Product Description standard GB/T3639, GB8162,GB8163, DIN2391 ASTM A519,A106 ,A179 A53,, EN10305-1,EN10305-4,DIN17175 Material 1010 1020 1045 S45C S20C S10C 12crmo 40CR ASTM106GrB ASTM179 ST37 ST52 ST38.5 CK45 etc. Application area Precision steel pipes are widely used in automobiles, motorcycles, electric vehicles, petrochemical, electric power, ships, aerospace, bearings, pneumatic components, seamless steel pipes for medium and low pressure boilers, etc. They can also be applied to steel sleeves, bearings, hyd…