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Stainless Steel 309S Pipes

Stainless Steel 309S pipe refers to a type of pipe made from stainless steel grade 309S. Stainless steel 309S is an austenitic chromium-nickel stainless steel often used in high-temperature applications. It offers good corrosion resistance, high-temperature strength, and oxidation resistance. The "S" in 309S indicates that it is a low-carbon version of 309 stainless steel. It helps minimize carbide precipitation during welding, making it suitable for welding applications without the risk of intergranular corrosion.

Chemical Composition of Stainless Steel 309S Pipes

Table detailing the chemical composition of Stainless Steel 309S Pipes is essential for understanding their properties.

A312 GRADESUNSCMnPSSiCrNiMoTiNbN
TP309SS309080.082.00.0450.0301.022.0-24.012.0-15.00.75   

The precise composition of stainless steel 309S pipes ensures reliability and performance in various applications.

Mechanical Properties of Stainless Steel 309S Pipes

Table describing mechanical properties of Stainless Steel 309S Pipes, essential for assessing their strength and flexibility.

TypeYield Strength 0.2% offset (KSI)Tensile Strength (KSI)% Elongation (2" Gauge length)Hardness Rockwell
309S Stainless Steel  30 min.75 min.40 min.HRB 95 max.

Stainless Steel 309S Pipes exhibit robust mechanical traits, ensuring durability and reliability in various applications.

Physical Properties of Stainless Steel 309S Pipes

A comprehensive table outlines the physical properties of Stainless Steel 309S Pipes, which is crucial for assessing their thermal and electrical characteristics.

Density (lb./ in^2) @ RT 0.29
Modulus of Elasticity in Tension (psi x 10^6) 29.0
Specific Heat (BTU/o F/lb.)32 to 212 oF0.12
Thermal Conductivity (BTU/hr/ft^2/ft)212oF9.0
 932oF10.8
Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F)32 to 212oF8.3
 32 to 600oF9.3
 32 to 1,000oF9.6
 32 to 1,200oF10.0
Electrical Resistivity (micro ohms – cm)at 70oF39.8
Melting Point Range (oF) 2550 – 2650
Oxidation Resistance – Continuous Service(oF) 2000
Oxidation Resistance – Intermittent Service(oF) 1800

Stainless Steel 309S Pipes display distinct densities, thermal conductivities, and resistance, which are crucial for diverse industrial uses.

Features of Stainless Steel 309S Pipes

Stainless Steel 309S pipes exhibit several features that suit specific applications. Here are some key features of Stainless Steel 309S pipes:

  • High-Temperature Resistance: Stainless Steel 309S is designed to withstand high temperatures, making these pipes suitable for applications in elevated temperature environments, such as heat exchangers and furnace components.
  • Corrosion Resistance: Stainless Steel 309S offers good corrosion resistance, making it suitable for use in corrosive environments, including those exposed to acids, alkalis, and other corrosive substances.
  • Oxidation Resistance: The alloy composition of 309S provides excellent oxidation resistance, making it suitable for applications where exposure to air and high temperatures might lead to oxidation.
  • Low Carbon Content: The "S" in 309S indicates a low carbon content, which helps minimize carbide precipitation during welding. This low-carbon version reduces the risk of intergranular corrosion, making it suitable for welding applications.
  • Weldability: The low carbon content and the presence of stabilizing elements enhance the weldability of Stainless Steel 309S Pipes, allowing for ease of fabrication and welding.
  • Versatility: These pipes find applications in various industries, such as chemical processing, petrochemical, power generation, and thermal processing, showcasing their versatility in different environments.
  • High-Temperature Strength: Stainless Steel 309S Pipe retains its strength at elevated temperatures, making it suitable for applications where structural integrity at high temperatures is crucial.
  • Resistant to Thermal Cycling: The pipes are resistant to thermal cycling, making them suitable for applications involving frequent temperature variations.

Thus, Stainless Steel 309S Pipes are used in various industries sectors.

