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The international standards for steel mainly include the following:
ISO standards: ISO standards are formulated by the International Organization for Standardization. The steel material standards mainly include ISO 683-1, ISO 4957, etc. Among them, ISO 683-1 mainly stipulates the requirements for the quality, dimensions, and permissible variations of steel, while ISO 4957 mainly stipulates the material requirements for tool steels.
ASTM standards: ASTM stands for American Society for Testing and Materials. The steel material standards mainly include ASTM A36, ASTM A572, etc. These standards mainly stipulate the requirements for the chemical composition, mechanical properties, dimensions, and permissible variations of steel.
GB standards: Although GB standards are Chinese national standards, they are also widely accepted and applied in international trade and technical exchanges. China's steel material standards mainly include GB/T 700, GB/T 1591, etc. These standards mainly stipulate the technical requirements, test methods, inspection rules, and other requirements for ordinary carbon structural steel, high-strength low-alloy structural steel, and other steel materials.
JIS standards: JIS stands for Japanese Industrial Standards. The steel material standards mainly include JIS G3101, JIS G3106, etc. These standards mainly stipulate the chemical composition, mechanical properties, dimensions, and permissible variations of ordinary structural steel, high-strength low-alloy structural steel, and other steel materials.
EN standards: EN standards are formulated by the European Committee for Standardization (CEN). Among them, EN 10025-2 specifically stipulates the technical requirements for hot-rolled structural steel plates and strips. This standard applies to steel of different strength grades, such as S235 (steel for general structural purposes), S275 (steel for general structural purposes), S355 (high-strength structural steel), etc. It also stipulates in detail the mechanical properties, chemical composition, dimensional tolerances, surface quality, as well as inspection and testing requirements of steel.
In addition, there are other steel standards formulated by international standard organizations or countries, such as Russia's GOST standards and India's BIS standards. These standards have wide applications and recognition in their respective countries and regions.
In general, the international standards for steel cover multiple aspects, including chemical composition, mechanical properties, dimensions and permissible variations, surface quality, etc. When selecting and applying steel materials, it is necessary to refer to the corresponding international standards to ensure that the quality and performance of the materials meet the requirements.