The steel tubes used for truck anti - collision beams are usually made of high - strength alloy steel or ultra - high - strength steel.

● Outer diameter: Generally, it is between several tens of millimeters and more than one hundred millimeters. Common sizes include 89mm, 100mm, 120mm, etc.

● Wall thickness: Usually, it is about 3mm - 6mm. The specific thickness is determined according to factors such as the type of truck, load - carrying capacity, and anti - collision requirements.