What are the screws made of?

Dec 08,2022

The screw made of carbon steel is our common screw. According to the classification of profiles, they can be roughly divided into low carbon steel (ordinary) and medium carbon steel. High carbon steel (basically unavailable in the market) and alloy steel.

The proportion of chemical composition of raw materials determines the difference in hardness. Low carbon steel is mostly used, mainly for products with low hardness requirements. Therefore, when people need to knock and jingle in life, they usually choose other types of carbon steel screws. As for other types of carbon steel screws, they are used for large-scale machinery manufacturing.

There are three main materials, austenite. Martensite and ferrite,

The common 200 and 302 series stainless steels on the market are nonmagnetic, but from the perspective of wire drawing, their performance is very different from 304 and 304. Annealing. Polishing. Casting and other processes also have a slight magnetism, which is considered to be magnetic. It is one-sided whether it is judged by sed.

The rust resistance of stainless steel is the basis to measure its quality. We can use stainless steel grader to identify it.

The worse the antirust property of the material, the faster the red color is, and the darker the color is; The better the rust resistance, the slower the red color, the lighter the color.

China Carriage Bolts Manufacturers think that there is not much comparability. They have different materials and use environments, which cannot be compared objectively. Each has its advantages and disadvantages.

M3-M39 STAINLESS STEEL COLD FORGING CARRIAGE BOLT

Finish:Plain, ZINC

Material:Stainless Steel, Steel

Place of Origin:China

Standard:DIN

Size:M3-M36

Length:10mm-500mm

Grade:4.8/5.8/8.8 SS304 SS316

production technology:cold forging