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Stainless Steel 321 Stud Bolts

Stainless Steel 321 Stud Bolts

Stainless steel 321 is an austenitic stainless steel which has been stabilized by the addition of titanium to provide better high temperature strength than the conventional Stainless steel 304 or 316. The addition of titanium in the alloy minimizes the possibility of carbide precipitation and therefore enhances the capacity of the alloy to withstand sensitization during welding. Stainless Steel 321 stud bolts are employed in various high temperature and corrosive atmosphere where stability and strength are required.

Chemical Composition of Stainless Steel 321 Stud Bolts

 The composition of the Stainless Steel 321 Stud Bolts is crucial for understanding their properties and performance in various industrial applications.

GradeCMnSiPSCrNNiTi
SS 3210.08 max2.0 max1.0 max0.045 max0.030 max17.00 - 19.000.10 max9.00 - 12.005(C+N) – 0.70 max

Thus, this table provides valuable insight into the chemical composition of these stud bolts, highlighting their properties and suitability. 

Mechanical Properties of Stainless Steel 321 Stud Bolts

The table provides essential information for engineers and manufacturers to assess the integrity and durability of the Stainless Steel 321 Stud Bolts in demanding environments.

DensityMelting PointTensile StrengthYield Strength (0.2%Offset)Elongation
8.0 g/cm31457 °C (2650 °F)Psi – 75000 , MPa – 515Psi – 30000 , MPa – 20535 %

Thus, this valuable data on the Stainless Steel 321 Stud Bolts' strength, flexibility, and resilience is crucial for ensuring reliability and longevity.

Advantages of Stainless Steel 321 Stud Bolts

These flexible stud bolt fittings offer numerous benefits for various industrial applications.

  • High-Temperature Stability: Stainless Steel 321 is most suitable for the use at temperatures up to about 900°C (1650°F).
  • Corrosion Resistance: The alloy also has excellent resistance to oxidation and general corrosion. It is also chemically resistant to a number of chemicals including sulfuric acid and acetic acid and thus suitable for use in industries.
  • Enhanced Weldability: 321 steel has improved weldability compared to other austenitic grades because of the use of titanium to stabilise the steel to avoid weld decay and ensure that the material has the right mechanical properties.
  • Good Mechanical Properties: The tensile and yield strength of SS 321 at elevated temperatures are found to be fairly reasonable, making the stud bolts produced from this alloy capable of bearing high loads and stresses.
  • Stress-Corrosion Cracking Resistance: This alloy has better stress-corrosion cracking than 304 or 316 stainless steels, and therefore, it can be used in corrosive environments.
  • Ease of Fabrication: SS 321 can be easily worked, is easily machinable and weldable, and can be made in various forms like stud bolts, depending on the requirement.

The Stainless Steel 321 Stud Bolts offer several advantages that make them suitable for industrial and commercial applications.

Common Applications of Stainless Steel 321 Stud Bolts

Due to its excellent features, the Stainless Steel 321 Stud Bolts are preferred in various industrial applications. Some of the main applications include.

  • Aerospace Industry: Stainless Steel 321 is used in the aerospace industry for components exposed to high temperatures, like exhausts and engine parts.
  • Chemical Processing: The alloy is used in chemical processing equipment, including reactors and pipelines, where the material must withstand chemical and high temperature conditions.
  • Power Generation: Stainless Steel 321 is utilised in the power generation industry for parts like boilers, turbines and heat exchangers because of its high temperature and corrosion resistance.
  • Oil and Gas Industry: The alloy, including downhole and refinery parts, is used for high temperatures in the oil and gas industry.
  • Automotive Industry: Stainless Steel 321 is used in automotive applications such as exhaust systems and other high temperature applications in the engine due to the high strength and low coefficient of thermal expansion.
  • Marine Industry: Stainless Steel 321 is less resistant to chloride environment than 316 stainless steel; it is applied in the marine industry where corrosion resistance is moderate, but strength at high temperatures is required.

Stainless Steel 321 Stud Bolts are applied across various industries due to their valuable features, which make them versatile.

