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188       ESPECIFICAÇÕES TÉCNICAS

Alloy 188 is a cobalt base superalloy with a unique combination of high temperature strength and oxidation resistance, along with adequate ductility after prolonged exposure to the 1400-1600°F temperature range.

Cobalt alloys have an inherent advantage over the nickel base grades in high temperature creep. Alloy 188 is solid solution strengthened by a 14% tungsten addition, and further by M6C and M23C6 carbides. Alloy 188 is readily fabricated, being welded by both manual and automatic methods including electron beam, gas tungsten arc and resistance welding.


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

 


Specifications


UNS: R30188 W. Nr./EN: 2.4683 AMS: 5608, 5801 PWA: 1042


Common Trade Names

Alloy 188, Inconel 188


 

188 is a Trademark of Haynes International


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