The Application and Usage of Alloy 20


Mix 20 is definitely an iron-starting, austenitic combination with exceptional corrosion resistance to a number of distinct press and proves to become beneficial in several applications for example Flue gas desulfurization, chemical processing, food processing and storage in addition to pharmaceutical programs to name a few. Program of the combination could result in real financial savings when carefully in comparison with larger-expense Alloys to find out if the resistance that is essential is purchased within the chosen media. Programs are limited by a maximum temperature of 1000°F per ASME.

Resistance to Rust

Resistance to sulfuric acid is very outstanding however useful resistance is shown by the Alloy in acid, nitric acid together with in chloride environments. Alloy 20 is a wonderful option when chloride stress corrosion cracking is an issue pitting.

Fabrication and Heat Treatment

The alloy 20 tubing can be produced by either hot- cool or functioning -function using standard approaches. Warm forged content must be warmed with watchful temperature-control protecting the substance not slide below 1800°F prior to forging between. After warm performing, anneal the substance by heat to 1850°F and 1725°F to get a minimum of 30minutes per inch of breadth accompanied by water quench.

While stress-relieving is ideal, warmth to some temperature below 1000°F accompanied by water quench following the desired time at temperature continues to be proven. Annealing Alloy 20 should be between for 30 minutes at heat per inch of depth. A lowered hardness can be had by heating to 2100°F but his could have an adverse effect on the stabilization of the mix.

Welding Alloy 20 is commonly performed via, TIG, MIG as well as submerged arc welding (SAW) employing either the related product material, ER320LR for TIG and MIG and E320LR for SAW. When welding to distinct materials such as for example higher or 316 alloys such as C276 and Alloy 22, AWS ERNiCrMo-3 can be utilized for TIG and MIG when using ENiCrMo-3 for SAW.


  • ASME SB473, N08020, ASTM B473 WARM COMPLETED – ASTM B 463, 3.1
  • ASME SA 240, ASME SB 366, ASME SB 463, ASTM A 240, ASTM B 366

alloy 20 tubing

Common Trade Names

  • Incoloy® Mix 020, Carpenter® 20, 20CB -3®
  • Incoloy® is just a trademark of Specific Alloys Corporation.
  • Carpenter® and 20CB-3® are trademarks of Carpenter.

The alloy 20 tubing is among the alleged “Super” stainless steel that has been designed for utmost resistance to attack that is acid. It’s chromium, nickel. Molybdenum and copper material subscribe to its general opposition to chlorideion stress corrosion basic and cracking pitting attack. The blend is stabilized with columbium to minimize precipitation during welding. It has physical properties that are good and can be created with comparative simplicity. Even though mix was made for used in sulfuric acid associated sectors, t discovers large application throughout the chemical processing sector. In addition, it can be used for fuel, food, control drugs, solvents explosives and lots of different items.

Availability – Alloy 20

  • Seamless Tube 1/2″ – 8″
  • Weld Pipe 3″ – 12″
  • Stress Fixtures 1/2″ – 2″
  • 150# Fittings 1/ 4″ – 2″
  • Tubing 1/4″ 3/8, “2″,

Design Features – Alloy 20

  • Exceptional resistance to tension-corrosion in boiling 20 to 40 acids, cracking.
  • Superb common corrosion resistance to acid.
  • Exemplary fabricability and mechanical properties
  • Nominal carbide precipitation.

Typical Applications – Alloy 20

  • Chemical and allied industries
  • Food and dye production
  • Heat exchangers
  • SO2 scrubbers and other severe environments
  • Tanks
  • Pickling racks
  • Valves

Tensile Requirements – Alloy 20

  • Tensile Strength (KSI): 80
  • Yield Strength (KSI): 35 (KSI can be converted to MPA (Megapascals) by multiplying by 6.895.)

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