1. Strength level
The strength level of truckhub boltsis usually determined according to their material and heat treatment process. Common strength ratings include 4.8, 8.8, 10.9, and 12.9. These grades represent the tensile, shear and fatigue properties of bolts under different conditions.
Class 4.8: This is a low strength bolt, suitable for some occasions with low strength requirements.
Class 8.8: This is a more common bolt strength grade, suitable for general heavy load and high-speed operation occasions.
Class 10.9 and 12.9: These two high-strength bolts are usually used in situations where strength and durability are required, such as large trucks, engineering vehicles, etc.
2. Tensile strength
Tensile strength refers to the maximum stress that a bolt can resist breaking when subjected to tensile forces. The tensile strength of truck wheel hub bolts is closely related to its strength grade.
The nominal tensile strength of Class 8.8 standard bolts is 800MPa and the yield strength is 640MPa (yield ratio 0.8). This means that under normal conditions of use, the bolt can withstand tensile stresses of up to 800MPa without breaking.
For bolts of higher strength grades, such as Class 10.9 and 12.9, the tensile strength will be higher. However, it should be noted that the tensile strength is not the higher the better, but the appropriate bolt strength level needs to be selected according to the specific use environment and requirements.
Post time: Jun-13-2024