ST52 Hollow Bar by sdsdfqw21

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									 Product Information:
              ST52 Hollow Bar



  ST52 Hollow Bar (Technical Standard)
  (CARBON STEEL)
  Chemical:
  Composition %
  Carbon        = 0,22 max.
  Silicon       = 0,55 max.
  Manganese     = 1,60 max.
  Phosphorus = 0,035 max
  Sulphur       = 0,030 max
  Vanadium      = 0,05 - 0,09
  Chromium      = 0,40 max.

  Dimensional Tolerance:
  Tolerance: OD ± 1%
  Wall Thickness: ± 10%
  The tolerance data above should be determined based on the nominal dimension
  Straightness:
  Max. 3mm over 1000mm for OD <180mm dia.
  Max. 4mm over 1000mm for OD >180 dia.

  Characteristics:
  • Machinability good
  • Required hardness can be achieved by case hardening the outer surface by means
     of one of the following methods:
     i. Carburising, Carbonitriding, Nitriding, Nitrocarburising, Tuftriding

  Typical Applications:
  Hydraulic cylinders/Honed cylinders
  Spacers
  Bushes (not subject to severe wear)
  Case hardened rollers (light duty)
  Rolls for coal cutting equipment
  Rings (industrial)

Mechanical Properties
    Yield             Tensile                                Charpy (V)      Hardness       Tensile
                                        Elongation
  Strength           Strength                               Impact Test       Brinell    Tons/sq. inch

 RP 0.2 MPA          RM (MPA)               A (%)           Joules (-20°C)     BHN

    >330                <700                 >21                 >27         149 - 192      32 - 42
 NOTE: For wall thickness <8mm the impact test value will not be supplied




           Tel: +27 (0)11 865 4939. Fax: +27 (0)11 902 8995. e-mail: sales@specialsteels.co.za

								
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