Clad metal for pots, pans and cookware bodies
Cookware manufacturing is a forming business. The material has to draw without thinning out of tolerance, hold a flat base after the press, and keep its bond through the thermal cycles of cooking. Each cookware type stresses those three differently.
At a glance
Specification at a glance
| Cookware | Typical structure | What to send |
|---|---|---|
| Wok | 3-ply, 304 + 1050 + 430 | Drawing with draw depth and base diameter |
| Soup or stock pot | 3-ply, heavier gauge | Diameter, height, rim detail |
| Milk pot | 3-ply, thinner gauge | Diameter and target weight |
| Hot pot | 3-ply, patterned face | Pattern sample and pattern area |
| Pressure cooker | 3-ply body | Design and applicable standard |
| Rice cooker liner | 3-ply, deep draw disc | Drawing and disc diameter |
Woks and frying pans
A wok is the hardest draw in the range. The blank is large, the wall is thin, and the base has to stay flat enough to sit on a burner ring after forming. Three-ply 304 + 1050 + 430 is the standard answer, with the total thickness set against the pan size and the press.
The failure mode to plan for is base distortion after forming. It comes from residual stress in the sheet and from an unbalanced layer ratio, and the cure is a leveling and annealing regime that suits the thickness, not a heavier blank.
Soup pots, stock pots and hot pots
Straight-walled pots use a heavier total thickness and a shallower draw, so the risk shifts from the radius to the wall: thickness consistency around the circumference and a rim that takes a lid without going oval.
Hot pots often take a patterned surface, because the cooking face stays visible in use. That moves the specification onto the etched or embossed route, where pattern depth and rim width become part of the acceptance criteria.
Milk pots and rice cooker liners
These are small, deep draws in thinner material. Heat distribution at low flame matters more than maximum conductivity, and the surface finish is usually polished by the pan maker, so plain sheet is the normal specification.
Rice cooker liners are usually formed from a disc rather than a sheet, because the draw is deep and the diameter is fixed by the product. Disc diameter tolerance and flatness are the fields to agree first.
Pressure cookers
Pressure cooker bodies are formed from clad material as well, but the pressure rating belongs to the finished vessel and its safety standard. The material specification covers the layer structure, the thickness and the bond; the vessel manufacturer validates the rest.
Questions
Common questions
Which structure should a wok factory start with?
Three-ply 304 + 1050 + 430 in plain sheet or discs is the usual starting point. The total thickness depends on the wok size, the draw depth and the press capability.
Can the material be supplied as a pre-cut blank for a specific pot?
Yes, including single-ear and double-ear blanks cut to the profile with the handle lug positions included.
Does a patterned surface help with food release?
It reduces contact between food and metal and hides scratches from use. It does not make an uncoated pan non-stick, and claims should be tested on the finished product.
What thickness for a pressure cooker body?
It follows the design and the safety standard the vessel is built to. Send the drawing and the applicable standard, and the achievable range is confirmed.
Can one batch mix pot sizes?
Different diameters can come from the same structure, but they are usually cut as separate items. Mixed loading is quoted per combination.