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Stainless Steel 309H Pipes

309H stainless steel pipes are made from the high-temperature resistant alloy known as 309H. They have 25-28% chromium, 24-26% nickel, and 0.04- 0.08% carbon. Other elements, such as silicon, copper, and manganese, may also be present in smaller quantities. This is a modified version of standard grade 309, specifically designed for use in high-temperature applications. These specialized pipes are developed to withstand harsh operating conditions and high temperatures while retaining outstanding corrosion resistance. This material is chosen in cases where the standard grades of stainless steel do not perform satisfactorily under increased temperatures.

Chemical Composition of Stainless Steel 309H Pipes

Comprehensive table highlights the precise chemical Composition of Stainless Steel 309H Pipes, vital for understanding their properties.

Grade

C

Mn

Si

P

S

Cr

Fe

Ni

309H

0.04-0.10

2

0.75

0.045

0.03

22-24

58-63

12-15

The chemical composition of SS 309H Pipes ensures optimal performance and durability for various industrial applications.

Mechanical Properties of Stainless Steel 309H Pipes

Understanding the mechanical strength of Stainless Steel 309H Pipes is essential for assessing their suitability in applications.

Grade

Tensile Str

(MPa) min

Yield Str

0.2% Proof (MPa) min

Elong

(% in 50mm) min

Hardness

Rockwell B (HR B) max

Brinell (HB) max

309H

515

205

40

95

217

309H Stainless Steel Pipes exhibit high tensile strength, yield strength, and elongation, ensuring reliability.

Advantages of Stainless Steel 309H Pipes:

Stainless Steel 309H pipes are integral components in various industrial applications, renowned for their exceptional properties and strong construction. Here are some key benefits:

  • High Chromium and Nickel Content: The material used in this product has high chromium and nickel content, giving it exceptional oxidation and corrosion resistance, especially at high temperatures.
  • Heat Resistance: Stainless steel's incredible resistance to high temperatures makes it ideal for applications involving long exposure to extreme heat. It retains its strength and oxidation resistance at temperatures up to 2000°F (1093°C).
  • High Carbon Content: In comparison to standard grade 309 stainless steel, the “H” in 309H implies higher carbon content. High carbon content improves creep strength and sensitization resistance which are critical for temperatures above hundreds of degrees Celsius.
  • Excellent Weldability: There is good weldability with stainless steel type 309H by using conventional welding methods that can be performed on it without much difficulty, including low input heat during welding, which helps avoid intergranular attack or sensitization risk when joining these metals together.
  • Corrosion Resistance: Stainless Steel Type, however, can withstand rusting due to other gases that contain sulphur while also being exposed to other harsh chemicals. For example, thermal oxide scales usually grow linearly with time at a rate proportional to T^3 according to the oxidation kinetics relationship.
    SS 309H pipes offer various benefits that make them indispensable in industrial applications. Their unique combination of properties ensures reliability and longevity, making them a preferred choice across various sectors.

Applications of SS 309H Pipes:

Stainless Steel 309H pipes are widely used in diverse industrial applications due to their exceptional properties. Some common uses of 309H Stainless Steel Pipes include:

  • Furnace Components: Radiant tubes, muffles, retorts and heating elements are the major furnace components made from stainless steel 309H pipes due to its high melting point without signs of deformation or oxidation.
  • Heat Treatment Equipment: Due to its ability to resist oxidation, scaling at high temperatures SS 309H Pipes is often employed in equipment used in heat treatment processes like annealing, tempering and quenching. One example is fixtures used for holding metals from heat treatment operations like trays baskets racks.
  • Chemical Processing: Stainless steel 309H pipes is commonly used for constructing equipment and piping systems operating at elevated temperatures handling corrosive chemicals in the chemical processing industry, including reactors, distillation columns, and heat exchangers, among others, are used extensively by petrochemical refineries, or pharmaceutical companies requiring chemical synthesis.
  • Power Generation Applications: For power generation applications, stainless steel 309H pipes is applicable in facilities exposed to elevated temperature and aggressive environments, such as boiler tubes, super heaters, and reheaters used in fossil fuel-fired power plants and nuclear power plants.
  • Aircraft and Automotive Exhaust Systems: This feature allows 309H stainless steel pipes to be commonly used in the exhaust systems of aircrafts, automobiles and other vehicles that need high temperature resistance as it can withstand higher temperatures caused by corrosive gases emitted during engine operation without any degradation.
  • Pulp & Paper Mill Industry: Such cases include bleaching towers digesters evaporators etc where there is a requirement for resistance against high temperature and corrosive chemicals among others. Stainless steel 309H pipes can be found in pulp & paper industry equipment including recovery boilers.

Stainless Steel 309H pipes play a crucial role in various industries as they are not only essential for their functional properties but also contribute to the safety, cleanliness, and efficiency of industrial processes across different sectors.

