Foil Grade & Band Selector

Service temperature, chloride exposure and forming severity decide the grade. Thickness decides what actually governs acceptance.

Peak service temperature

Chloride or acid exposure

Forming severity

Thickness (mm)

Magnetic response

Recommended Grade

304

Nothing in the duty pushes past the balanced default. The balanced default: forming, welding and general corrosion resistance in one grade.

Nickel-lean austenitic. Work-hardens faster than 304 and costs less, best kept to dry indoor duty.

Low-carbon 304. Resists sensitization after welding, so it suits welded thin assemblies.

At 0.100 mm only four to nine grains span the thickness, so temper and grain condition govern acceptance more than the tolerance figure.

Nickel-lean austenitic. Work-hardens faster than 304 and costs less, best kept to dry indoor duty.

Austenitic that takes spring temper after cold rolling. The default where the part has to return.

The balanced default: forming, welding and general corrosion resistance in one grade.

Low-carbon 304. Resists sensitization after welding, so it suits welded thin assemblies.

Molybdenum-bearing. Raises chloride pitting and crevice resistance well above 304.

Titanium-stabilized against carbide precipitation. The standard heat treating tool wrap to 1093 °C.

Higher chromium and nickel for hot service. Tool wrap and furnace parts to 1227 °C.

Sustained high-temperature oxidation resistance for radiant tubes, baffles and heat shields.

Ferritic and magnetic with low nickel content. Appliance panels and magnetic shield layers.

Duplex. Roughly twice the yield strength of 304 with strong chloride cracking resistance.