304 Stainless Steel Sheet Metal Plate | 0.05mm–3mm Thick | Cut-to-Size Panels

For light shielding, gaskets, or shimming, 0.05–0.3mm (≈0.002"–0.012") is typically sufficient. For structural panels, brackets, or enclosures, 1–3mm (≈0.039"–0.118") is generally recommended. When in doubt, choose a thicker option — it's easier to grind down than to add material back.

Available sizes and approximate inch equivalents:

• 100×100mm ≈ 3.9"×3.9"
• 100×200mm ≈ 3.9"×7.9"
• 200×200mm ≈ 7.9"×7.9"
• 200×300mm ≈ 7.9"×11.8"
• 300×300mm ≈ 11.8"×11.8"
• 300×1000mm ≈ 11.8"×39.4" (available in ultra-thin gauges 0.05–0.5mm)

Select the size closest to your project's cut list to minimize trimming waste.

304 stainless steel offers good corrosion resistance in most outdoor environments and is generally suitable for residential exterior applications. However, in coastal, marine, or high-chloride environments, 316 stainless steel is typically a better choice due to its added molybdenum content. For standard outdoor DIY use — fencing hardware, garden fixtures, HVAC panels — 304 performs well in most US climates.

Yes. 304 stainless steel is weldable using TIG or MIG methods with the appropriate filler wire (ER308L is commonly used). It can be cut with an angle grinder, plasma cutter, or metal shears. Thinner gauges (under 0.5mm) can typically be scored and snapped or cut with heavy-duty scissors. For drilling, use HSS or cobalt drill bits with cutting fluid to extend bit life and prevent work-hardening.

304 stainless steel typically has a tensile strength of around 515 MPa (75,000 psi) and a yield strength of approximately 205 MPa (30,000 psi). Actual load capacity in your application depends on thickness, panel dimensions, edge support conditions, and how the load is applied. For structural calculations, consult an engineer using the specific thickness you select.

Yes. A2 is the ISO 3506 designation for 304-grade stainless steel. Both refer to the same 18/8 chromium-nickel alloy (approximately 18% Cr, 8% Ni). You'll see both terms used interchangeably in hardware, fastener, and sheet metal contexts — they are the same material.

Most panels ship with a 2B mill finish — smooth, flat, and lightly reflective. Some thinner gauges may include a peel-off protective film on one or both faces to prevent scratching during shipping. Contact us to confirm the finish and packaging for your specific size and thickness variant.

Stainless steel provides moderate EMI shielding effectiveness, generally suitable for low-frequency shielding applications. For high-frequency RF shielding, copper or aluminum foil is typically more effective. As a heat shield, 304 stainless steel handles temperatures up to approximately 870°C (1600°F) in intermittent service, making it suitable for exhaust heat shields, fireplace surrounds, and similar applications.