Knowledge

The performance grade of bolts used for steel structure connection is 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 and so on. Bolts of grade 8.8 and

Fasteners in the market is also known as standard parts, is the two or more than two parts (or components) fastening connection into a whole when the

45# steel is called in GB, S45C in JIS, 1045,080M46 in ASTM and C45 in DIN 45# steel for high quality carbon structure with steel, hardness is not hig

Fasteners are widely used and are usually called standard parts in the market. In the process of use, we need to choose the right type of fastening an

Screw commonly used surface treatment process oxidation, electrophoresis, electroplating, dacro four categories, the following mainly to the surface t

Rivets are parts of riveted parts that are connected by self-deformation or interference in riveting. There are many kinds of rivets, and they are inf

According to the development of social level, the high strength bolt needs to be improved constantly. However, there are still some problems in the hi

I would like to share the reasons and solutions of some nonconforming fasteners and bolts. I hope it will be helpful to you. 1.Inner hexagon, outer he

1. How to quench but not hard? It is often heard in the quenching site that parts are quenched without hardening. The purpose of quenching is to impro

1. Annealing of steel Steel is heated to a certain temperature and kept warm for a period of time, and then allowed to cool slowly, which is called an

1. Yield point (σ S) When the steel or sample is stretched, when the stress exceeds the elastic limit and the steel or sample continues to undergo obv

Wire rods and straight rods with a diameter of 5-9mm (also hot-rolled by rolling mills). Wires of all kinds (cold drawn by wire drawing machines) are