AISI type 420 stainless steel balls have fair-to-good corrosion resistance and good material strength. They resist corrosion from alcohol, ammonia, food environments, fresh water, many petroleum products and organic materials and some mild acid environments. They are found in bearings, valves, lighters and writing instruments.

AISI 420      
SIZE RANGE   1.00mm (.040") up to 1-1/4"  
GRADES:   25, 50, 100, 500, 1000, 2000  
       
CHEMICAL COMPOSITION      
CHROMIUM   12%-14%  
CARBON   .15% MAX.  
NICKEL      
MANGANESE   1% MAX.  
SILICON   1% MAX.  
PHOSPHOROUS   .040% MAX.  
SULPHUR   .03% MAX.  
       
MECHANICAL PROPERTIES      
HARDNESS ROCKWELL   48 MIN.  
TENSILE STRENGTH   95,000-250,000 PSI  
ELONGATION IN TWO INCHES   8%-25%  
REDUCTION IN AREA   25%-50%  
MODULUS IN ELASTICITY   29,000,000 PSI  
DENSITY   0.279 LBS./CU. IN.  
       
PHYSICAL CHARACTERISTICS      
CORROSION RESISTANCE   FAIR  
MAGNETIC   YES  
       
GENERAL USAGE      
BEARINGS, VALVES, LIGHTERS, WRITING INSTRUMENTS
       

Abbott Ball stanless 420 comparative chart