The difference between high-strength bolts and ordinary bolts

Release time:

2023-05-09

The difference between the two is the strength of the material. The first point: from the raw materials: High-strength bolts are made of high-strength materials. The screw, nut and washer of high-strength bolt are made of high-strength steel, commonly used 45 steel, 40 boron steel, 20 manganese titanium boron steel. Ordinary bolts commonly used Q235 steel manufacturing. The second point: from the strength level: Commonly used 8.8 and 10.9 two strength levels, of which the majority of the 10.9 level. The strength grade of ordinary bolts is low, generally 4.4, 4.8 and 5.6. (8.8S and 10.9S for steel structure only)

The difference between high-strength bolts and ordinary bolts

The name is different, the natural performance is different, usually high-strength bolts can withstand the load than ordinary bolts of the same specification.
The material of ordinary bolts is Q235 (ie A3) manufacturing.
The material of high-strength bolts is 45# steel, alloy steel (such as 20MnTiB, 35VB) or other high-quality materials, which are heat treated to improve the strength.
The difference between the two is the strength of the material.
The first point: from the raw materials:
High-strength bolts are made of high-strength materials. The screw, nut and washer of high-strength bolt are made of high-strength steel, commonly used 45 steel, 40 boron steel, 20 manganese titanium boron steel. Ordinary bolts commonly used Q235 steel manufacturing.
The second point: from the strength level:
Commonly used 8.8 and 10.9 two strength levels, of which the majority of the 10.9 level. The strength grade of ordinary bolts is low, generally 4.4, 4.8 and 5.6. (8.8S and 10.9S for steel structure only)