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Hydraulic Cylinder Barrel Blank Seamless Steel Tube, Pre‑Honing Tube
Hydraulic cylinder barrel blank seamless steel tube is raw material for manufacturing hydraulic and pneumatic cylinder barrels. **It is NOT finished honed cylinder tube**. Machining allowance is reserved for inner bore, further boring and honing processes are required to get final cylinder barrel.
Small-diameter seamless steel pipe
Process: Cold drawing and cold rolling, bright annealing
Surface: Bright outer wall without oxide skin
Ra：≤1.6‑3.2μm
Material: Common 20 #, 45 # Q355B
Specification: Outer diameter 4-60mm, wall thickness 0.8-12mm customizable
Thin-wall steel tube
Process: Cold drawing and cold rolling, bright annealing
Surface: The outer wall is shiny without peeling
Ra：≤1.6‑3.2μm
Material: Common 20 #, 45 # Q355B
Specification: Outer diameter 8-114mm, wall thickness 0.5-6mm customizable
Alloy tube
Process: Cold rolling and hot rolling+quenching and tempering annealing
Surface: Smooth and rust free oxide skin
Ra：≤3.2‑6.3μm
Material: Common 16Mn, 40Cr, 12Cr1MoV
Specification: Outer diameter 10-426mm, wall thickness 1.5-70mm customizable
Precision steel pipes for mechanical parts
Process: Cold drawing and cold rolling, bright annealing
Surface: Smooth and burr free oxide skin
Ra：≤0.8‑3.2μm
Material: Common 20 #, 45 #, 40Cr, Q355B
Specification: Outer diameter 6-180mm, wall thickness 1-18mm customizable
Bearing steel tube
Process: Cold drawn and cold-rolled, spheroidized annealing
Surface: Fine and smooth without scratches or burrs
Ra：≤0.8‑1.6μm
Material: Common GCr15, GCr9
Specification: Outer diameter 10-180mm, wall thickness 1-20mm customizable
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