The difference between high strength bolts and ordinary bolts

- May 05, 2017 -

Under normal circumstances, high-strength bolts can withstand the load than the same specifications of ordinary bolts.

The material of the ordinary bolt is made of Q235 (ie A3).

High strength bolts 45 # steel, alloy steel (such as 20MnTiB, 35VB) or other high quality materials, made after heat treatment, to improve the strength.

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

The first point: from the raw materials to see:

High strength bolts are made of high strength materials. High-strength bolts of the screw, nuts and washers are made of high-strength steel, commonly used 45 steel, 40 boron steel, 20 manganese titanium boron steel. Common bolt commonly used Q235 steel manufacturing.

The second point: from the strength level point of view:

High strength bolts, the use of increasingly widespread. Commonly used 8.8 and 10.9 two strength levels, of which 10.9 mostly. Ordinary bolt strength level is low, generally 4.4, 4.8, 5.6. (8.8S and 10.9S special for steel)


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