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ALLOY 20       ESPECIFICAÇÕES TÉCNICAS

Alloy 20 was designed specifically to withstand sulfuric acid. Its nickel, chromium, molybdenum and copper levels all provide excellent general corrosion resistance. Restricted carbon plus columbium stabilization permits welded fabrications to be used in corrosive environments, normally without post-weld heat treatment. At 33% nickel, Alloy 20 has practical immunity to chloride stress corrosion cracking. This alloy is often chosen to solve SCC problems, which may occur with 316L stainless.


Chemical Composition, %

 

 

Ni

Cr

Mo

Mn

Cu

Si

C

S

P

Cb+Ta

Fe

MIN

32.5

19.0

2.0

-

3.0

-

-

-

-

8.0 x C 1.0

-

MAX

35.0

21.0

3.0

2.0

4.0

1.0

0.06

0.035

0.035

-

Balance

 

Specifications

UNS: N08020 W. Nr./EN: 2.4660 ASTM: B 463, A 240, B 464, B 473, B 366 ASME: SB-463, SA-240, SB-464, SB-473, SB-366


Common Trade Names

Carpenter® 20, 20CB-3®



 

Carpenter® & 20CB-3® is a registered trademark of Carpenter
 


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