347 Stainless Steel: Compositions, Properties and Applications

Imagine that you are standing on a magnificent bridge, which is tough and durable, able to withstand the challenges of wind and rain. The key material of this bridge is 347 stainless steel. This magical material not only plays a vital role in the construction industry but also performs well in aerospace, petrochemical, food processing, and other fields. So, what exactly is 347 stainless steel? What are its unique compositions and properties? What fields does it apply to? Let’s explore this fascinating world of metals together!

The chemical composition of 347 stainless steel is as follows:

1. 1. chromium (Cr): 17.00% – 19.00%
   2. nickel (Ni): 9.00% – 13.00%
   3. niobium (Nb/Ta): 10*C – 1.10% (C is the carbon content)
   4. manganese (Mn): 2.00% (maximum value)
   5. silicon (Si): 1.00% (maximum value)
   6. phosphorus (P): 0.040% (maximum value)
   7. sulfur (S): 0.030% (maximum value)
   8. carbon (C): 0.08% (maximum value)

In addition, this kind of stainless steel also contains small amounts of iron, nitrogen, molybdenum, and other impurity elements.

Mechanical Properties of 347 Stainless Steel

This kind of stainless steel has the following mechanical properties:

1. 1. Tensile Strength: ≥515 MPa
   2. Yield Strength: ≥205 MPa
   3. Elongation: ≥40%
   4. Hardness: ≤201HB; ≤95HRB; ≤219HV

Among them, tensile strength refers to the maximum stress value that a material can withstand during tensile testing, while yield strength refers to the maximum stress value that a material can withstand when it begins to undergo plastic deformation. Elongation indicates how much percentage a material can stretch before breaking, while hardness refers to the material’s ability to resist scratches and indentation. These mechanical properties can be adjusted and optimized according to specific application requirements.

Physical Properties of 347 Stainless Steel

This type of stainless steel is a high-temperature stainless steel with excellent physical properties. The following are its main physical properties:

1. 1. Density: 7.96 g/cm³;
   2. Melting Point: 1398-1446℃;
   3. Thermal Expansion Coefficient: 16.5 μm/(m·K) (20-100℃);
   4. Thermal Conductivity: 16.2 W/(m·K) (100℃);
   5. Resistivity: 73.0 nΩ·m (20℃).

In addition, this type of stainless steel also has excellent corrosion resistance, especially for high-temperature environments, and good resistance to oxidation.

Applications of 347 Stainless Steel

The main applications of 347 stainless steel are as follows:

1. 1. Chemical Industry: Due to its good corrosion resistance and high-temperature strength, 347 stainless steel is often used in the manufacture of chemical equipment, storage tanks, and pipelines.
   2. Automotive Industry: It can be used in the manufacture of engine exhaust pipes, turbochargers, and other automotive components that require high temperature and corrosion resistance.
   3. Oil and Gas Industry: It is widely used in various equipment and pipelines in the process of oil and gas exploration, processing, and transportation.
   4. Medical Equipment Industry: Due to its excellent biocompatibility, 347 stainless steel is widely used in medical equipment, surgical instruments, and other fields.
   5. Food Processing Industry: 347 stainless steel can be used as a material for food processing equipment because it meets hygiene standards and is easy to clean and disinfect.

More about 347 Stainless Steel

This type of stainless steel is a chromium-nickel alloy stainless steel containing niobium. It has good high-temperature corrosion resistance and is suitable for use in high-temperature environments, such as heaters and furnaces. In addition, 347 stainless steel also has excellent oxidation resistance and corrosion resistance, which performs well in some chemical industry and marine applications.

Why Choose Sino Stainless Steel?

Thank you for reading our article and we hope it can help you to have a better understanding of the compositions, properties, and applications of 347 stainless steel. If you want to find more information about stainless steel, we’d advise you to visit Sino Stainless Steel for more information.

As a leading supplier of stainless steel products across the world, Sino Stainless Steel provides customers with high-quality stainless steel products such as stainless steel coils, stainless steel strips, stainless steel sheets, stainless steel bars, stainless steel tubes, and stainless steel wires at a very competitive price.