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Haynes™ Ultimet Material Property Data Sheet

Do you need custom fasteners created with Haynes™ Ultimet? Since our inception, Vegas Fastener Manufacturing has met every challenge of providing Quality, Timely, Cost-effective solutions for specialty fastener applications. Every product is built to your specifications, using your prints if necessary.

Below are the technical specifications of the Haynes™ Ultimet Bar Stock we have available to meet your needs.

Haynes™ Ultimet


Subcategory: Metal; Stainless Steel;

Component    Wt. % Component    Wt. %
Coa 54%   Cr 26%  
Ni 9%   Mo 5%  
Fe 3%   W 2%  
Mn 0.8%   Si 0.3%  
N 0.8%   C 0.06%  

Material Notes:
Ultimet alloy is cobalt-chromium alloy which offers excellent corrosion resistance comparable to that of Hastelloy alloys. Ultimet alloy exhibits outstanding wear resistance similar to that of the Stellute alloys. Also, Ultimet alloy possesses high tensile strength comparable to many duplex stainless stells combined with excellent impact toughness and ductility.

Some of the areas of use for Ultimet alloy are Agitatitors, blenders, bolts, dies, extruders, fan blades, filters, glass plungers, nozzels, pumps, rolls, screw conveyors, and valve parts.

A cobalt-base alloy with exceptional resistance to galling, cavitation erosion, slurry erosion, liquid droplet impact, and various forms of corrosive attack. ULTIMET alloy exhibits superior weldability and may be used to weld overlay critical surfaces to improve their resistance to corrosion-wear. The alloy is available in a variety of wrought forms, as well as castings and powders.


Physical PropertiesMetricEnglishComments
Density8.47 g/cm30.306 lb/in³ 
Melting Temperature2430-2470 oF1332-1354 oC 

Mechanical Properties
Tensile Strength, Ultimate147 Ksi 
Elongation at Break38 %38 % 
Diamond Pyramid Hardness296  
Rockwell HardnessRc 30