The difference between high-strength bolts and high-strength nuts

The difference between high-strength bolts and high-strength nuts

In general, high-strength bolts can withstand greater loads than ordinary bolts of the same specification.

The material of ordinary bolts is Q235 (i.e. A3) manufactured.

The material for high-strength bolts is 45 # steel, alloy steel (such as 20MnTiB, 35VB), or other high-quality materials, which undergo heat treatment after production to improve strength.

The difference between the two is the strength of the material.

First point: From the perspective of raw materials:

High strength bolts are made of high-strength materials。The screw, nut, and washer of high-strength nuts are all made of high-strength steel, commonly used in 45 # steel, 40 boron steel, and 20 manganese titanium boron steel.Ordinary bolts are commonly made of Q235 steel.

The second point: From the perspective of strength level:

High strength nuts are increasingly widely used.There are two commonly used strength levels, 8.8 and 10.9, with 10.9 being the most common. The strength level of ordinary bolts should be low, generally 4.4, 4.8, and 5.6 levels. (8.8S and 10.9S are dedicated to steel structures)