Stainless Steel 347 1.4550

Stainless steel is a cornerstone material in modern industry, renowned for its durability, versatility, and resistance to corrosion. Among the plethora of stainless steel grades available, Stainless Steel 347, designated as 1.4550, stands out for its unique properties and wide-ranging applications. In this article, we will delve into the characteristics, applications, and fabrication techniques associated with Stainless Steel 347.

Stainless Steel 347 1.4550

Characteristics of Stainless Steel 347 (1.4550)

Stainless Steel 347 (1.4550) boasts a remarkable set of properties that make it highly sought after for various engineering applications. Let's explore some of its key characteristics:

PropertyValue
Chemical Composition17% Chromium, 10% Nickel, 0.08% Carbon, 2% Manganese, 1% Silicon
Density7.96 g/cm³
Melting Point1398 - 1446°C
Tensile Strength520 - 720 MPa
Yield Strength≥ 205 MPa
Elongation at Break≥ 35%
Modulus of Elasticity200 GPa
Thermal Conductivity16.2 W/m·K (at 100°C)
Specific Heat Capacity500 J/kg·K (at 20°C)
Electrical Resistivity0.75 µΩ·m (at 20°C)
Coefficient of Thermal Expansion16.0 x 10^-6 /K (20-100°C)

Applications of Stainless Steel 347 (1.4550)

Stainless Steel 347 (1.4550) finds extensive applications across diverse industries due to its exceptional properties. Some notable applications include:

  1. High-Temperature Environments: Stainless Steel 347 is widely used in applications requiring resistance to high temperatures, such as furnaces, heat exchangers, and aerospace components.

  2. Chemical Processing: Due to its corrosion resistance, Stainless Steel 347 is utilized in chemical processing equipment, including reactors, pipelines, and storage tanks.

  3. Oil and Gas Industry: In the oil and gas sector, Stainless Steel 347 is employed in offshore platforms, pipelines, and refinery equipment, where resistance to corrosion and high temperatures is paramount.

  4. Automotive Applications: Components exposed to elevated temperatures in automotive exhaust systems benefit from the high-temperature strength and corrosion resistance of Stainless Steel 347.

  5. Food Processing: Stainless Steel 347 is favored in food processing equipment, ensuring hygienic conditions and resistance to corrosion from acidic food products.

Fabrication of Stainless Steel 347 (1.4550)

Fabricating components from Stainless Steel 347 requires adherence to specific techniques to ensure optimal performance and longevity. Key fabrication considerations include:

  • Welding: Stainless Steel 347 can be welded using standard techniques such as TIG welding, MIG welding, and plasma arc welding. Preheating may be necessary for thicker sections to minimize distortion.

  • Machining: While Stainless Steel 347 is machinable, it tends to work-harden during machining. Therefore, carbide tooling and low cutting speeds are recommended to achieve the desired finish.

  • Forming: Stainless Steel 347 can be cold-formed using standard methods, but greater force may be required due to its higher strength compared to austenitic stainless steels.

Comparative Analysis

PropertyStainless Steel 347 (1.4550)Stainless Steel 304 (1.4301)Stainless Steel 316 (1.4401)
Chromium Content (%)171816
Nickel Content (%)10810
Carbon Content (%)0.080.080.08
Maximum Service Temperature (°C)870870870

Stainless Steel 347 (1.4550) exemplifies the pinnacle of stainless steel engineering, offering a potent combination of high-temperature strength, corrosion resistance, and mechanical properties. Its versatility and reliability make it indispensable across a multitude of industries, from chemical processing to automotive engineering. With proper fabrication techniques, Stainless Steel 347 can be transformed into robust components that meet the stringent demands of modern engineering applications.

In summary, Stainless Steel 347 (1.4550) stands as a testament to the enduring legacy of stainless steel as a cornerstone material in engineering and manufacturing.


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