Welcome to our comprehensive guide on 347 stainless steel, a versatile and corrosion-resistant alloy that plays a crucial role in various industries. As global demand for high-performance materials continues to rise, understanding the properties, applications, and manufacturing processes of 347 stainless steel in China becomes increasingly important for engineers, manufacturers, and consumers alike.

In this guide, readers will explore the unique characteristics that distinguish 347 stainless steel from other alloys, including its resistance to intergranular corrosion and high-temperature strength. We will delve into the manufacturing landscape in China, examining how local production capabilities influence quality, availability, and pricing.

Additionally, we will cover the diverse applications of 347 stainless steel, from aerospace to chemical processing, highlighting its significance in modern engineering and construction. By the end of this guide, readers will gain valuable insights that empower them to make informed decisions regarding the use of this essential material in their projects.

Comprehensive Guide to 347 Stainless Steel

347 stainless steel is a type of austenitic chromium-nickel stainless steel that is stabilized with niobium (columbium) to prevent the precipitation of chromium carbides. This stabilization enhances its performance in high-temperature environments, making it a popular choice in various industries. This guide provides insights into the features, types, and applications of 347 stainless steel, along with comparisons to other stainless steel grades.

Technical Features of 347 Stainless Steel

347 stainless steel is known for its excellent mechanical properties and resistance to corrosion, particularly in high-temperature environments. Below is a comparison table highlighting its key technical features:

Property	Value
Density	7.7 – 8.03 g/cm³ (0.278 – 0.290 lb/in³)
Melting Point	1371 – 1400°C (2500 – 2550°F)
Thermal Conductivity	16.3 W/m·K (212°F)
Coefficient of Thermal Expansion	10.5 x 10⁻⁶/°C (20-600°C)
Electrical Resistivity	72 µΩ·cm (20°C)
Tensile Strength (UTS)	515 MPa min (75 ksi min)
Yield Strength	205 MPa min (30 ksi min)
Elongation	40% min
Hardness (Brinell)	201 max
Creep Strength	38 – 39 MPa (at 750°C)

These features make 347 stainless steel a suitable material for applications requiring high strength and corrosion resistance.

Types of 347 Stainless Steel

347 stainless steel can be categorized into various forms based on its intended applications. Here is a comparison table of the different types of 347 stainless steel:

Type	Description
347 Stainless Steel Tube	Used for high-temperature and corrosive environments, ideal for oil and gas transport.
347 Stainless Steel Plate	Commonly used in chemical processing and boiler applications, offers high strength.
347 Stainless Steel Sheet	Thin and flat, suitable for various fabrication processes in food and chemical industries.
347 Stainless Steel Bar	Used in structural applications, providing high strength and resistance to deformation.
347 Stainless Steel Coil	Flexible for various applications, often used in the automotive and aerospace industries.

These different types cater to specific industrial needs, showcasing the versatility of 347 stainless steel.

Applications of 347 Stainless Steel

347 stainless steel finds applications in several industries due to its unique properties:

1. Oil and Gas Industry

347 stainless steel tubes and pipes are essential for transporting oil, gas, and petrochemicals. Their excellent resistance to corrosion ensures safety and integrity in transportation.

2. Chemical Processing

In chemical processing, 347 stainless steel is used in reactors and heat exchangers due to its ability to withstand corrosive materials at elevated temperatures.

3. Aerospace

Aerospace components, such as exhaust systems and collector rings, benefit from 347 stainless steel’s high-temperature stability and resistance to intergranular corrosion.

4. Food and Beverage

The food processing industry utilizes 347 stainless steel for its sanitary properties and resistance to contamination, making it ideal for food handling equipment.

5. Power Generation

347 stainless steel is employed in boiler tubes and heat exchangers, where it can maintain strength in extreme heat, thus ensuring efficient energy production.

Comparing 347 Stainless Steel with Other Grades

347 stainless steel is often compared to other stainless steel grades to assess its suitability for various applications. Below is a comparison of 347 with two common grades: 304 and 316.

Feature	347 Stainless Steel	304 Stainless Steel	316 Stainless Steel
Temperature Range	800-1500°F	Up to 800°F	Up to 800°F
Corrosion Resistance	Good	Moderate	High
Weldability	Excellent	Good	Good
Cost	Higher	Lower	Higher
Stabilization	Niobium	None	Titanium

This comparison illustrates that while 347 offers superior high-temperature performance, 316 provides better corrosion resistance in chloride environments.

Conclusion

347 stainless steel is a highly versatile and durable material that excels in high-temperature applications and corrosive environments. Its unique properties, such as excellent weldability and resistance to intergranular corrosion, make it a preferred choice across various industries, including oil and gas, chemical processing, and aerospace. As manufacturers like those found at www.China-stainless-steel.com and www.Chinastainless-steel.com continue to innovate, 347 stainless steel remains a critical material in modern engineering.