Industry News

High strength bolt quality matters needing attention

Hardware fastener companies talk most about "transformation" and "upgrading". However, under the premise of transformation and upgrading, the vast majority of Chinese fastener companies will face such a situation: rising raw material prices, RMB appreciation and labor costs. Rising raw material costs have led to companies have to increase product prices, but the premise of rising product prices is the improvement of technology and brand strength, which is a continuous process, which is for small and medium-sized fastener companies, technology improvement is a bottleneck, They need to be difficult to survive. Hardware fasteners need to be removed from the "low-end" label. Hardware fasteners have been dominated by steel materials.

2018-04-17

What is the difference between hexagon socket head cap screws grade 12.9 and grade 10.9

The performance grade of bolts for steel structure connection is divided into more than 10 grades, such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc. Among them, the 8.8 grade and above bolts are made of low carbon alloy steel or medium carbon steel and are heat treated (quenched and tempered), commonly known as high strength bolts, and the rest are commonly known as ordinary bolts. The bolt performance grade label consists of two parts, which respectively represent the nominal tensile strength value and yield ratio of the bolt material. For example, a bolt with a performance grade of 4.6 means: 1. The nominal tensile strength of the bolt material reaches 400MPa; 2. Bolt

2018-04-17