ThePipingMart Blog Grades Alloy AL 200 (UNS N02200) – Composition, Properties, and Uses

Alloy AL 200 (UNS N02200) – Composition, Properties, and Uses

Alloy AL 200

When choosing a suitable material for your project, it is crucial to consider its composition and properties. One material that is gaining attention for its versatility and corrosion resistance is Alloy AL 200. Due to its unique features, this material is widely used in many industries, from aerospace to oil and gas. This blog will explore the alloy AL 200 composition, mechanical and physical properties, uses, corrosion resistance, and welding techniques.

Alloy AL 200 Composition

Alloy AL 200 is a nickel-based alloy with a composition of 99.6% nickel, providing high temperature and corrosion resistance. It also contains small amounts of iron, cobalt, and manganese, contributing to its mechanical properties. AL 200 has low carbon content compared to other alloys, improving its resistance to graphitization and minimizing sensitivity to weld cracking.

Element Content (%)
Nickel, Ni 99.8
Carbon, C ≤ 0.15
Silicon, Si 0.05
Iron, Fe 0.05
Copper, Cu 0.02
Manganese, Mn 0.02
Sulfur, S 0.002

Alloy AL 200 Mechanical Properties

Alloy AL 200 has excellent mechanical strength, especially at elevated temperatures. It has a yield strength of up to 65 psi and tensile strength of 110 psi. This alloy also exhibits excellent ductility, making it a perfect choice for applications involving high-temperature environments. Additionally, AL 200 has a low coefficient of thermal expansion, making it resistant to thermal stress and deformation.

Properties Metric Imperial
Tensile strength (typical annealed) 462 MPa 67000 psi
Yield strength (@strain 0.200%, typical annealed) 148 MPa 21500 psi
Elastic modulus 207 GPa 30000 ksi
Shear modulus 81 GPa 11700 ksi
Poisson’s ratio 0.31 0.31
Elongation at break (typical in 2″, annealed) 47% 47%
Hardness, Rockwell B (typical annealed) 45 45

Alloy AL 200 Physical Properties

Besides its mechanical properties, alloy AL 200 also possesses superior physical properties. It has a density of 8.9 g/cm3, a melting point of 2255°F, and a specific heat capacity of 0.105 Btu/lb/°F. These physical properties make it an ideal material for applications requiring high-temperature resistance and thermal stability.

Properties Metric Imperial
Density 8.90 g/cm³ 0.322 lb/in³
Melting point 1440°C 2625°F

Alloy AL 200 Equivalents

  • ASTM A240
  • ASTM A479
  • ASTM A789
  • ASTM A790
  • ASTM A815

Alloy AL 200 Uses

Alloy AL 200 has a wide range of industrial uses due to its unique features. It’s high temperature and corrosion resistance make it an excellent material for chemical processing equipment, heat exchangers, kilns, refractory anchors, and furnace parts. It is also widely used in the aerospace industry for high-temperature engine components such as turbine blades, combustors, and exhaust systems.

Alloy AL 200 Corrosion Resistance

One of the most significant benefits of alloy AL 200 is its superior corrosion resistance, even in harsh chemical environments. It is highly resistant to strong acids and alkalis, reducing the chances of material failure. This makes it an ideal choice for applications in chemical processing, power generation, and oil and gas industries.

Alloy AL 200 Welding

Alloy AL 200 has excellent weldability. It can be welded using various techniques such as gas metal arc welding, shielded metal arc welding, and gas tungsten arc welding. However, it is crucial to avoid heat input that exceeds 8,000 joules per inch of weld length, which may cause deformation due to thermal stress.


In conclusion, Alloy AL 200 is a versatile, corrosion-resistant material suitable for many industrial applications. Its unique combination of mechanical, physical, and corrosion-resistant properties have made it a popular choice, especially in high-temperature applications. Whether you’re working in aerospace, chemical processing, or oil and gas industries, AL 200 is an excellent choice for your project. Choose Alloy AL 200 for its durability, longevity, and proven performance.

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