Advantages: Nice surface and precision. Nice mechanical property. No deformation after cold bending, no crack after flaring and flattening. Main Standards: GB/T3639, ASTM A519, DIN2391, EN10305-1, JIS. Materials: 10, 20, 45#(1045), S45C, Q345B (ST52), 25Mn (1026), 4130, 4140. Outer diameter: 10 to 370 mm. Wall thickness: 1 to 32 mm. Delivery conditions: cold finished, annealed (bright), quenched and tempered. Application: Used for engine liner, cylinder sleeve, piston, underpin, camshaft, suspension, chassis, other cars parts. Zhejiang Dingxin Steel Tube Manufacturing Co., Ltd. ISO9001, TS16949. Contact person: Lisa Hsu, sales04[at]dingxintube[dot]cn Mobile:+86-15669301195
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