Stainless steel is an incredibly versatile material used across various industries and applications, from food processing and medical equipment to construction and transportation. 304 stainless steel sheet, in particular, is a popular choice for its corrosion resistance, durability, and aesthetic appeal. One of the critical factors to consider when selecting a stainless steel sheet is its thickness, which can affect its strength, appearance, and suitability for specific uses.
In this post, we will explore the thickness of 304 stainless steel sheets in detail, covering their standard sizes, thickness tolerance, and applications.
304 Stainless Steel Thickness: Quick Answer
304 stainless steel sheet is available in a wide range of thicknesses. Common sheet thicknesses used for industrial applications typically range from about 0.4 mm to 6 mm, while thicker material is generally supplied and specified as plate.
For purchasing, always specify the required nominal thickness, width, length, surface finish, tolerance and applicable standard rather than relying on gauge alone.
304 Stainless Steel Thickness Chart
The following chart shows commonly specified 304 stainless steel sheet thicknesses in millimeters and inches. Actual availability and tolerance depend on the mill, product form and applicable specification.
| Thickness (mm) | Thickness (inch) | Typical Use |
|---|---|---|
| 0.4 mm | 0.0157 in | Light fabrication and decorative components |
| 0.5 mm | 0.0197 in | Light sheet applications |
| 0.8 mm | 0.0315 in | Panels, enclosures and formed parts |
| 1.0 mm | 0.0394 in | General fabrication |
| 1.5 mm | 0.0591 in | Food equipment and industrial fabrication |
| 2.0 mm | 0.0787 in | Tanks and equipment parts |
| 3.0 mm | 0.1181 in | Heavy fabrication |
| 4.0 mm | 0.1575 in | Industrial structures |
| 5.0 mm | 0.1969 in | Heavy-duty equipment |
| 6.0 mm | 0.2362 in | Heavy fabrication / plate applications |
304 Stainless Steel Gauge Thickness Chart
Gauge numbers are commonly used for stainless steel sheet in some markets. Because gauge is not a universal thickness unit, buyers should also specify the decimal thickness in millimeters or inches when ordering.
| Stainless Gauge | Approx. Inches | Approx. mm |
|---|---|---|
| 10 gauge | 0.1406 in | 3.57 mm |
| 12 gauge | 0.1094 in | 2.78 mm |
| 14 gauge | 0.0781 in | 1.98 mm |
| 16 gauge | 0.0625 in | 1.59 mm |
| 18 gauge | 0.0500 in | 1.27 mm |
| 20 gauge | 0.0375 in | 0.95 mm |
| 22 gauge | 0.0313 in | 0.79 mm |
| 24 gauge | 0.0250 in | 0.64 mm |
Gauge values are nominal reference values. For purchasing and fabrication, confirm the required decimal thickness with the supplier.
Standard Sizes of 304 Stainless Steel Sheet
304 stainless steel sheet is available in a wide range of thicknesses, from ultra-thin sheets measuring as little as 0.4mm to thick plates up to 150mm thick. However, several standard sizes are commonly used in various industries and applications.
The most common sizes for 304 stainless steel sheets are:
- 1000mm x 2000mm
- 1219mm x 2438mm
- 1250mm x 2500mm
- 1500mm x 3000mm
Other sizes are available upon request. We can provide custom cutting services and processes according to customers’ requirements.
304 Stainless Steel Sheet Thickness Tolerance
Thickness tolerance for 304 stainless steel sheet is not determined by grade alone. The permitted variation depends on the applicable product specification, nominal thickness, product width, ordered dimensions and measurement system.
ASTM A240/A240M covers chromium and chromium-nickel stainless steel plate, sheet and strip for pressure vessels and general applications. ASTM A480/A480M provides general requirements for flat-rolled stainless steel products, including dimensional requirements and tolerances.
For purchasing, specify the required standard, nominal thickness, width and length on the purchase order. If your project requires tighter-than-standard thickness tolerances, confirm these requirements with the supplier before production.
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Applications of 304 Stainless Steel Sheets by Thickness
The thickness of 304 stainless steel sheets can significantly impact their suitability for different applications. Here are some examples of how the thickness of 304 stainless steel sheet is commonly used across various industries:
（1） Thin sheets (less than 0.6mm):
Thin sheets of 304 stainless steel are commonly used in the electronics industry to make connectors, sensors, and switches. They are also used in the automotive industry for making exhaust systems, mufflers, and catalytic converters.
（2） Medium sheets (0.6mm to 3.0mm):
Medium-thickness 304 stainless steel sheets are commonly used in the construction industry for roofing, cladding, wall panels, and structural components. They are also used in the food and beverage industry for making tanks, piping, and processing equipment.
（3） Thick sheets (more than 3.0mm):
Thick sheets of 304 stainless steel are commonly used in the aerospace industry for making aircraft components such as engine parts, landing gear, and structural components. They are also used in the oil and gas industry for making pressure vessels, pipelines, and storage tanks.
We use 304 in various industries because of its excellent performance and versatility. The thickness of the sheet determines its specific applications, and choosing the right consistency is crucial for ensuring the optimal performance of the material in a given application.