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High-carbon high-alloy steel, R30012, SAE J775
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Chemical Composition
Base Element
Co (Cobalt)
C (Carbon)
1.1 to 1.7
%
Co (Cobalt)
45.7 to 65.5
%
Cr (Chromium)
26 to 33
%
Fe (Iron)
3
% (maximum)
Mn (Manganese)
1
% (maximum)
Mo (Molybdenum)
1
% (maximum)
Ni (Nickel)
3
% (maximum)
P (Phosphorus)
0.03
% (maximum)
S (Sulfur)
0.03
% (maximum)
Si (Silicon)
0.4 to 2
%
W (Tungsten)
7 to 9.5
%
Composition Note
Co 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.
Other Information
Material Class
Ferrous Alloy
Alloy Family
High-Alloy Steel (Corrosion and Heat Resistant, Stainless, and Nickel Steels)
Alloy Group
Miscellaneous or unclassified
Alloy Sub-Group
High-carbon high-alloy steel
Country
USA
Standards Body
SAE (USA)
Description
Engine poppet valve, facing alloy.
Alternate Name
formerly VF 7, commercially Stellite 12
Designation
R30012
Specification Type
Standard
Specification
SAE J775
Specification Year
1993
Specification Status
Active
Specification Status Notes
active 1993
Source
Worldwide Guide to Equivalent Irons and Steels, 5th ed. ASM International 2006
Available forms
Wrought
Similar Alloys
Click here to find similar alloys
Links
Organizations
SAE, International (SAE) (SAE J)
No warranty is given for the accuracy of these data
Copyright © 2024 ASM International®
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