What is SUS Grade?

“SUS” stands for “Steel Use Stainless” and is a name used in Japan to denote grades of stainless steel that adhere to the Japanese Industrial Standards (JIS). SUS grades are a type of stainless steel that specifies varied compositions and properties, usually related to corrosion resistance, mechanical strength, and various uses.

SUS 304 Stainless Steel:

• Composition: SUS 304 is a grade of stainless steel that primarily contains chromium (18-20%) and nickel (8-10.5%). It is part of the austenitic family of stainless steels.
• Properties:
  • Corrosion Resistance: SUS 304 offers excellent resistance to corrosion, especially in atmospheric and mildly corrosive environments.
  • Mechanical Strength: It has good mechanical properties and can maintain its strength at high temperatures.
  • Formability and Weldability: SUS 304 is easily formed and welded, making it suitable for a wide range of applications.
• Applications: Commonly used in kitchen equipment, food processing, chemical containers, and architectural applications.

SUS 304L Stainless Steel:

• Composition: Similar to SUS 304, SUS 304L contains lower carbon content (maximum 0.03%) compared to SUS 304 (maximum 0.08%). This slight difference in carbon content gives it distinct properties.
• Properties:
  • Improved Weldability: The lower carbon content reduces the risk of carbide precipitation during welding, which can lead to corrosion at welded joints (also known as intergranular corrosion).
  • Corrosion Resistance: SUS 304L offers excellent corrosion resistance, similar to SUS 304, but with enhanced performance in welding applications.
  • Mechanical Properties: While slightly lower in strength compared to SUS 304 due to its lower carbon content, SUS 304L still offers good mechanical properties and toughness.
• Applications: Often used in welded components, particularly in chemical and petrochemical industries, and in situations where post-weld heat treatment is not possible.

Key Difference:

• Carbon Content: SUS 304L has lower carbon content than SUS 304.
• Use in Welding: SUS 304L is preferred for welding applications to prevent intergranular corrosion without the need for post-weld annealing.

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Chemical Composition

• Nickel (Ni): 58.0% min
• Chromium (Cr): 20.0-23.0%
• Molybdenum (Mo): 8.0-10.0%
• Iron (Fe): Balance
• Niobium (Nb) + Tantalum (Ta): 3.15-4.15%
• Manganese (Mn): 0.5% max
• Silicon (Si): 0.5% max
• Carbon (C): 0.1% max
• Sulfur (S): 0.015% max
• Aluminum (Al): 0.4% max
• Titanium (Ti): 0.4% max
• Cobalt (Co): 1.0% max

Mechanical Properties

• Tensile Strength: 827 MPa min
• Yield Strength (0.2% offset): 414 MPa min
• Elongation: 30% min
• Hardness: Rockwell B (HRB) 100 max

Physical Properties

• Density: 8.44 g/cm³
• Melting Point: 1290-1350°C
• Thermal Conductivity: 9.8 W/m·K at 20°C
• Coefficient of Thermal Expansion: 12.8 µm/m·°C (20-100°C)

Standards and Specifications

• ASTM: B446, B443, B444, B704
• ASME: SB446, SB443, SB444, SB704
• DIN: 17752, 17750, 17751, 17754

Typical Applications

• Aerospace: for turbine blades, seals, and exhaust systems.
• Marine: for seawater components and offshore platforms.
• Chemical processing: for heat exchangers, reactor vessels, and columns.
• Nuclear industry: for reactor cores and control rod components.

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Here are some key characteristics of a stainless steel 316L plug gasket:

Material Composition: Stainless steel 316L primarily consists of iron, chromium (16-18%), nickel (10-14%), molybdenum (2-3%), and small amounts of other elements such as manganese, silicon, carbon, sulfur, and phosphorus. The low carbon content (typically less than 0.03%) in 316L minimizes carbide precipitation during welding, making it suitable for applications where welding is involved.

Corrosion Resistance: Stainless steel 316L offers excellent corrosion resistance in a wide range of corrosive environments, including acidic, alkaline, and chloride-rich environments. This corrosion resistance makes it ideal for use in industries such as chemical processing, marine, pharmaceutical, and food processing.

Temperature Resistance: 316L stainless steel exhibits good resistance to high temperatures, making it suitable for applications involving elevated temperatures. However, its temperature resistance is lower compared to some other stainless steel alloys, such as 316H or 317L, which have higher carbon or molybdenum content, respectively.

Sealing Properties: As a material for plug gaskets, stainless steel 316L provides reliable sealing properties, effectively preventing leakage of fluids or gases between mating surfaces, such as flanges or pipes. The gasket’s design and construction ensure a tight seal even under high pressure and temperature conditions.

Weldability: Stainless steel 316L is highly weldable using common welding techniques, such as TIG (tungsten inert gas) welding, MIG (metal inert gas) welding, and SMAW (shielded metal arc welding). The low carbon content minimizes the risk of sensitization and intergranular corrosion during welding, ensuring the integrity of the weld joint.

