Hydraulic / Pneumatic Precision Cylinder Tube ( Homed/Roller Burnished Seamless Tube)  
 
SEAMLESS COLD DRAWN HONDED / ROLLER BURNISHED CYLINDR TUBE ST52
Material Specification And Ref. Document
ST52, BK+S, DIN 2391
Chemical Composition (%)
C (Max) Mn (Max) Si (Max) S (Max) P (Max)
0.22 1.6 0.5 0.035 0.035


   
Mechanical Properties
UTS (Min) Y. S (Min) % EL5.65 √ A(Min)
≥600MPa ≥520 Mpa ≥14
 
   
Supply Condition
Cold Drawn Seamless Steel Tube, Stress Relived and Honed or Skived Roller Burnished
 
Surface Roughness I. D.
Ra+0.2~0.4 Micron

 
Tolerance On Inner Dia
H8
 
Tolerances On Wall Thickness
< Dia 120 +/-5% of wall thickness
> Dia 120 +/-5% of wall thickness
 
Straightness
<.3-1/1000mm/M
 
OD Tolerance
< Dia 40 +/-0.2mm
> Dia 40 > 100 +/-0.3mm
> Dia 100 +/-0.5mm
 
Length And Cut Tolerance
Lenght < 500mm, +2mm
< 500mm <2000mm, +3mm
<2000mm <5000mm, +5mm
<2000mm <7000mm, +10mm
 
Tube Ends
Tube ends shall be cut nominally square to the axis and free form burs
 
Appearance
Tune shall have a smooth internal and external surface consistent wiht cold working process, tube inner surface should be free from rust, scratches and other surface irregularities.
 
Certification
Material certificates as per EN 10204/3.1B
 
Packing
Anti rust oil to be applied on material and both ends closed by plastic cap and bundled by steel strips
 
Scope
Hydraulic Cylinder Tube for Swivel Crane, Injection Machine and Copnsstruction Machine Application.
 
   
 
   
   
  Piston Rod (Chrome Plated Shafts)  
   
CHROME PLATED ROD CK 45
 
Material Specification And Ref. Document
CK 45
 
Chemical Composition (%)
C Mn Si S (Max) P (Max)
0.4-0.5 0.06-0.9 0.15-0.35 0.04 0.04
 
   
Mechanical Properties
UTS (Min) Y. S (Min) % EL5.65 √ A(Min)
520 N/MM2 320 N/MM2 14
 
   
Supply Condition
Hot Rolled, Peeled, Ground, Chrome Plated and Polished
 
Chrome Plating Thickness And Hardnes
Thickness 20-30 Microns, Hardness 850-1150 HV (Vickers 100g.)
 
Surgace Roughness
Ra < 0.2 Micron and Rt < 2 Micron
 
Tolerances On DIA
ISO f7 on the Diameter
 
Ovallity
Half of the Tolerance ISO f7
 
Straightness
ø6 to ø12 Length 800-2000mm
ø16 to ø40 Length 1200-4000mm
 
Fix Length and Cut tolerance
Length up to 1000mm-0/+2mm
Length Over 1000mm-0/+3mm
 
Scope
Hydraulic Cylinder Piston Road for Tractors, Forklift, Crane, Constructin Machine and Machine Tools Application
 
Mearest Equivalent Material
EN-8, BS : 970, 45C8
 
   
 
   
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