Chemical Composition
Base Element
C (Carbon)
0.18 to 0.23
%    
Cr (Chromium)
0.4 to 0.6
%    
Cu (Copper)
0.25
%  (maximum)  
Fe (Iron)
96.6 to 98
%    (estimate)
Mn (Manganese)
0.7 to 0.9
%    
Mo (Molybdenum)
0.15 to 0.25
%    
Ni (Nickel)
0.4 to 0.7
%    
P (Phosphorus)
0.035
%  (maximum)  
S (Sulfur)
0.02 to 0.035
%    
Si (Silicon)
0.15 to 0.35
%    
V (Vanadium)
0.05
%  (maximum)  
Balance
Composition Note
1) Fe is listed as a Base element for this material, but its % value is not listed in the specification. The value shown is a calculated one.
2) Cu + 10 × Sn ≤ 0.50 %
 
Mechanical Properties
Tabular Data
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DimensionsYield Strength (MPa)Ultimate Tensile Strength (MPa)Elongation (% strain)
Diameter, 16 mm≥ 600850 to 1200≥ 8
Diameter, 30 mm≥ 550800 to 1150≥ 9
Diameter, 63 mm≥ 520750 to 1050≥ 10
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Yield Strength
520
MPa  (minimum)  
Ultimate Tensile Strength
750 to 1050
MPa    
Elongation
10
% strain  (minimum)  
Notes on Mechanical Properties
Mechanical properties achievable in the core of a 63 mm diameter reference test bar after carburizing, hardening and tempering.
 
Other Information
Material Class
Alloy Family
Alloy Group
Alloy Sub-Group
Country
Standards Body
Designation
20Ni2Cr2Mo2-S
Specification Type
Specification
IS 4432
Specification Year
1988
Specification Status
Specification Status Notes
Reapproved in 2014
Organization
Bureau of Indian Standards (BIS)
Available forms
Similar Alloys
 
Links
 



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