Mechanical Properties: Stainless steel 316L exhibits good mechanical properties, including high tensile strength, excellent formability, and good toughness. These properties contribute to the durability and reliability of plug gaskets made from this material.

Overall, stainless steel 316L plug gaskets offer a combination of corrosion resistance, temperature resistance, weldability, and mechanical properties, making them suitable for a wide range of industrial sealing applications.

We maintain ready stock of Stainless Steel 316L Plug Gasket. Get in touch with us with your requirement for quick quote.

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Material Composition: The main constituents of SS 304L are iron, nickel (about 8–12%), and chromium (usually between 18 and 20%). It also has trace levels of silicon, carbon, sulphur, phosphorus, nitrogen, and manganese. Because 304L has a low carbon content—typically less than 0.03%—it helps reduce carbide precipitation during welding, which makes it appropriate for use in applications requiring corrosion resistance and welded structures.

Corrosion Resistance: SS 304L, like other grades of stainless steel, provides exceptional resistance to corrosion, especially in conditions where exposure to moisture, acids, alkalis, and chlorides is possible. It can be used in headers, heat exchangers, and other processing equipment, among other industrial applications, because of its resistance to corrosion.

Temperature Resistance: Heat exchangers, boilers, exhaust systems, and other applications involving elevated temperatures are suited for stainless steel 304L due to its good resistance to high temperatures. Its maximal temperature resistance is, however, less than that of higher grade stainless steels, such as 316 or 321.

Weldability: TIG (tungsten inert gas), MIG (metal inert gas), and SMAW (shielded metal arc welding) are just a few of the typical welding processes that can be used to join SS 304L. Because of the low carbon content, there is less chance of carbide precipitation and sensitization during welding, which can happen with higher carbon stainless steels.

Mechanical features: High tensile strength, outstanding yield strength, and exceptional ductility are only a few of the good mechanical features of stainless steel 304L. Because of these characteristics, it can be used in the forming and machining procedures needed to produce header plugs with complex geometries and shapes.

Overall, SS 304L header plugs provide a combination of mechanical qualities, temperature resistance, corrosion resistance, and weldability, which qualifies them for usage in a range of industrial applications requiring dependable corrosion resistance and sealing.

We maintain ready stock of Stainless Steel 304 Header Plugs. Get in touch with us with your requirement for quick quote.

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A plug gasket made from Inconel 800H or 800HT would utilize these alloy materials to provide superior sealing properties in high-temperature and high-pressure applications. Here’s an overview of the characteristics of Inconel 800H and 800HT and why they are suitable for plug gasket applications:

1. High Temperature Resistance: Both Inconel 800H and 800HT offer excellent resistance to high temperatures. Inconel 800H is specifically designed for high-temperature applications up to approximately 1100°C (2000°F), while Inconel 800HT is engineered for even higher temperatures, with a maximum service temperature of approximately 1200°C (2200°F). This high-temperature resistance ensures that the plug gasket maintains its integrity and sealing properties even in extremely hot environments.
   
2. Corrosion Resistance: Inconel 800H and 800HT exhibit outstanding resistance to oxidation and carburization at elevated temperatures, as well as resistance to corrosion by various aqueous environments. This corrosion resistance makes them suitable for use in environments where corrosive gases or liquids may be present, ensuring long-term reliability of the plug gasket.
   
3. Mechanical Properties: Inconel 800H and 800HT possess good mechanical properties, including high strength, excellent creep resistance, and adequate ductility. These properties contribute to the reliability and durability of the plug gasket, allowing it to withstand mechanical stresses and pressure fluctuations without failure.
   
4. Weldability: Both alloys are readily weldable using conventional welding techniques, allowing for the fabrication of complex shapes and configurations of plug gaskets.
   
5. Thermal Expansion: Inconel 800H and 800HT have relatively low coefficients of thermal expansion, which helps minimize dimensional changes and ensures tight sealing under thermal cycling conditions.
   
   Overall, plug gaskets made from Inconel 800H or 800HT offer exceptional performance in high-temperature, high-pressure, and corrosive environments, making them suitable for critical sealing applications in various industries.
   

We maintain ready stock of Stainless Steel 304 Plug Gasket. Get in touch with us with your requirement for quick quote.

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1. Plug gaskets made from Nickel 200 are often used in high-temperature and high-pressure applications, such as in chemical processing plants, petrochemical refineries, power generation facilities, and aerospace industries. These gaskets are designed to provide a reliable seal between mating surfaces, such as flanges or pipes, preventing leakage of fluids or gases.
   
2. The choice of Nickel 200 for plug gaskets is primarily due to its exceptional resistance to corrosion and oxidation, even at elevated temperatures. This makes it suitable for use in harsh operating conditions where other materials might fail prematurely. Additionally, Nickel 200 exhibits good mechanical properties, including high strength and ductility, which contribute to the overall performance and longevity of the plug gaskets.
   
3. Overall, Nickel 200 plug gaskets offer reliability, durability, and resistance to corrosion, making them a preferred choice for demanding industrial applications where sealing performance is critical.

We maintain ready stock of Nickel 200 Plug Gasket. Get in touch with us with your requirement for quick quote.

