1. What types of materials and grades can be produced?

Common composite materials:

• 430 + aluminium
• 430 + aluminium + 304
• 430 + 3003 + Al + 3003 + 304

High-end materials include:

• 430 + aluminium + 316L
• 430 + aluminium + 316Ti
• 430 + aluminium + Ti
• 430 + 3003 + aluminium + 3003 + 316L
• 430 + 3003 + aluminium + 3003 + 316Ti
• CU + aluminium + 304
• 430 + CU + aluminium + 304
• CU + 430 + aluminium + 304

2. How are the materials bonded?

Several materials are physically bonded together using a rolling mill, taking advantage of aluminum’s ductility. The process involves many steps, and each factory keeps its own processes secret. Moreover, it is difficult for a single boiler plant to produce this material on its own. A complete set of equipment plus a regular inventory of materials would cost at least 10 million USD. Even with investment, it would be impossible to produce qualified composite materials without skilled technicians.

3. What are the minimum and maximum number of plies?

2-5 plies.

4. What are the minimum and maximum thicknesses or standard thicknesses?

Minimum thickness: 1.2mm
Maximum thickness: 3.5mm

In China, 2.0-2.5mm thickness is preferred, while in the US, South Korea, and Japan, 2.5-3.5mm thickness is preferred.

5. What are the minimum and maximum sizes for rectangular sheets and the diameter for circular discs, or standard sizes?

The length of the rectangle can be customized according to customer requirements, but the width must be within 1250mm.

The diameter is typically 200-500mm.

6. Is 439 stainless steel recommended as the magnetic layer instead of 430?

Actually, using 439 stainless steel as a magnetic material is unnecessary; 430 is better than 439.

First, 439 material is not commonly used in composite materials, so we cannot afford to keep it in stock. Therefore, there are order quantity restrictions, generally in multiples of 20 tons. This makes production more complicated for us and for you to place your order.

Second, 439 material is not always readily available on the market. We need to order from the manufacturer, which takes about one month, making delivery even slower.

Third, 439 is more expensive, but its only advantage over 430 is its superior rust resistance. Otherwise, there is no difference. Furthermore, 430, as a magnetic material, will not rust under normal use and maintenance.

7. Are the materials food-contact safe and corrosion-resistant? Are they suitable for forming into cookware and polishing?

The materials used in the production are food-contact safe, corrosion-resistant, and suitable for molding into cookware and polishing.

The materials we provide all meet these requirements; however, more expensive materials generally have better corrosion resistance, but their tensile properties are basically the same.

Polishing varies depending on the material. 430 is more difficult to polish, but we use high-quality 430 from reputable manufacturers for our composite materials. After stretching, it doesn’t exhibit orange peel texture, and the rim of the pot is almost completely smooth to the touch, making it easy to polish to a shine.