An article to understand Stainless Steel Alloy 660 Gr A B D (A286)

Exploring Stainless Steel Alloy 660 (A286): Properties, Applications, and Variants

Stainless Steel Alloy 660 Gr A B D (A286) Plates Supplier

Stainless steel alloy 660, commonly known as Grade 660 or ASTM A286, is a highly versatile material renowned for its exceptional properties and wide-ranging applications. In this article, we will delve into the properties, applications, and variants of stainless steel alloy 660 (A286), shedding light on its significance and diverse uses.

Chemical Composition

Stainless steel alloy 660 (A286) boasts a chemical composition tailored to deliver superior performance in various environments. Its composition typically includes:

  • Chromium (Cr): 24-27%
  • Nickel (Ni): 13.5-16%
  • Molybdenum (Mo): 1.0-1.5%
  • Manganese (Mn): 2.0% max
  • Silicon (Si): 1.0% max
  • Carbon (C): 0.08% max
  • Phosphorus (P): 0.04% max
  • Sulfur (S): 0.03% max

Physical Properties

Stainless steel alloy 660 (A286) exhibits robust physical properties, ensuring reliable performance in demanding applications:

  • Density: 7.8 g/cm³
  • Melting Range: 1364-1424°C (2497-2595°F)
  • Electrical Resistivity: 124 μΩ·cm
  • Thermal Conductivity: 15.5 W/m·K (at 100°C)

Mechanical Properties

Alloy 660 (A286) possesses impressive mechanical properties, contributing to its suitability for high-stress applications:

Tensile Strength950-1050 MPa
Yield Strength725 MPa
Elongation20% (in 50mm)
Hardness (Brinell)248 max


Stainless steel alloy 660 (A286) is distinguished by several key characteristics:

  1. High Strength: Alloy 660 (A286) is renowned for its exceptional strength, making it well-suited for applications where structural integrity is paramount. Its high tensile strength ensures reliability under significant mechanical loads.

  2. Excellent Corrosion Resistance: A defining feature of alloy 660 (A286) is its outstanding corrosion resistance, particularly in harsh environments containing corrosive chemicals, high temperatures, and marine atmospheres. This attribute makes it indispensable in aerospace, chemical processing, and marine applications.

  3. Heat Resistance: Alloy 660 (A286) retains its mechanical properties at elevated temperatures, rendering it suitable for high-temperature applications such as turbine engine components, exhaust systems, and heat exchangers.

  4. Weldability: Despite its formidable strength and hardness, alloy 660 (A286) maintains good weldability, facilitating the fabrication of complex structures and assemblies. Proper welding procedures must be followed to ensure optimal performance.


Stainless steel alloy 660 (A286) finds extensive applications across a spectrum of industries, including:

  1. Aerospace: Alloy 660 (A286) is widely used in the aerospace industry for manufacturing critical components such as turbine engine parts, exhaust systems, and structural components. Its high strength, corrosion resistance, and heat resistance make it an indispensable material for aerospace applications.

  2. Automotive: In the automotive sector, alloy 660 (A286) is employed for producing components such as exhaust systems, turbocharger parts, and engine components. Its exceptional mechanical properties ensure reliable performance in high-stress environments encountered in automotive applications.

  3. Chemical Processing: Alloy 660 (A286) is utilized in chemical processing plants for fabricating equipment and components exposed to corrosive chemicals and high temperatures. It finds applications in reactors, heat exchangers, and piping systems where corrosion resistance and durability are paramount.

  4. Oil and Gas: In the oil and gas industry, alloy 660 (A286) is employed for manufacturing components such as valves, pumps, and piping systems. Its corrosion resistance and high strength make it suitable for withstanding the harsh conditions prevalent in oil and gas exploration and production.

  5. Power Generation: Alloy 660 (A286) finds applications in power generation facilities for producing turbine engine components, boiler tubes, and heat exchangers. Its heat resistance and mechanical properties ensure reliable performance in high-temperature environments encountered in power generation processes.


Alloy 660 (A286) is available in several grades, denoted as Grade A, Grade B, and Grade D, each offering specific properties and characteristics tailored to diverse applications. These variants may differ in their chemical composition, heat treatment, and mechanical properties, providing engineers and designers with options to meet specific requirements.


Stainless steel alloy 660 (A286) offers numerous advantages over alternative materials:

  1. Exceptional Strength: Alloy 660 (A286) boasts superior tensile strength and yield strength, enabling the design of lightweight and high-performance components.

  2. Superior Corrosion Resistance: With its excellent corrosion resistance, alloy 660 (A286) ensures long-term durability and reliability in corrosive environments, contributing to extended service life and reduced maintenance costs.

  3. High Heat Resistance: The heat resistance of alloy 660 (A286) allows for reliable performance in high-temperature applications, ensuring operational integrity under extreme conditions.

  4. Versatility: From aerospace to automotive, chemical processing, oil and gas, and power generation industries, alloy 660 (A286) finds diverse applications, showcasing its versatility and adaptability to various environments and operating conditions.

  5. Weldability: Despite its formidable strength and hardness, alloy 660 (A286) maintains good weldability, facilitating ease of fabrication and assembly, thereby reducing production time and costs.

In conclusion, stainless steel alloy 660 (A286) stands as a versatile and high-performance material with a myriad of applications across multiple industries. Its combination of exceptional strength, corrosion resistance, and heat resistance makes it an ideal choice for critical components subjected to demanding conditions.

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