thermal conductivity of sus316 stianless steel pipe

If you are looking for high-performance stainless steel pipes for critical applications, understanding the thermal conductivity of SUS316 stainless steel pipes is essential for making informed purchasing decisions. SUS316, also known as 316 Austenitic Stainless Steel, is widely used in industries such as chemical processing, food and beverage, marine, and pharmaceutical equipment, where both corrosion resistance and thermal performance matter.

 

What Is the Thermal Conductivity of SUS316 Stainless Steel Pipe?

SUS316 (also known as 316/1.4401/X5CrNiMo17-12-2) is an austenitic stainless steel with a lower thermal conductivity compared to carbon steel or copper, which remains stable even at high temperatures.

The thermal conductivity of SUS316 stainless steel pipe at room temperature (approximately 10°C) is approximately 16.3 W/(m·K), increasing slightly with temperature. For example, it is approximately 17 W/(m·K) at 10°C and approximately 22 W/(m·K) at 10°C. This value is relatively low compared to other metals such as aluminum or copper, which is due to the alloy's crystal structure and the addition of alloying elements such as chromium, nickel, and molybdenum.

Temperature (°C)	Thermal Conductivity (W/m·K)
20°C	16.2 W/m·K
100°C	16.3 W/m·K
500°C	21.5 W/m·K

 

Why SUS316 Pipe Performs Well in Heat Transfer Systems? 

SUS316 stainless steel round tubes contain molybdenum (Mo) to enhance corrosion resistance, maintaining long-term stability in chlorinated, acidic, or seawater environments. They have a low coefficient of thermal expansion, preventing deformation and leakage in high-temperature systems. Long-term temperature resistance can reach 870°C with minimal performance loss at high temperatures. Furthermore, the smooth inner wall (low resistance) improves fluid velocity and thermal efficiency.

Therefore, SUS316 stainless steel tubes are widely used in heat exchanger tubes, boiler tubes, steam pipes, hot and cold circulation systems, and food-grade hot water systems.

 

Applications of SUS316 Stainless Steel Pipe
Chemical processing heat exchanger pipes

Power plant cooling and heating systems

Food & beverage hot water piping

Marine heat transfer systems

Oil & gas refinery heating lines

Pharmaceutical-grade process pipelines

 

Does thermal conductivity affect the performance of 316 stainless steel pipe?

Yes. A stable thermal conductivity (~16 W/m·K) ensures stable and reliable heat transfer performance in equipment such as boilers, reactors, and heat exchangers. Alloy 316 maintains its strength and stability at high temperatures. It can be used intermittently at 870°C and continuously at 925°C.

 

Is the heat transfer performance of SUS316 better than 304?

No, the heat transfer performance of SUS316 and 304 is similar, with no significant difference between them. However, due to its superior corrosion resistance, SUS316 is a better choice for high-temperature applications, especially where corrosion is a significant factor.

Feature	SUS304	SUS316
Thermal Conductivity	~15.0 W/m·K at 20°C	~13.9 W/m·K at 20°C
High-Temperature Performance	Good, but can corrode in continuous use between 425–860°C (797–1580°F)	Maintains strength and corrosion resistance better than 304 at elevated temperatures, especially in corrosive environments

 

What are the temperature limits of SUS316 stainless steel pipe?

The temperature limits of SUS316 stainless steel pipe depend on the specific application and operating conditions, but generally, the maximum temperature for intermittent use is approximately 870°C (1600°F), and the maximum temperature for continuous use is approximately 925°C (1700°F). For applications requiring high strength at temperatures above 500°C (932°F), 316H stainless steel is recommended.

 

What is the price of SUS316 stainless steel pipe per kg today?

Market price generally ranges between $4.20 and $6.20/kg, depending on diameter, thickness, and nickel price trends. Due to nickel price fluctuations, adjustments in shipping costs, and increased demand from overseas projects, the price of SUS316 stainless steel pipe is showing a slight upward trend.

 

Why Choose GNEE as Your SUS316 Stainless Pipe Supplier?

Over 800 tons in stock year-round, ready for immediate shipment.

Complete size range (6–610mm OD, 0.5–30mm thickness).

We offer cutting, bending, polishing, and beveling services.

All products meet ASTM/EN/JIS standards.

We provide EN 10204 3.1/3.2 MTC.

Exporting to 60+ countries (Europe/America/Middle East/Southeast Asia)