Chemical Composition
Base Element
C (Carbon)
0.75 to 0.85
%    
Co (Cobalt)
11 to 13
%    
Cr (Chromium)
4 to 4.75
%    
Fe (Iron)
56.4 to 63.5
%    (estimate)
Mn (Manganese)
0.2 to 0.4
%    
Mo (Molybdenum)
0.4 to 1
%    
P (Phosphorus)
0.03
%  (maximum)  
S (Sulfur)
0.03
%  (maximum)  
Si (Silicon)
0.2 to 0.4
%    
V (Vanadium)
1.5 to 2.1
%    
W (Tungsten)
18.5 to 21
%    
Others Total
0.75
%  (minimum)  
Other elements
Ni + Cu ≤ 0.75
Composition Note
(1) Chemistry limits include product analysis tolerances.
(2) Where specified, sulfur may be 0.060.15 % to improve machinability. 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.
 
Mechanical Properties
Tabular Data
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DimensionsBrinell Hardness
None Specified≤ 302
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Brinell Hardness
302
 (maximum)  
 
Other Information
Alloy Family
Alloy Group
Country
USA
Standards Body
Description
Tungsten high-speed tool steel.
Specification Type
Specification Status
Equivalent Standards
EN ISO 4957:1999, NF EN ISO 4957:2, DIN EN ISO 4957:21, UNI EN ISO 4957:22, UNE EN ISO 4957:2, BS EN ISO 4957:2, ISO 4957:1999, JIS G 443:215, JIS G 771:2, SAE J438:197
Organization
ASTM
Available forms
Similar Alloys
 



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