309H stainless steel pipes are made from the high-temperature resistant alloy known as 309H. They have 25-28% chromium, 24-26% nickel, and 0.04- 0.08% carbon. Other elements, such as silicon, copper, and manganese, may also be present in smaller quantities. This is a modified version of standard grade 309, specifically designed for use in high-temperature applications. These specialized pipes are developed to withstand harsh operating conditions and high temperatures while retaining outstanding corrosion resistance. This material is chosen in cases where the standard grades of stainless steel do not perform satisfactorily under increased temperatures.

Chemical Composition of Stainless Steel 309H Pipes

Comprehensive table highlights the precise chemical Composition of Stainless Steel 309H Pipes, vital for understanding their properties.

Grade

C

Mn

Si

P

S

Cr

Fe

Ni

309H

0.04-0.10

2

0.75

0.045

0.03

22-24

58-63

12-15

The chemical composition of SS 309H Pipes ensures optimal performance and durability for various industrial applications.

Mechanical Properties of Stainless Steel 309H Pipes

Understanding the mechanical strength of Stainless Steel 309H Pipes is essential for assessing their suitability in applications.

Grade

Tensile Str

(MPa) min

Yield Str

0.2% Proof (MPa) min

Elong

(% in 50mm) min

Hardness

Rockwell B (HR B) max

Brinell (HB) max

309H

515

205

40

95

217

309H Stainless Steel Pipes exhibit high tensile strength, yield strength, and elongation, ensuring reliability.

Advantages of Stainless Steel 309H Pipes:

Stainless Steel 309H pipes are integral components in various industrial applications, renowned for their exceptional properties and strong construction. Here are some key benefits:

  • High Chromium and Nickel Content: The material used in this product has high chromium and nickel content, giving it exceptional oxidation and corrosion resistance, especially at high temperatures.
  • Heat Resistance: Stainless steel's incredible resistance to high temperatures makes it ideal for applications involving long exposure to extreme heat. It retains its strength and oxidation resistance at temperatures up to 2000°F (1093°C).
  • High Carbon Content: In comparison to standard grade 309 stainless steel, the “H” in 309H implies higher carbon content. High carbon content improves creep strength and sensitization resistance which are critical for temperatures above hundreds of degrees Celsius.
  • Excellent Weldability: There is good weldability with stainless steel type 309H by using conventional welding methods that can be performed on it without much difficulty, including low input heat during welding, which helps avoid intergranular attack or sensitization risk when joining these metals together.
  • Corrosion Resistance: Stainless Steel Type, however, can withstand rusting due to other gases that contain sulphur while also being exposed to other harsh chemicals. For example, thermal oxide scales usually grow linearly with time at a rate proportional to T^3 according to the oxidation kinetics relationship.
    SS 309H pipes offer various benefits that make them indispensable in industrial applications. Their unique combination of properties ensures reliability and longevity, making them a preferred choice across various sectors.

Applications of SS 309H Pipes:

Stainless Steel 309H pipes are widely used in diverse industrial applications due to their exceptional properties. Some common uses of 309H Stainless Steel Pipes include:

  • Furnace Components: Radiant tubes, muffles, retorts and heating elements are the major furnace components made from stainless steel 309H pipes due to its high melting point without signs of deformation or oxidation.
  • Heat Treatment Equipment: Due to its ability to resist oxidation, scaling at high temperatures SS 309H Pipes is often employed in equipment used in heat treatment processes like annealing, tempering and quenching. One example is fixtures used for holding metals from heat treatment operations like trays baskets racks.
  • Chemical Processing: Stainless steel 309H pipes is commonly used for constructing equipment and piping systems operating at elevated temperatures handling corrosive chemicals in the chemical processing industry, including reactors, distillation columns, and heat exchangers, among others, are used extensively by petrochemical refineries, or pharmaceutical companies requiring chemical synthesis.
  • Power Generation Applications: For power generation applications, stainless steel 309H pipes is applicable in facilities exposed to elevated temperature and aggressive environments, such as boiler tubes, super heaters, and reheaters used in fossil fuel-fired power plants and nuclear power plants.
  • Aircraft and Automotive Exhaust Systems: This feature allows 309H stainless steel pipes to be commonly used in the exhaust systems of aircrafts, automobiles and other vehicles that need high temperature resistance as it can withstand higher temperatures caused by corrosive gases emitted during engine operation without any degradation.
  • Pulp & Paper Mill Industry: Such cases include bleaching towers digesters evaporators etc where there is a requirement for resistance against high temperature and corrosive chemicals among others. Stainless steel 309H pipes can be found in pulp & paper industry equipment including recovery boilers.

Stainless Steel 309H pipes play a crucial role in various industries as they are not only essential for their functional properties but also contribute to the safety, cleanliness, and efficiency of industrial processes across different sectors.

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Stainless Steel 309H Pipes FAQ's  

The Price Range For Stainless Steel 309H Pipes Products Is ₹230 To ₹300 Per Kilogram.

309H stainless steel pipes can be used for many applications, including boiler tubing, heat exchangers, mechanical components – particularly valves and pumps – steam superheater tubes, pressure piping, fuel lines and other components.

Compared to 304/304L/304H stainless steel pipes, 309H has a higher chromium and nickel content which gives it higher corrosion resistance and strength. It also has better temperature resistance since it has a lower carbon content. 

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