N, camshaft, suspension, chassis, other cars parts.
Zhejiang dingxin steel tube manufacturing co., ltd.
Steel strips bundled, cover with plastic fabric, woven bag packed. Or wooden boxes packed
Advantages: precision inside diameter. Nice mechanical property are able to withstand high pressure impacting. Nice straightness, minimum surface roughness and small wall thickness deviation.
Standards: din 2391, en 10305-1, astm a519.
Materials: 1020, 1026, 1045, st45, st52, e255 and e355.
Delivery condition: cold finish (bk).
Inner roughness: <=0.8%ra.
Bundled or wooden boxes packed
Advantage: high precision, nice straightness and small allowance for honing. Minimum surface roughness. Inner roughness: 0.8
Main standards: din2391, en10305-1, astm a 519.
Main materials: st45, st52, 1020, 1026, e255, e355
Usage: for honing pipe, hydraulic cylinder, pneumatic cylinder
Delivery condition: stress relieved (bks)
Straightness: 0.3-1/1000mm
Tensile strength: >=610mpa
Steel strips bundled, cover with plastic fabric, woven bag packed, or wooden boxes packed
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, 4140, 30crmo, 35crmo, 42crmo, 34crmo4.
O.D. 30 to 127mm,
W.T. 5 to 13mm
For qt condition:
Tensile strength>=1030mpa,
Steel strips bundled, cover with plastic fabric, woven bag packed
Advantages: thin-walled, high precision, small ovality, small allowance for processing.
Main standard: din2391, astm a519, en10305-1
Main materials: st45, 1020, e235, e255 (bao steel).
Delivery condition: bk.
Outer diameter: 50 to 116mm,
Wall thickness: 2 to 3mm,
Usage: automotive parts, engine cylinder sleeves, liners.
Bundled or wooden boxes packed
