The basic differences between products made of sheet metal by cutting, bending and other forming processes and products made by casting and forging are as follows:

Shape: Products made of sheet metal are usually limited to simple shapes, whereas products made by casting and forging can be made in a wide variety of shapes.

Strength: Products made from sheet metal are usually less strong than products made by casting and forging.

Durability: Products made from sheet metal are typically less durable than products made by casting and forging.

Cost: Products made from sheet metal are usually less expensive than products made by casting and forging. In general, products made of sheet metal are used in applications where strength and durability are less important than cost. Products made by casting and forging are used in applications where strength and durability are more important.

Following are some examples of products made from sheet metal through cutting, bending, and other forming processes:

Car body panels

Gear Boxes

Furniture

Here are some examples of products made through casting and forging:

Engine block

Gear box

Tools

Jewellery

The question:

How the observation was not answered clearly? Could be from the surface or how thick?