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Haynes 188 Alloy

Common Trade Names: 
Haynes 188, Alloy 188, Udimet 188, Conicro 4023,

Haynes 188 Alloy is a Cobalt-Nickel-Chromium-Tungsten Alloy that combines excellent high temperature strength with very good resistance to oxidizing environments up to 2000°F (1095°C).

HAYNES 188 Alloy is a solidsolution-strengthened material which combines excellent high temperature strength with good tabricability at room temperature. It is particularly effective for very long-term applications at temperatures of 1200°F (650°C) or more. It is stronger than nickel-base solid-solutionstrengthened alloys, and far stronger than simple nickel-chromium or iron-nickel-chromium heat-resistant alloys.

This can allow for significant section thickness reduction when it is substituted for these
materials.

Available Product Forms: 
Plate, Sheet, and Bar.
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Specifications

Haynes 188 is covered by the following specifications:

UNS R30188

Rod, Bar, Wire and Forging Stock: AMS 5772

Plate, Sheet and Strip: AMS 5608

Welding Wire: AMS 5801

Trademark Notice: Some names are trade names and/or trademarks of specific manufacturers. American Special Metals, Corp. is not affiliated with any manufacturer(s). Orders will be filled to meet specifications from any available source(s). Names are listed solely for reference to help identify products consistent with listed specifications.

Haynes 188 Alloy is a Registered Trademarks of Haynes International and Its subsidiaries.

Chemical Composition

 

Cr

Ni

Co

W

La

B

C

Fe

Mn

Si

P

S

MIN

20.0

20.0

-

13.0

0.02

-

0.05

-

-

0.2

-

-

MAX

24.0

24.0

Balance

16.0

0.12

0.015

0.015

3.0

1.25

0.5

0.02

0.015

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