G80 alloy steel lifting chain is an important component used in lifting machinery. It is made of high-strength metal materials, such as manganese steel chain. It is hinged to each other through chain links, and has the characteristics of high strength, good toughness, wear resistance, etc., and can withstand large loads. It is widely used in electric hoists, hand hoists, cranes and other equipment. It can lift and pull heavy objects safely and reliably. It is a key component for heavy object handling in industries such as industry and construction.
To select a suitable lifting chain, you need to consider the following key factors:
Carrying capacity: According to the actual lifting requirements, accurately calculate the maximum weight required to be lifted, and select a chain with a rated load greater than this weight to ensure safety. Generally, a certain safety margin should be left.
Chain size: The diameter, pitch and other dimensions of the chain need to match the lifting equipment, such as electric hoists, hand hoists, etc. Different equipment has specific requirements for chain size to ensure good engagement and transmission.
Material characteristics: Common materials include carbon steel, alloy steel, etc. Carbon steel chains are relatively low in cost and suitable for general environments; alloy steel chains are stronger, more tough, and more wear-resistant, suitable for harsh working conditions and high-load operations.
Working environment: If used in a humid and corrosive environment, you need to choose a chain with surface treatments such as galvanizing and nickel plating to improve corrosion resistance; in a high temperature environment, you need to consider the heat resistance of the chain.
Quality certification: Choose products with relevant quality certifications, such as ISO standard certification, to ensure that the chain meets industry specifications and safety requirements, and the product quality is guaranteed.
The determination of the safety factor of the lifting chain is also related to the quality and reliability of the chain and the working environment. The following is a detailed introduction:
Chain quality and reliability: Chains with reliable quality, strict quality inspection and certification, such as those made of high-quality alloy steel with advanced manufacturing technology and strict quality control, can have a lower safety factor. On the contrary, if there is a certain uncertainty in the quality of the chain, the safety factor should be high to compensate for possible quality defects.
Working environment: Harsh working environment, such as high temperature, humidity, corrosion and other environments, will reduce the performance and life of the chain, and the safety factor needs to be increased. For example, for lifting chains operating near high-temperature furnaces, the high temperature will reduce the strength of the chain material, so the safety factor is generally 5-6 to ensure sufficient safety protection in harsh environments. In a good environment with normal temperature and dryness, the safety factor can be appropriately reduced according to the specific situation.
In addition, relevant industry standards and specifications also have clear requirements for safety factors, and these regulations must be followed in practical applications to ensure the safety of lifting operations.
The quality grade of lifting chains is usually divided according to relevant standards and characteristics. The common classification methods are as follows:
Classification by material properties: It can be divided into ordinary carbon steel chain, high-quality carbon steel chain and alloy steel chain, etc. Ordinary carbon steel chain is suitable for general lifting occasions, high-quality carbon steel chain has good strength and toughness, and alloy steel chain has higher strength, wear resistance and corrosion resistance, and is often used in harsh working conditions and high-demand lifting operations.
Classification by manufacturing precision: Chains with high manufacturing precision have small chain link size tolerances, low surface roughness, smoother transmission, and can withstand higher loads. Chains with lower precision are suitable for simple lifting equipment with low precision requirements.
Classification by load-bearing capacity: Chains of different quality grades have different rated load-bearing capacities. The load-bearing capacity of the chain is generally determined by methods such as tensile tests, and the grades are divided accordingly. The higher the load-bearing capacity of the chain, the higher the quality grade is usually, which can meet the lifting needs of larger and heavier objects.
Classification by surface treatment: Chains with surface treatments such as galvanizing, nickel plating, and blackening can improve their corrosion resistance and wear resistance. The quality and effect of the surface treatment can also be used to distinguish the quality grades of the chains to a certain extent.
Different countries and industries may have their own specific classification standards, but in general, the quality grades of lifting chains are evaluated based on materials, manufacturing accuracy, load-bearing capacity, and surface treatment.
