.Chromium molybdenum alloy steel. 2.Slightly higher carton content than 4130. 3.Great strengh and heat treatment. 4.Good processability and easy polishing. 5.Good toughness and small quenching deformation. Chemical composition NAME C Si Mn P S Cr Mo 4140 0.38-0.45 0.17-0.37 0.50-0.80 max0.035 max0.035 0.90-1.20 0.15-0.25 Name Alloy structual steel Features 1. Excellent fatigue resistance 2.Good processability and small deformation when processing 3.Good intensity and nice synthetic mechanical property Application 1.Used in the manufacture of high strength forgings 2. Oil drill pipe joints and fishing tools 2. Oil drill pipe joints and fishing tools Sizes According to your requirments Packing Normal packing or according t customer's requests. Price The price will change according to the weight of the steel you need.