Applications of Stainless Steel 309S Pipes

Stainless Steel 309S pipes find applications in various industries due to their high-temperature resistance, corrosion resistance, and other beneficial properties. Some common applications include:

  • Heat Exchangers: Stainless Steel 309S pipes are often used to construct heat exchangers where resistance to high temperatures and corrosion is essential.
  • Furnace Parts: Components like furnace tubes and heating elements benefit from the high-temperature strength and oxidation resistance of Stainless Steel 309S Pipes.
  • Chemical Processing: The corrosion resistance of Stainless Steel 309S Pipes makes it suitable for use in chemical processing equipment, including reactors, tanks, and pipelines.
  • Petrochemical Industry: Stainless Steel 309S pipes are employed in the petrochemical industry for various applications, including piping systems and equipment exposed to high temperatures and corrosive environments.
  • Power Generation: In power plants, stainless steel 309S pipes and components are used in high-temperature steam systems and in exhaust gas and boiler systems.
  • Thermal Processing: Industries involved in thermal processing, such as annealing and heat treatment, use 309S pipes for their ability to withstand elevated temperatures and thermal cycling.
  • Aerospace Industry: Some aerospace applications may involve using Stainless Steel 309S pipes where high-temperature resistance and strength are required.
  • Oil and Gas Exploration: Stainless Steel 309S pipes are used in the oil and gas industry, especially in applications where exposure to corrosive environments is a concern.
  • Automotive Exhaust Systems: Due to its resistance to high temperatures and corrosion, 309S stainless steel is used to construct vehicle exhaust systems.
  • Food Processing: In certain food processing applications requiring corrosion resistance, Stainless Steel 309S may be used for pipes and equipment.

It's important to consider the specific properties and requirements of each application, and Stainless Steel 309S pipes may be chosen based on factors such as temperature, corrosion resistance, weldability, and overall durability.

Stainless Steel 309S pipe refers to a type of pipe made from stainless steel grade 309S. Stainless steel 309S is an austenitic chromium-nickel stainless steel often used in high-temperature applications. It offers good corrosion resistance, high-temperature strength, and oxidation resistance. The "S" in 309S indicates that it is a low-carbon version of 309 stainless steel. It helps minimize carbide precipitation during welding, making it suitable for welding applications without the risk of intergranular corrosion.

Chemical Composition of Stainless Steel 309S Pipes

Table detailing the chemical composition of Stainless Steel 309S Pipes is essential for understanding their properties.

A312 GRADESUNSCMnPSSiCrNiMoTiNbN
TP309SS309080.082.00.0450.0301.022.0-24.012.0-15.00.75   

The precise composition of stainless steel 309S pipes ensures reliability and performance in various applications.

Mechanical Properties of Stainless Steel 309S Pipes

Table describing mechanical properties of Stainless Steel 309S Pipes, essential for assessing their strength and flexibility.

TypeYield Strength 0.2% offset (KSI)Tensile Strength (KSI)% Elongation (2" Gauge length)Hardness Rockwell
309S Stainless Steel  30 min.75 min.40 min.HRB 95 max.

Stainless Steel 309S Pipes exhibit robust mechanical traits, ensuring durability and reliability in various applications.

Physical Properties of Stainless Steel 309S Pipes

A comprehensive table outlines the physical properties of Stainless Steel 309S Pipes, which is crucial for assessing their thermal and electrical characteristics.

Density (lb./ in^2) @ RT 0.29
Modulus of Elasticity in Tension (psi x 10^6) 29.0
Specific Heat (BTU/o F/lb.)32 to 212 oF0.12
Thermal Conductivity (BTU/hr/ft^2/ft)212oF9.0
 932oF10.8
Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F)32 to 212oF8.3
 32 to 600oF9.3
 32 to 1,000oF9.6
 32 to 1,200oF10.0
Electrical Resistivity (micro ohms – cm)at 70oF39.8
Melting Point Range (oF) 2550 – 2650
Oxidation Resistance – Continuous Service(oF) 2000
Oxidation Resistance – Intermittent Service(oF) 1800

Stainless Steel 309S Pipes display distinct densities, thermal conductivities, and resistance, which are crucial for diverse industrial uses.