Stainless steel 321 is an austenitic stainless steel which has been stabilized by the addition of titanium to provide better high temperature strength than the conventional Stainless steel 304 or 316. The addition of titanium in the alloy minimizes the possibility of carbide precipitation and therefore enhances the capacity of the alloy to withstand sensitization during welding. Stainless Steel 321 stud bolts are employed in various high temperature and corrosive atmosphere where stability and strength are required.

Chemical Composition of Stainless Steel 321 Stud Bolts

 The composition of the Stainless Steel 321 Stud Bolts is crucial for understanding their properties and performance in various industrial applications.

GradeCMnSiPSCrNNiTi
SS 3210.08 max2.0 max1.0 max0.045 max0.030 max17.00 - 19.000.10 max9.00 - 12.005(C+N) – 0.70 max

Thus, this table provides valuable insight into the chemical composition of these stud bolts, highlighting their properties and suitability. 

Mechanical Properties of Stainless Steel 321 Stud Bolts

The table provides essential information for engineers and manufacturers to assess the integrity and durability of the Stainless Steel 321 Stud Bolts in demanding environments.

DensityMelting PointTensile StrengthYield Strength (0.2%Offset)Elongation
8.0 g/cm31457 °C (2650 °F)Psi – 75000 , MPa – 515Psi – 30000 , MPa – 20535 %

Thus, this valuable data on the Stainless Steel 321 Stud Bolts' strength, flexibility, and resilience is crucial for ensuring reliability and longevity.

Advantages of Stainless Steel 321 Stud Bolts

These flexible stud bolt fittings offer numerous benefits for various industrial applications.

  • High-Temperature Stability: Stainless Steel 321 is most suitable for the use at temperatures up to about 900°C (1650°F).
  • Corrosion Resistance: The alloy also has excellent resistance to oxidation and general corrosion. It is also chemically resistant to a number of chemicals including sulfuric acid and acetic acid and thus suitable for use in industries.
  • Enhanced Weldability: 321 steel has improved weldability compared to other austenitic grades because of the use of titanium to stabilise the steel to avoid weld decay and ensure that the material has the right mechanical properties.
  • Good Mechanical Properties: The tensile and yield strength of SS 321 at elevated temperatures are found to be fairly reasonable, making the stud bolts produced from this alloy capable of bearing high loads and stresses.
  • Stress-Corrosion Cracking Resistance: This alloy has better stress-corrosion cracking than 304 or 316 stainless steels, and therefore, it can be used in corrosive environments.
  • Ease of Fabrication: SS 321 can be easily worked, is easily machinable and weldable, and can be made in various forms like stud bolts, depending on the requirement.

The Stainless Steel 321 Stud Bolts offer several advantages that make them suitable for industrial and commercial applications.

Common Applications of Stainless Steel 321 Stud Bolts

Due to its excellent features, the Stainless Steel 321 Stud Bolts are preferred in various industrial applications. Some of the main applications include.

  • Aerospace Industry: Stainless Steel 321 is used in the aerospace industry for components exposed to high temperatures, like exhausts and engine parts.
  • Chemical Processing: The alloy is used in chemical processing equipment, including reactors and pipelines, where the material must withstand chemical and high temperature conditions.
  • Power Generation: Stainless Steel 321 is utilised in the power generation industry for parts like boilers, turbines and heat exchangers because of its high temperature and corrosion resistance.
  • Oil and Gas Industry: The alloy, including downhole and refinery parts, is used for high temperatures in the oil and gas industry.
  • Automotive Industry: Stainless Steel 321 is used in automotive applications such as exhaust systems and other high temperature applications in the engine due to the high strength and low coefficient of thermal expansion.
  • Marine Industry: Stainless Steel 321 is less resistant to chloride environment than 316 stainless steel; it is applied in the marine industry where corrosion resistance is moderate, but strength at high temperatures is required.

Stainless Steel 321 Stud Bolts are applied across various industries due to their valuable features, which make them versatile.

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Stainless Steel 321 Stud Bolts FAQ's  

Stainless Steel 321 Stud Bolts Price Starts At Rs 20/Piece To Rs 30/Piece.

The thread size of Stainless Steel 321 Stud Bolts can vary from 1/4 inch to 2 inches.

Yes, Stainless Steel 321 Stud Bolts are highly resistant to thermal shock thanks to their excellent strength and durability at high temperatures.

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