Differences between high-strength bolts and ordinary bolts
With different names, the natural performance is different. Generally, high-strength bolts can withstand larger loads than ordinary bolts of the same specifications.
The material of ordinary bolts is made of Q235 (ie A3).
High-strength bolt material 45 # steel, alloy steel (such as 20MnTiB, 35VB) or other high-quality materials, made of heat treatment, increased strength.
The difference between the two is the difference in material strength.
The first point: From raw materials:
High-strength bolts are made of high-strength materials. The bolts, nuts and washers of high-strength bolts are made of high-strength steel. They are commonly used in No. 45 steel, 40-boron steel and 20-manganese-titanium-boron steel. Ordinary bolts are commonly made of Q235 steel.
The second point: From the strength level:
Commonly used 8.8 and 10.9 two intensity levels, of which 10.9 mostly. Ordinary bolt strength level is low, generally 4.4, 4.8, 5.6. (8.8S and 10.9S are special for steel structures)