Introduction
Metallurgical industry plays an indispensable role in various aspects of the global economy. In this highly competitive field, it is necessary to abide by certain standards that help assure quality and protect the safety of both users and manufacturers. In China, nine general standards relating to this industry are enforced. The purpose of this paper is to introduce these standards and discuss their importance.
General standards for metallurgical industry
1.GB/T1149 Steel Chemical Analysis
This standard outlines the requirements for chemical analysis when determining compositional content in steels during metallurgical production. It covers the testing methods, sampling and sample preparation, equipment and materials, chemicals, test procedures and reporting of results.
2.GB/T1150 Quality Classification of Iron Ore
The quality of iron ore is important for further metallurgical operations. This standard provides criteria for the classification of iron ores. Parameters such as chemical composition, physical properties, size and shape are taken into consideration.
3.GB/T1151 Heat Treatment of Steel
This standard covers the requirements of heat treatment processes used in the production of steel. Some parameters such as temperature, time, type of heat treatment, alloyed elements and cooling medium are included.
4.GB/T1152 Steel Warp Mark
The warp mark is used to measure the surface property of steel and its changes during heat treatment. This standard provides guidance to the determination and criteria for evaluation of steel warp mark.
5.GB/T1153 Steel Impurities
This standard sets out the requirements for determining the amount of impurities such as sulphur, phosphorus, etc. present in steel. It describes the sampling and testing requirements, as well as reporting of results.
6.GB/T1154 Steel Brightness Stimulation
The degree of steel brightness is used to measure the quality of the steel surface after heat treatment. This standard provides guidance to the testing methods and reporting of results.
7.GB/T1155 Structural Steel
This standard covers the requirements for the determination of structural steel including chemical composition, physical characteristics and allowable deviations.
8.GB/T1156 Steel Casting
This standard provides guidance for the production and quality control of steel castings. It covers melt analysis and casting process requirements, as well as testing and reporting procedures.
9.GB/T1157 Hardness of Steel
This standard outlines the procedures for the determination of hardness in steels. The hardness testing must include testing conditions as well as acceptable ranges of hardness.
Conclusion
The above nine standards are necessary to ensure the metallurgical production process runs smoothly and safely. They provide important guidance on parameters such as chemical composition, physical characteristics, heat treatment, impurities and hardness. These standards are applicable to many industries and products, which allows them to be used universally. Therefore, it is essential that they are followed in order to provide a safe, high-quality and efficient production process.
