1, high strengh structural steel 2, high hardness and toughness 3, high hardenability 4, good performance in machining Sichuan Liaofu Special Steel Trading Co., Ltd. ... 4~6m, or at the customers' requirements Sichuan Liaofu Special Steel Trading Co., Ltd.Alloy strctural steel1, Grade: GB 30CrMnSi2, ... wheel, axle sleeve, bolt, and nut, etc.; parts of high abrasive resistance and low working temperature.