Alloy 20 (UNS N08020), also known as Carpenter 20, is a nickel-iron-chromium stainless steel alloy. This steel is austenitic, meaning it cannot be hardened by heat treatment. It has corrosion resistance and good mechanical properties at low and high temperatures. Let’s take a closer look at the composition, mechanical properties and uses of Alloy 20.
What is Alloy 20?
UNS N08020 is a nickel-iron-chromium alloy that is highly resistant to corrosion and other harmful elements. It can easily withstand extreme temperature fluctuations and is therefore commonly used in machinery and equipment such as storage tanks and pumps. The alloy has excellent strength and toughness properties, making it the first choice for those looking for a material that is both strong and economical. Additionally, the alloy’s good ductility means it can be formed or manipulated into any desired shape. All of these noteworthy properties make Alloy 20 an extremely practical choice for manufacturing products that will come into contact with corrosive substances or high temperatures.
Alloy 20 Chemical Composition
Alloy 20 contains nickel (30%), chromium (19-22%), molybdenum (2-3%), manganese (1.5%), iron (balance), silicon (0.75%), sulfur (0.035%) and carbon ( 0.07%) balanced composition. The balanced combination of these elements results in steel alloys with good strength and excellent corrosion resistance to acidic and alkaline environments. It has a higher resistance to stress corrosion cracking than most other alloys.
Element content (%)
Iron, Fe 35
Nickel, Ni 32-38
Chromium, Cr 19-21
Copper, Cu 3-4
Manganese, Mn ≤2
Molybdenum, Mo 2-3
Niobium, Nb ≤1
Silicon, Si ≤1
Carbon, C ≤0.07
Phosphorus, P ≤0.045
Sulfur, S ≤0.035
Alloy 20 properties:
Alloy 20 is an amazing metal alloy with fascinating properties and a wide range of applications. It is a nickel-iron-chromium stainless steel most commonly used in the chemical, food and pharmaceutical industries. Noteworthy features of Alloy 20 are its acid resistance and excellent formability, making it well suited for a variety of high temperature applications, including heat exchangers, pressure vessels, condensers and valves. It also contains molybdenum to enhance corrosion resistance at high temperatures. High work hardening capability makes it ideal for manufacturing components requiring higher throughput and greater tensile strength. In addition to its unique combination of mechanical properties, Alloy 20 is highly resistant to stress corrosion cracking and sulfides such as sulfuric acid. For these reasons and more, you can trust Alloy 20 to have all the great properties you need in any industrial application.
Mechanical behavior
Mechanical properties of Alloy 20 include tensile strength, ranging from 80ksi minimum to 145ksi maximum, and 0.2% yield strength, ranging from 40ksi minimum to 95ksi maximum. In hot-rolled product form or in the annealed condition, elongation may be a minimum of 50% to a maximum of 60% over 2 inches for cold finished forms in all conditions.
Properties Metric units Imperial units:
Tensile strength (annealed) 620 MPa 89900 psi
Yield strength (annealed) 300 MPa 43500 psi
Elongation at break (annealed) 41% 41%
Alloy 20 Equivalent Materials:
ASME SB-462 – SB-464
ASME SB-468
ASTM B 462-B 464
ASTM B 468
ASTM B 472-B 474
ASTM B 751
What are the uses of alloy 20?
Due to its good mechanical strength and excellent corrosion resistance over a wide temperature range, UNS N08020 is used in many industries including pharmaceuticals, chemical processing, power generation, pulp and paper production, food processing, oil and gas exploration and production, Wastewater treatment systems and nuclear fuel reprocessing plants. It can be used in many applications such as pumps, valves and fittings; pickling equipment; fasteners; flanges; heat exchangers; pressure vessels; storage tanks; piping systems and assemblies; nuclear fuel element spacers; condensers and evaporators; Piping system components and supports; centrifuges and mixers; hydrogenation reaction vessels/towers/piping systems; trays and baskets for handling corrosive materials.
Production of plastics and synthetic fibers
Chemical and Petroleum Processing Equipment
mixing tank
Heat Exchanger
Process piping
in conclusion
Alloy 20 is an austenitic stainless steel that provides excellent corrosion resistance in acidic and alkaline environments while maintaining good mechanical properties over a wide temperature range. It contains nickel (30%), chromium (19-22%), molybdenum (2-3%), manganese (1.5%), iron (balance), silicon (0.75%), sulfur (0.035%) and carbon (0.07 %), making it ideal for use in many industries such as pharmaceutical processing, chemical processing, power generation, pulp and paper production, etc., where it can be used in pumps, valves and fittings, pickling equipment, fasteners, flanges, heat exchangers , pressure vessels, storage tanks, piping systems and components, etc. If you are looking for an alloy that provides excellent corrosion resistance in a variety of demanding industrial environments while maintaining strong mechanical properties, then Alloy 20 should be your first choice!
Tianjin Anton Metal Manufacture Co., Ltd. is a company specializing in the production of various nickel-based alloys, Hastelloy alloys and high-temperature alloy materials. The company was established in 1989 with a registered capital of 10.0 million, specializing in the production and sales of alloy materials. Anton Metal’s products are widely used in aerospace, chemical industry, electric power, automobile, nuclear energy and other fields, and can also provide customized alloy material solutions according to customer needs. If you need to know the price consultation of alloy materials or provide customized alloy material solutions, please feel free to contact the sales staff.
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Post time: Nov-18-2023
