Alloy 188

UNS R30188

A cobalt-base alloy with excellent high temperature strength and good oxidation resistance to 2000°F (1093°C). The high chromium level coupled with small additions of lanthanum produce an extremely tenacious and protective scale. The alloy also has good sulfidation resistance and excellent metallurgical stability displayed by its good ductility after prolonged exposure to elevated temperatures. Good fabricability and weldability combine to make the alloy useful in typical gas turbine applications such as combustors, flame holders, liners and transition ducts.

Stock Program

Bars

Standard lengths of 2000 mm up to 6000 mm. Cut to size on request (tolerance +2/-0 mm).

        Ø

10.31 mm              
12.95 mm              
15.88 mm              
19.05 mm              
25.40 mm              
34.93 mm              
35.18 mm              
44.70 mm              
50.80 mm              
57.15 mm              

Sheets / Plates

Dimensions: widths 914/1220 mm, length 3048 mm.

Thickness:

0.40 mm              
0.50 mm              
0.63 mm              
0.81 mm              
0.90 mm              
1.00 mm              
1.27 mm              
1.40 mm              
1.42 mm              
1.60 mm              
1.80 mm              
2.03 mm              
2.36 mm              
2.54 mm              
3.18 mm              
4.76 mm              
6.35 mm              
9.52 mm              

Non-binding information

Limiting
Co Balance    
Cr 20.00 - 24.00 %
Ni 20.00 - 24.00 %
W 13.00 - 16.00 %
Fe max. 3.00 %
Mn max. 1.25 %
Si 0.20 - 0.50 %
C 0.05 - 0.15 %
C 0.02 - 0.12 %
B max. 0.015 %
Density
g/cm³   9.13
lb/in³   0.330
Recommended Welding Products
Electrode
Filler Metal