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 Raw Material

 Normal composition of casting as per A-159 (G-1800 to G-4000) grade.

 
Constituents Composition (Min – Max)  
Carbon 3 to 3.5 %  
Silicon 1.8 to 2.4 %  
Manganese 0.60 to 1 %  
Sulphur 0.15 Max  
Phosphorous 0.20 to 0.40 %  
Chromium As required  
Moly As required  
Copper As required  
Nickel As required  
Vanadium As required  
 
Process -  Centrifugal Casting and Shell Moulding.
Hardness -  Min 200 BHN – Max 260 BHN or Min 95 HRB – Max 103 HRB.
Tensile Strength -  kgf / mm2 – min 25.

 

Micro Structure
  • Matrix - Pearlite
  • Graphite – A & B Type
  • Free Ferrite – Max. 5%
  • Free Carbide – Max. 5%
Dimensions
 

Full Finish

Semi Finish

Dry & Wet Type
Wet Type
Dry Type

Inner Diameter

40 - 250 mm

40 - 250 mm 40 - 325 mm
Outer Diameter 45 - 350 mm 45 - 350 mm 45 - 350 mm
Length Up to 375 mm Up to 550 mm Up to 700 mm
 

 
Geometrical Parameters

 

symbol

 Ovality / Roundness (Circularity) - Within 1 thou  
symbole Perpendicularity - Within 1 thou  
symbole Taper - Within 1 thou  
symbole Angularity - Within 1 thou  
symbole Cylindricity - Within 1 thou  
symbole Concentricity - Within 1 thou  
     
Finishing
  • Phosphating / Blackening
  • Chrome Plating (Inner and Outer diameter)
 
 
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