Chemistry
GRADES 1008   1010   1020   1026
  Chemical
Analysis
% 		  Carbon   0.10 max.     0.08-0.13     0.17-0.23     0.22-0.28  
Manganese 0.25-0.50   0.30-0.60   0.30-0.60   0.60-0.90  
Phosphorus, max 0.025 0.025 0.025 0.025
Sulphur, max 0.015 0.015 0.015 0.015
Silicon        
Chromium        
Molybdenum        
Vanadium        
  As Drawn
Standard
Mechanical
Properties*
(Min.) 		  Yield Strength,
Ksi (Mpa) 		  50 (345)     50 (345)     60 (414)     70 (483)  
Tensil Strength,
Ksi (Mpa) 		60 (414)   60 (414)   70 (483)   80 (552)  
Elongation
(% in 2" or 50mm) 		5   5   5   5  
Hardness Rb 73   73   80   85  
 
  Drawn and Stress Relieved
    Yield Strength,
Ksi (Mpa) 		  45 (310)     45 (310)     55 (379)     65 (448)  
Tensil Strength,
Ksi (Mpa) 		55 (379)   55 (379)   65 (448)   75 (517)  
Elongation
(% in 2" or 50mm) 		12   12   10   10  
Hardness Rb 68   68   75   80  
Chemistry
GRADES ST52.3 ATP90 Impact
620 		  1035
  Chemical
Analysis
% 		  Carbon   0.12-0.17     0.12-0.17     0.10-0.16     0.31-0.38  
Manganese 1.20-1.60   1.20-1.60   1.20-1.60   0.60-0.90  
Phosphorus, max 0.025 0.025 0.025 0.025
Sulphur, max 0.010 0.010 0.010 0.015
Silicon 0.15-0.30 0.15-0.30 0.15-0.30 0.15-0.30
Chromium        
Molybdenum        
Vanadium     0.06-0.10  
  Drawn and Stress Relieved
Standard
Mechanical
Properties*
(Min.) 		  Yield Strength,
Ksi (Mpa) 		  75 (517)     90 (621)     90 (621)     75 (517)  
Tensil Strength,
Ksi (Mpa) 		85 (586)   100 (690)   100 (690)   85 (586)  
Elongation
(% in 2" or 50mm) 		18   15   15   10  
Hardness Rb 85   92   92   85  
Chemistry
GRADES 1526   4130        
  Chemical
Analysis
% 		  Carbon   0.22-0.29     0.28-0.33            
Manganese 1.10-1.40   0.40-0.60        
Phosphorus, max 0.025 0.025    
Sulphur, max 0.015 0.015    
Silicon 0.15-0.30 0.15-0.35    
Chromium   0.80-1.10    
Molybdenum   0.15-0.25    
Vanadium        
  Drawn and Stress Relieved
Standard
Mechanical
Properties*
(Min.) 		  Yield Strength,
Ksi (Mpa) 		  85 (586)     80 (552)            
Tensil Strength,
Ksi (Mpa) 		95 (655)   90 (621)        
Elongation
(% in 2" or 50mm) 		15   10        
Hardness Rb 90   87        
 


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