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1. Oil and Gas Industry: In oil drilling and production equipment, Monel 400 plug gaskets are utilised because of their exceptional resistance to corrosive fluids such as brine and seawater that are encountered during offshore drilling operations.
   
2. Chemical Processing: Monel 400 plug gaskets are also employed in chemical processing plants where they come into contact with corrosive chemicals and acids.
   
3. Marine Applications: Due to its excellent resistance to seawater corrosion, Monel 400 plug gaskets find applications in marine equipment and shipbuilding.
   
4. Chemical Compatibility: It exhibits good chemical resistance to a variety of corrosive substances, including acids, alkalis, and solvents. This makes the gasket suitable for use in industries such as chemical processing, oil and gas, and petrochemicals.
   
5. Power Generation: These gaskets are also used in power generation facilities, especially in parts where exposure to high temperatures and corrosive environments is a concern.
   
6. Aerospace Industry: Monel 400 plug gaskets can be used in aerospace applications where resistance to high temperatures and corrosive environments is required.
   
7. These plug gaskets are designed to provide a reliable seal in various pressure and temperature conditions, making them suitable for a wide range of industrial applications. They are available in various sizes and configurations to fit different types of plugs and valves. When installing Monel 400 plug gaskets, it’s essential to follow proper installation procedures to ensure a tight and leak-free seal.
   

We maintain ready stock of Monel 400 Plug Gasket. Get in touch with us with your requirement for quick quote.

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The stainless steel 321 plug gasket is made to offer a dependable seal between two components, much like the stainless steel 316 plug gasket. It is frequently used in processes involving excessive temperatures, such as exhaust systems, heat exchangers, and other industrial operations, where high temperature and corrosion resistance are necessary.

1. Heat resistance: Stainless steel 321 is specifically designed to withstand high temperatures, making it suitable for applications where thermal cycling and exposure to extreme heat are common.
   
2. Corrosion resistance: The titanium addition in stainless steel 321 improves its resistance to intergranular corrosion and other forms of corrosion, making it well-suited for applications involving corrosive environments.
   
3. Strength and durability: Stainless steel 321 is a strong and durable material, ensuring the gasket can withstand pressure and maintain its sealing properties over an extended period.
   
   It is essential to take into account the particular requirements of the application, such as the operating temperature, pressure, and nature of the fluids or gases being sealed, while choosing a stainless steel 321 plug gasket. To create a strong and reliable seal, this information will be used to choose the right size, shape, and design for the gasket.
   

We maintain ready stock of Stainless Steel 321 Plug Gasket. Get in touch with us with your requirement for quick quote.

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The plug gasket normally has a hole in the center that allows it to fit around a plug or other similar object. It is typically made in a round or rectangular shape. It is frequently used in industrial applications that call for a dependable seal, such as plumbing, piping systems, hydraulic fittings, and others.

The strong chemical resistance of UNS S31600 plug gaskets makes them appropriate for use in situations involving corrosive fluids or gases. Additionally, they can tolerate high pressure and temperatures, guaranteeing a solid seal.

It is crucial to take into account the particular requirements of the application, such as the operating conditions, pressure, temperature, and the medium being sealed, while choosing a plug gasket. To ensure a strong seal and top performance, these variables will aid in choosing the right gasket’s size, shape, and material.

We maintain ready stock of Stainless Steel 316 Plug Gasket. Get in touch with us with your requirement for quick quote.

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1. Material: The gasket is made from Stainless Steel 304, which is a widely used austenitic stainless steel alloy known for its excellent corrosion resistance, durability, and mechanical properties.
   
2. Sealing Function: The plug gasket is designed to create a tight seal between two surfaces, preventing the leakage of fluids or gases. It acts as a barrier, ensuring a secure and reliable connection.
   
3. Temperature and Pressure Resistance: Stainless Steel 304 is capable of withstanding high temperatures and pressures, making it suitable for a wide range of industrial applications. The gasket maintains its integrity even in demanding operating conditions.
   
4. Chemical Compatibility: It exhibits good chemical resistance to a variety of corrosive substances, including acids, alkalis, and solvents. This makes the gasket suitable for use in industries such as chemical processing, oil and gas, and petrochemicals.
   
5. Versatility: The Stainless Steel 304 Plug Gasket is compatible with different flange designs, including raised face and flat face flanges. It can be used in various industries, including pipelines, valves, pumps, and pressure vessels.
   
6. Easy Installation and Replacement: The gasket is designed for easy installation, allowing for quick and hassle-free assembly. It can also be easily replaced during maintenance or repairs, minimizing downtime.
   
7. Longevity and Cost-Effectiveness: Stainless Steel 304 offers excellent durability and longevity, reducing the need for frequent gasket replacements. This contributes to cost savings in terms of maintenance and downtime.
   
8. Hygienic Applications: The gasket material is hygienic and suitable for applications where cleanliness is essential, such as food processing, pharmaceuticals, and medical devices.
   

We maintain ready stock of Stainless Steel 304 Plug Gasket. Get in touch with us with your requirement for quick quote.

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