Features of Stainless Steel 309S Pipes

Stainless Steel 309S pipes exhibit several features that suit specific applications. Here are some key features of Stainless Steel 309S pipes:

  • High-Temperature Resistance: Stainless Steel 309S is designed to withstand high temperatures, making these pipes suitable for applications in elevated temperature environments, such as heat exchangers and furnace components.
  • Corrosion Resistance: Stainless Steel 309S offers good corrosion resistance, making it suitable for use in corrosive environments, including those exposed to acids, alkalis, and other corrosive substances.
  • Oxidation Resistance: The alloy composition of 309S provides excellent oxidation resistance, making it suitable for applications where exposure to air and high temperatures might lead to oxidation.
  • Low Carbon Content: The "S" in 309S indicates a low carbon content, which helps minimize carbide precipitation during welding. This low-carbon version reduces the risk of intergranular corrosion, making it suitable for welding applications.
  • Weldability: The low carbon content and the presence of stabilizing elements enhance the weldability of Stainless Steel 309S Pipes, allowing for ease of fabrication and welding.
  • Versatility: These pipes find applications in various industries, such as chemical processing, petrochemical, power generation, and thermal processing, showcasing their versatility in different environments.
  • High-Temperature Strength: Stainless Steel 309S Pipe retains its strength at elevated temperatures, making it suitable for applications where structural integrity at high temperatures is crucial.
  • Resistant to Thermal Cycling: The pipes are resistant to thermal cycling, making them suitable for applications involving frequent temperature variations.

Thus, Stainless Steel 309S Pipes are used in various industries sectors.

Applications of Stainless Steel 309S Pipes

Stainless Steel 309S pipes find applications in various industries due to their high-temperature resistance, corrosion resistance, and other beneficial properties. Some common applications include:

  • Heat Exchangers: Stainless Steel 309S pipes are often used to construct heat exchangers where resistance to high temperatures and corrosion is essential.
  • Furnace Parts: Components like furnace tubes and heating elements benefit from the high-temperature strength and oxidation resistance of Stainless Steel 309S Pipes.
  • Chemical Processing: The corrosion resistance of Stainless Steel 309S Pipes makes it suitable for use in chemical processing equipment, including reactors, tanks, and pipelines.
  • Petrochemical Industry: Stainless Steel 309S pipes are employed in the petrochemical industry for various applications, including piping systems and equipment exposed to high temperatures and corrosive environments.
  • Power Generation: In power plants, stainless steel 309S pipes and components are used in high-temperature steam systems and in exhaust gas and boiler systems.
  • Thermal Processing: Industries involved in thermal processing, such as annealing and heat treatment, use 309S pipes for their ability to withstand elevated temperatures and thermal cycling.
  • Aerospace Industry: Some aerospace applications may involve using Stainless Steel 309S pipes where high-temperature resistance and strength are required.
  • Oil and Gas Exploration: Stainless Steel 309S pipes are used in the oil and gas industry, especially in applications where exposure to corrosive environments is a concern.
  • Automotive Exhaust Systems: Due to its resistance to high temperatures and corrosion, 309S stainless steel is used to construct vehicle exhaust systems.
  • Food Processing: In certain food processing applications requiring corrosion resistance, Stainless Steel 309S may be used for pipes and equipment.

It's important to consider the specific properties and requirements of each application, and Stainless Steel 309S pipes may be chosen based on factors such as temperature, corrosion resistance, weldability, and overall durability.

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Stainless Steel 309S Pipes FAQ's  

The Price Range For Stainless Steel 309S Pipes Products Is ₹200 To ₹350 Per Kilogram.

Stainless Steel 309S pipes have a number of notable uses due to their resistance to corrosion, high temperature, and stress. These qualities make them suitable for use in many industries such as food processing, petrochemical production, oil refineries and power generation.

Yes, they are non-magnetic and highly resistant to scaling at high temperatures which makes them an ideal choice for heat exchangers or boiler tubes.

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