Haynes® 188 Alloy
W.Nr 2.4683
Applications
High Temperature and Corrosion Resistant Applications
Description
Haynes® Alloy 188 is a cobalt-nickel-chromium-tungsten alloy with excellent high temperature tensile strength, sulfidation, and oxidation resistance up to 1095°C (2000°F) for long term exposures. Haynes® Alloy 188 is not age hardenable but may be cold worked to achieve higher tensile and yield strength. Haynes® Alloy 188 responds well to conventional forming and welding techniques.
Industries Supplied
Military and Commercial Aerospace, Chemical Processing, and Land-Based Gas Turbines
Nominal Composition
C: 0.05 – 0.15
Mn: 1.25 max
Si: 0.20 – 0.50
P: 0.02 max
S: 0.015 max
B: 0.015 max
Ni: 20.0 – 24.0
Cr: 20.0 – 24.0
Co: 30 (bal)
W: 13.0 – 16.0
La: 0.03 – 0.12
Fe: 3.00 max
Physical Properties
Density: 0.24 lb/in3, (8.98 g/cm3)
Modulus of Elasticity (E):
At 70°F (20°C): 33.7 x 103 ksi (232 GPa)
Modulus of Rigidity (G):
At 70°F (20°C): 13 x 103 ksi (90 GPa)
Coefficient of Expansion:
9.1 µin/in-°F (75-1800°F)
16.5 µm/m-°C (25-1000°C)
Electrical Resistivity: 39.6 µohm-in, (101.0 µohm-cm)
Thermal Conductivity: 72 Btu-in/ft2-hr-°F, (10.4 W/m-°C)
Applicable Specifications
Wire & Bar: AMS 5772, GE B50A712
Typical Mechanical Properties
- Annealed
- Heat Treatment: 2150°F (1177°C)
- Tensile Strength: 125 ksi min
- Suggested Operating Conditions: -300°F to 2000°F (-185°C to 1095°C)
- Spring Temper
- Tensile Strength: 200 ksi min
- Suggested Operating Conditions: -300°F to 2000°F (-185°C to 1095°C)
Haynes® is a registered trademark of Haynes International, Inc.
For further information Contact:
Contact Us
Phone: 1 847 695 1900
Elgiloy Specialty Metals – Wire Products
356 N.Cross Street
Sycamore, IL 60178 USA
Limitation of Liability and Disclaimer of Warranty:
• The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only. It is not intended for engineering or design.
• Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., does not recommend or endorse any material for any particular end use or application.
• The data included in this data sheet are typical values and may vary.
• Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.
• In no event will Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., be liable for any damages whatsoever arising from the use of the information included in the data sheets.
