The material of the lifting hook has high tensile strength
The lifting hook is an important crane accessory, and it is also a non-generic accessory. Therefore, it undertakes important processing tasks, and its performance is also related to the safety during the lifting process. Therefore, in the processing step, there should be strict requirements on the material of the hook and the appearance of the finished product.
Hook materials should have a certain tensile strength, and are relatively high in rigidity and toughness, so that they can be safe and reliable. The selection of hook materials should be low-carbon steel or low-alloy steel in accordance with relevant national standards; plate hooks generally use Q235A and C3 steel specified in "Technical Conditions of Ordinary Carbon Structural Steel", or 16Mn steel specified in "Technical Conditions of Low-alloy Structural Steel" GB/T700-88, or 16Mn steel specified in "Technical Conditions of Low-alloy Structural Steel".
The forged hooks with lifting accessories are generally used for 20 steels specified in GB/T699-88 (carbon structural steel number and general technical conditions".
In addition, some hooks are cold-bent. After hot forging and welding, in order to reduce cold work stress, thermal stress and welding stress, appropriate heat treatment must be carried out, such as tempering treatment.
In addition, the lifting hook should do the following after the surface is made: no defects such as cracks, cracks, etc.; whether there are fatigue deformation, cracks and related wear of the pins and sleeves on the neck and surface of the hook.
The lifting hook is an important crane accessory, and it is also a non-generic accessory. Therefore, it undertakes important processing tasks, and its performance is also related to the safety during the lifting process. Therefore, in the processing step, there should be strict requirements on the material of the hook and the appearance of the finished product.
Hook materials should have a certain tensile strength, and are relatively high in rigidity and toughness, so that they can be safe and reliable. The selection of hook materials should be low-carbon steel or low-alloy steel in accordance with relevant national standards; plate hooks generally use Q235A and C3 steel specified in "Technical Conditions of Ordinary Carbon Structural Steel", or 16Mn steel specified in "Technical Conditions of Low-alloy Structural Steel" GB/T700-88, or 16Mn steel specified in "Technical Conditions of Low-alloy Structural Steel".
The forged hooks with lifting accessories are generally used for 20 steels specified in GB/T699-88 (carbon structural steel number and general technical conditions".
In addition, some hooks are cold-bent. After hot forging and welding, in order to reduce cold work stress, thermal stress and welding stress, appropriate heat treatment must be carried out, such as tempering treatment.
In addition, the lifting hook should do the following after the surface is made: no defects such as cracks, cracks, etc.; whether there are fatigue deformation, cracks and related wear of the pins and sleeves on the neck and surface of the hook.
The lifting hook is an important crane accessory, and it is also a non-generic accessory. Therefore, it undertakes important processing tasks, and its performance is also related to the safety during the lifting process. Therefore, in the processing step, there should be strict requirements on the material of the hook and the appearance of the finished product.
Hook materials should have a certain tensile strength, and are relatively high in rigidity and toughness, so that they can be safe and reliable. The selection of hook materials should be low-carbon steel or low-alloy steel in accordance with relevant national standards; plate hooks generally use Q235A and C3 steel specified in "Technical Conditions of Ordinary Carbon Structural Steel", or 16Mn steel specified in "Technical Conditions of Low-alloy Structural Steel" GB/T700-88, or 16Mn steel specified in "Technical Conditions of Low-alloy Structural Steel".
The forged hooks with lifting accessories are generally used for 20 steels specified in GB/T699-88 (carbon structural steel number and general technical conditions".
In addition, some hooks are cold-bent. After hot forging and welding, in order to reduce cold work stress, thermal stress and welding stress, appropriate heat treatment must be carried out, such as tempering treatment.
In addition, the lifting hook should do the following after the surface is made: no defects such as cracks, cracks, etc.; whether there are fatigue deformation, cracks and related wear of the pins and sleeves on the neck and surface of the hook.
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