Advantages: Produced for drilling with uniform wall-thickness, wallthickness deviation +/-5%. High dimensional accuracy and nice straightness,straightness 1/1000mm or 0.5/1000mm. Reliable performance (including hardness) andnice torsion-resistant.

Main standards: ASTM A519, DIN.

Main materials: 4130, 4135 and 4140.
O.D. 30to 127mm,

W.T. 5 to13mm

For QTcondition:

Tensilestrength>=1030Mpa,

Yieldstrength: >=950Mpa,

Elongation:>=13%,

HRC 30 to32.

Zhejiang Dingxin Steel Tube ManufacturingCo., Ltd.

ISO9001, TS16949.

Contact person: Lisa Hsu,

sales04[at]dingxintube[dot]cn