The strength of the girder is more or less qualified.
at 390MP and above. The strength of the girder is more than 390MP, and the semi-trailer girder is made of 510L automotive girder steel, and the yield strength is above 390MP. 510L is a representative product of hot-rolled automotive steel plate, which is mainly used in the manufacture of important components such as automotive longitudinal beams, cross beams, reinforcing beams, axle housings, and bumpers. Refer to GB-T3273-2005 hot-rolled steel plate and steel strip for automobile girder A should be ordinary precision, B is higher precision.
Automobile girder plate 710L strength.
The steel 710L for automobile girders represents the minimum standard for their tensile strength. Specifically, 710 represents the tensile strength value of megapascals (MPa), while"l"It is the initial letter of "Liang" in Hanyu Pinyin. Therefore, the higher the tensile strength, the better the plasticity of the steel and the less likely it is to deform and fracture1.
High-strength low-alloy structural steel. This steel has high strength, excellent ductility and good weldability, suitable for high-speed, overload and complex roads and other high-risk uses, common low-alloy structural steel includes Q345B, Q345D, Q550D, etc., of which Q345B** is cheaper, mainly used in ordinary vehicles, and Q550D has higher strength, used to carry overweight and high-speed large trucks and engineering vehicles.
High modulus of elasticity steel. This steel has a higher modulus of elasticity and is better able to resist deformation and vibration, and commonly used high modulus steels include SAPH440, which is commonly used in structural parts such as girders and frames for trucks, agricultural vehicles, light vehicles, racing cars, and large buses.
Aluminum alloy. This material has the characteristics of light weight, excellent thermal conductivity and thermal expansion, and has been widely used in the field of automobile manufacturing in recent years.
In addition, carbon structural steel plates can also be used for automobile girder plates, such as Q235, Q345 and other models, these materials have high strength and are relatively cheap, and have been widely used in body structure parts such as automobile girders, wheel hubs, etc.