MATERIAL DATABASE
Stainless Steel 304L is a low-carbon austenitic stainless steel widely used in industrial equipment, piping systems and fabricated components. It provides good corrosion resistance, formability and improved resistance to sensitization after welding.
Material Overview
A general engineering overview of Stainless Steel 304L and its characteristics for industrial sealing applications.
Stainless Steel 304L is a low-carbon chromium-nickel austenitic stainless steel widely used in industrial equipment, piping systems and fabricated components. It provides a balanced combination of corrosion resistance, mechanical performance and fabrication characteristics.
The lower carbon content distinguishes 304L from standard Type 304 and helps reduce the risk of chromium carbide precipitation during welding. This characteristic can improve resistance to sensitization and intergranular corrosion in welded components under suitable service conditions.
In gasket manufacturing, Stainless Steel 304L may be considered for spiral wound gasket winding elements where corrosion resistance, fabrication characteristics and welded construction requirements are important. Material selection should always consider the complete operating environment, temperature, pressure and chemical compatibility.
Material Properties
Chemical composition, mechanical properties and physical characteristics associated with Stainless Steel 304L.
| Elements | C | Mn | P | S | Si | Cr | Ni | Fe |
|---|---|---|---|---|---|---|---|---|
| Min % | - | - | - | - | - | 18.0 | 8.0 | Balance |
| Max % | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 20.0 | 12.0 | - |
| Property | Typical Value | Unit | Note |
|---|---|---|---|
| Tensile Strength | Minimum approximately 485 | MPa | Typical minimum value |
| Yield Strength | Minimum approximately 170 | MPa | 0.2% offset |
| Elongation | Approximately 40 minimum | % | Typical minimum |
| Hardness | Depends on material condition | HB / HRB | Condition dependent |
| Modulus of Elasticity | Approximately 193 | GPa | Typical value |
| Property | Typical Value / Description |
|---|---|
| Density | Approximately 7.9 – 8.0 g/cm³. |
| Melting Range | Approximately 1400°C to 1455°C. |
| Thermal Conductivity | Moderate thermal conductivity compared with carbon steels. |
| Electrical Resistivity | Higher electrical resistance than many conventional carbon steels. |
Gasket Application
Engineering considerations for using Stainless Steel 304L as a metallic winding material in spiral wound gaskets.
SS304L provides good corrosion resistance in many general industrial environments where service conditions are compatible with austenitic stainless steel.
The reduced carbon content helps minimise sensitization during welding and can improve resistance to intergranular corrosion in appropriate welded applications.
The alloy provides good fabrication and forming characteristics, supporting manufacturing processes used for metallic gasket components.
The material may be considered for industrial piping, process equipment and sealing applications where chemical compatibility and operating conditions are suitable.
Material Specification
Stainless Steel 304L may be used for gasket components depending on component design, applicable standards and service requirements.
| Component | Material | Engineering Consideration |
|---|---|---|
| Spiral Winding Strip | Stainless Steel 304L | Selected according to service compatibility, temperature, pressure and corrosion resistance requirements. |
| Outer Ring | Stainless Steel 304L | May be considered where corrosion resistance and environmental compatibility are suitable. |
| Inner Ring | Stainless Steel 304L | Material selection depends on process media, temperature and applicable gasket design. |
| Material Identification | UNS S30403 | Commonly identified as Type 304L or SS304L. |
Frequently Asked Questions
Common engineering questions related to Stainless Steel 304L.
Stainless Steel 304L is a low-carbon austenitic chromium-nickel stainless steel widely used for industrial equipment, piping systems and fabricated components.
The commonly associated UNS designation for Stainless Steel 304L is UNS S30403.
The primary difference is carbon content. Stainless Steel 304L has a lower maximum carbon content, which helps reduce the risk of sensitization and chromium carbide precipitation during welding.
Yes, Stainless Steel 304L can be considered for spiral wound gasket components where the process environment, temperature, pressure and chemical compatibility are suitable for the material.
Standard Type 304L stainless steel does not normally contain the molybdenum addition associated with Type 316 and Type 316L stainless steels.
Our team can assist with selecting suitable gasket materials based on operating pressure, temperature, chemical environment and application requirements.