With different names, the natural performance is different. Generally, high-strength bolts can withstand larger loads than ordinary bolts of the same specifications.
Ordinary bolts are made of Q235 (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)
154, Screw strength torsion test