Anbao Hydraulic

 Based on the SAE (Society of Automotive Engineers), steels that have a naming structure of 41XX are informally known as chromoly steel, or it is a chromium-molybdenum steel. These steels are usually much harder and tougher than normal carbon steel. Alloying elements allow the steel to be heat treated to obtain stronger physical properties. The last two digits are how much carbon is in the steel. In the case of 4140 , there is .40% carbon and 4150 has a .50% carbon content. These are both extra strong and hard alloys of steel, and are used in applications requiring higher performance than carbon steels can typically withstand. DIFFERENCES Tensile strength: 4150 has a higher tensile strength, meaning it has a higher threshold for stress before breaking. Ductility & workability: 4140 is more ductile, meaning it can be bent easier than 4150. It also can be used in cold working conditions while 4150 needs to be thermally treated before forming. WHEN TO USE These types of steel are

  34CrMo4 seamless steel tube  has high durable strength and creep strength at high temperature, good impact toughness at low temperature, good hardenability, no tendency to overheat, small quenching deformation, plasticity is fair when cold side shape, medium machinability.  Poor weldability, pre-heating before welding, post-welding heat treatment and stress elimination, generally used after quenching and tempering treatment, can also be used after high and medium frequency surface quenching or quenching and low and medium temperature tempering.   Applicable Standards of 34CrMo4 seamless steel tube --- EN 10083-1 steel for quenching and tempering generaltchnical delivery conditions --- ASTM A370 standard test methods and definitions for mechanical testing of steel products --- JIS G3429 seamless steel tubes as  high pressure gas cylinder tubes . --- ASTM E112 standard test methods for determining average grain size --- ASTM E45 standard test methods for determining the inclusi