Who knows these engineering materials, does anyone know what materials they are made of?

Superwool is super cotton, which is a biosoluble fiber cotton, which replaces ceramic fibers and asbestos, and can be born without degrading. Beijing Fei Pufu.

It's still far from the result I wanted!

It's She Taicui, you can check it, it's definitely not beeswax amber or anything like that, and there is no oiliness. There is also no transparency of beeswax amber.

Amber beeswax is a material made from a mixture of amber and beeswax, usually brown or yellowish-brown in color. It has high transparency and hardness, and can be used to make various ornaments, sculptures, and crafts. Amber beeswax also has many medical and health applications, such as for relieving symptoms of arthritis and rheumatism, promoting blood circulation, and immune system function.

In addition, amber beeswax is also widely used in fragrance and beauty products.

Beeswax or stone, mostly beeswax.

Engineering materials are divided into four categories: metal materials, non-metallic materials, polymer materials and composite materials according to their chemical composition.

a) Metallic materials.

Metallic materials are the most important engineering materials, including metals and metal-based alloys. Industrially, metals and their alloys are divided into two major parts:

1 Ferrous materials: iron and iron-based alloys (steel, cast iron, and ferroalloys).

2 Non-ferrous metal materials: all metals other than ferrous metals and their alloys.

The most widely used is ferrous metals. Iron-based alloy materials account for more than the entire structural materials and tool materials. Ferrous metal materials have superior engineering properties and are also cheaper, and are the most important engineering metal materials.

Non-ferrous metals can be divided into light metals, fusible metals, refractory metals, rare earth metals and alkaline earth metals according to their properties and characteristics. They are important materials for special purposes.

2) Non-metallic materials.

Non-metallic materials are also important engineering materials. It includes refractory materials, refractory thermal insulation materials, corrosion-resistant (acid) non-metallic materials and ceramic materials, among others.

3) Polymer materials.

Polymer materials are organic synthetic materials, also known as polymers. It has high strength, good plasticity, strong corrosion resistance, good insulation and light weight, and is the fastest growing new type of structural material in engineering. There are many types of polymer materials, which are usually divided into three categories according to their mechanical properties and use status

Plastics, rubber, synthetic fibers.

4) Composites.

Composite materials are materials that are combined with two or more different materials, and their properties are not possessed by other elemental materials. Composites can be composed of a composite of various different kinds of materials. It is superior to simple metals, ceramics and polymers in terms of strength, stiffness and corrosion resistance, and is a special engineering material with broad development prospects.

Engineering materials are divided into four categories based on the nature of the material or the nature of its bonding bonds:

1. Metal materials: including metals and metal-based alloys. There are 2 major parts in the industry: ferrous metals and non-ferrous metals.

2. Ceramic materials: compounds of one or more metal elements and a non-metallic element (usually oxygen) belong to inorganic non-metallic materials, and there are generally three kinds of industrial ceramics: ordinary ceramics, special ceramics and cermets.

3. Polymer materials: organic synthetic materials, also known as polymers. It consists of a large number of macromolecular compounds with a particularly high molecular weight, each containing a large number of structurally identical, interconnected links. There are three main categories of engineering: plastics, rubber, and synthetic fibers.

4. Composite materials: a combination of two or more different materials. Can be composed of a variety of different kinds of material compounds, and bonding bonds are very complex. Such as: stainless composite steel.

Is this in your own hands? Have you ever flipped its weight? How dense do you feel?

If the density is very small, that is to say, it is so large that the volume is upside down and the weight is very light, then it is likely to be made of plastic! If it's a little heavier, it's probably made of jade or glass.

By feeling, the possibility of your jade is relatively small.

This should be a ferroalloy with chromium and iron as the main components, which can be called ferrochrome.