Can Shi Shi Tong make 8.8 with long screws?

Many people in the choice of carbon steel material to do the screw, generally will have requirements on the strength of the screw, such as 4.8, 6.8, 8.8, 10.9, 12.9. The type of carbon steel used varies according to the strength grade. When Mr. Zhang was making long screws made of carbon steel, he asked Shi Shi Tong whether they could produce 8.8 class.

Before answering Mr. Zhang’s question, Shi Shi Tong asked Mr. Zhang what size of long screws he needed, so that we could answer whether Mr. Zhang could make 8.8. Since there are two ways to make 8.8 steel screws, one is to stiffen them. One is the direct use of high strength materials, such as 10b21, SCM435, this material is produced at least 8.8 strength.

However, there is a disadvantage in both ways. The first way is to require the length of the long screw. If the screw is too long, it will bend when being hardened. The second method has strict requirements on the number of screws, because this direct production is 8.8 grade material with a minimum order amount of about 2 tons.

So Shi Shi Tong needs to ask Mr. Zhang about the size of screws. If you also need to customize 8.8 class long screws, welcome to consult Shi Shi Tong.

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