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Seamless Tube for Hydraulic Cylinder

Changzhou Chengxin Metal Products Co., Ltd.
Changzhou Chengxin Metal Products Co., Ltd.
City: Changzhou
Province/State: Jiangsu
Country/Region: China
Tel: 86-519-88771678

Seamless Tube for Hydraulic Cylinder

Packaging Details : as Per Customer′s Requirement
Payment Terms : L/C, T/T
Place of Origin : China
Diameter : 80mm-480mm
Material : Carbon Steel and Alloy Steel
Trade Terms : FOB
Production Capacity : 18000m. Tons/Year
Model Number : honed tube,skived&roller burnished tube
Brand Name : Chengxin
Standard : DIN2391, EN10305-1
Min. order : 3 Tons
Main Markets : Global
Morphology : Hydraulic Cyliner
HS Code : 7304319000
Cross-Section Shape : Round
Type : Cold-Drawn
Connection Type : Seamless
Category : Primary & Dry Batteries
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1. Commodity: Seamless tube for hydraulic cylinder
2. Size range: 50mm-*40mm-480mm*420mm
3. Length max: 13.2m
4. Standard&material: EN10305-1 E355, DIN2391 ST52, ASTM A519 SAE1020, SAE1026, SAE1045, SAE4130, SAE4140, etc.
5. Manufacture process: Cold-drawn, cold rolled
6. Treatment method of internal surface: Honed, skived&roller burnished
7. Delivery condition: BK, BKW, BKS, GBK, NBK.
8. Tolerance of ID: H7, H8, H9, H10
9. Tolerance of W. T: +/-5%
10. Roughness of internal surface: 0.125um-0.4um
11. Straightness of tube: 0.5mm/1000mm max.
12. External surface polishing can be provided.
13. Mechanical stamping on each piece of tube can be provided.
14. Standard export packing: Bundle palcing by steel strips, internal&external surface oil coating, and end plastic caps.
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Material Chemical  composition  requirement 
C  (%)Si  (%)Mn  (%)P  (%)S  (%)
10#0.07-0.140.17-0.370.35-0.650.030  max0.025  max
20#0.17-0.240.17-0.370.4-0.70.030  max0.025  max
35#0.32-0.390.17-0.370.5-0.80.030  max0.025  max
45#0.42-0.500.17-0.370.5-0.80.030  max0.025  max

MaterialMechanical  properties
 BK  (cold-drawn/hard)BKW(cold-drawn/soft)
 Tensile  strength
Mpa    min
%    min
Tensile  strength
Mpa    min
%    min
1.   Heat-treating  of  tubes  like  annealing, normalizing, stress-relieving  can  be  negotiated  for  supply.
2.   Tubes  with  other  materials  like  ST52.4  can  be  negotiated  for  supply.

Allowed  depth  of  internal  imperfection     
 Scratch, indents
OD  ≤   63mm  20um    max
63mm< OD≤ 112mm40um  max
OD> 112mm50um  max

DesignationAllowed  roughness  of  internal  surface 
Nominated  value0.125um0.2um0.4um0.8um1.6um3.2um
1.   Tolerance  can  be  +25%/-0
2.   Roughness  of  internal  surface  of  cold-drawn  seamless  tubes  should  reach  " f" ,   3.2um-4um

I. D 
Size  tolerance  and  its  designation
3< I. D≤ 6+18um/-0+30um/-0+48um/-0
6< I. D≤ 10+22um/-0+36um/-0+58um/-0
10< I. D≤ 18+27um/-0+43um/-0+70um/-0
18< I. D≤ 30+33um/-0+52um/-0+84um/-0
30< I. D≤ 50+39um/-0+62um/-0+100um/-0
50< I. D≤ 80+46um/-0+74um/-0+120um/-0
80< I. D≤ 120+54um/-0+87um/-0+140um/-0
120< I. D≤ 180+63um/-0+100um/-0+160um/-0
180< I. D≤ 250+72um/-0+115um/-0+185um/-0

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