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ASTM B564 UNS N08020 Flange

  • Material:ASTM B564 UNS N08020 Flange
  • production:slip on flange/WN flange/Long WN flange/Threaded flange/SW flange/Blind flange
  • Production standards:ASME B16.5
  • Size:1/2'~60'

PRODUCT DESCRIPTION

UNS N08020

UNS N08020, also known as Alloy 20 is one of the “super” stainless steels developed for maximum resistance to acid attack, because of this, there are various uses for it in both the stainless and nickel industries.
Alloy 20 seems to fall in-between both the stainless and nickel categories, as it does contain characteristics of both; however, the unified numbering system (UNS) does ultimately recognize it as a nickel based alloy, hence the UNS
N08020 number.

Alloy 20 is an austenitic nickel-iron-chromium based alloy with additions of copper and molybdenum. Its nickel content aids in its chloride ion stress and corrosion resistance. The addition of copper and molybdenum provides resistance to hostile environments, pitting and crevice corrosion. Chromium adds to its resistance of oxidizing environments, such as nitric acid, and columbium (or niobium) reduces the effects of carbide precipitation. Most welding methods can be used when working with Alloy 20, except for oxyacetylene welding. It can also be hot formed using the same forces required to hot work austenitic stainless steels. In terms of machineability, outstanding finishes are possible using the same set-up and process speeds used for austenitic stainless steels, such as Stainless Steels 316 or 317.

 

Design features

 Exceptional stress-corrosion resistance in boiling 20% to 40% sulfuric acid

 Sulfuric acid general corrosion resistance

 Ideal fabricability and mechanical characteristics

 Welding produces minimal carbide precipitation

Applications

 Chemical and allied industries

 Pharmaceutical processing

 Food and dye

 Sulfur dioxide (SO2) scrubbers

 Pickling racks

 Tanks

 Severe environments

Product Type

Size Range

Wall/Pressure Class

Seamless Pipe

1/2” through 8”

10S, 40S (Std.), 80S (XH), 160S

Welded Pipe

3” through 12”

10S, 40S

Butt Weld Fittings

1/2” through 12”

10S, 40S (Std.), 80S (XH)

Flanges

1/2” through 12”

150, 300

Pressure Fittings

1/8” through 2”

150 lb Bar, 3000

150 lb Cast Fittings

1/2” through 2”

150

Seamless Tubing

1/8” through 1”

.035, .049, .065, .083, .095, .120

Nipples

1/4” through 2”

40S (Std.), 80S (XH)

Swages

3/8” through 4”

40S (Std.), 80S (XH)

Outlets

1/4” through 2”

10S, 40S (Std.), 80S (XH)

Valves

1/4” through 10”

150#, 300#, 1500-2000#

 


Alloy 20 Chemical Composition %
 

C

Cb

Cr

Cu

Mn

Mo

Ni

P

S

Si

Ta

MAX

8 Times

 

 

MAX

 

 

MAX

MAX

MAX

8 Times

0.07

Carbon-1.00

19.0-21.0

3.0-4.0

2.0

32.0-38.0

32.0-38.0

0.045

0.035

1.0

Carbon-1.00

 

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