Alloy 20 Pipe Fittings & Flanges

Alloy 20 is an austenitic alloy that is formed by combining nickel-iron-chromium it has a higher level of resistance to acid attack, especially sulfuric acid. Alloy 20 is also called Carpenter 20 and this superalloy has enhanced resistance to general corrosion, pitting and crevice corrosion in chemicals that carry chlorides as well as sulfuric, phosphoric and nitric acids. This nickel alloy is the best combination of outstanding corrosion resistance, increased mechanical properties and comparatively feasible fabrication. Though, the major use of carpenter 20 in sulfuric acid related factories.
Properties of Alloy 20
• Exceptional common corrosion resistance to sulfuric acid
• Resistant to chloride stress corrosion cracking
• Increased mechanical properties and fabricability
• Controlled carbide precipitation in the process of welding
• Great resistance to hot sulfuric acids
Applications of Alloy 20
• Used in rubber manufacturing apparatus
• Equipment used in pickling and to clean acids
• Food and dye manufacturing
• Chemical process piping and reactor vessels
• Manufacturing of pharmaceuticals, plastics and organic chemicals
• Bubble caps

Standards – Alloy 20 Pipe Fittings & Flanges

Standard Specification for Factory-Made Wrought Nickel and Nickel Alloy FittingsASTM B 366
Standard Specification for Forged or Rolled UNS N06030, UNS N06022, UNS N06035, UNS N06200, UNS N06059, UNS N10362, UNS N06686, UNS N08020, UNS N08024, UNS N08026, UNS N08367, UNS N10276, UNS N10665, UNS N10675, UNS N10629, UNS N08031, UNS N06045, UNS N06025, and UNS R20033 Alloy Pipe Flanges , Forged Fittings , and Valves and Parts for Corrosive High-Temperature Service.ASTM B 462

Mechanical Properties – Alloy 20 Pipe Fittings

Tensile , Yield & Elongation shall conform to their respective parent material standards.

Mechanical Properties – Alloy 20 Flanges

Tensile Strength : Unit – ksi (MPa) , Minimum
Yeild Strength : 0.2 % Offset , Unit – ksi (MPa) , Minimum
Elongation : in 2″, Unit : % , Minimum
Reduction Of Area : Unit : % , minimumValues as per ASTM B 462

Condition & GradeTensile StrengthYeild StrengthElognationReduction Of Area
Annealed80 (551) 35 (241)3050

Chemical Industry

Elbow / Bends

Alloy 20 Elbow / Bends

Long Radius / Short Radius

45˚ , 90˚ & 180˚


Alloy 20 Reducers




Alloy 20 Caps


Alloy 20 Stub Ends




Alloy 20 Flanges




Lap Joint


Alloy 20 Fasteners