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

Main standards: ASTM A519, DIN.

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

W.T. 5 to 13mm

For QT condition:

Tensile strength>=1030Mpa,

Yield strength: >=950Mpa,

Elongation: >=13%,

HRC 30 to 32.

Zhejiang Dingxin Steel Tube Manufacturing Co., Ltd.

ISO9001, TS16949.

Contact person: Lisa Hsu,

sales04[at]dingxintube[dot]cn

Mobile:+86-15669301195

Skype: lisa204299