The global stainless steel market has experienced significant fluctuations in recent months, driven by a combination of supply chain disruptions, raw material cost volatility, and shifting demand dynamics. Industry experts are closely monitoring these trends to provide insights into future price movements.
Tensile performance is one of the main performance indicators of metal materials, among which yield and tensile strength are the most representative mechanical performance indicators of metal materials, and are also important bases for stress calculation in engineering design and mechanical design. For metal materials used in high-temperature environments such as aircraft engines, pressure vessels, nuclear power equipment and thermal pipelines, high-temperature tensile performance data is the most basic and indispensable assessment data. In 1984, my country issued the first edition of the national standard for high-temperature tensile test of metal materials. So far, it has undergone three revisions in 1995, 2006 and 2015. The latest version of the standard has been renamed GB/T 228.2-2015 “Metallic Materials Tensile Test Part 2: High-temperature Test Method”, replacing GB/T 4334-2006 “Metallic Materials High-temperature Tensile Test Method”. The standard specimen used in the tensile test of metal materials is machined from the sample blank, which usually includes turning, milling, planing, grinding and other processes. The feed speed and cooling speed should be controlled in each machining process to prevent the material properties from being affected by heat or cold working hardening. For the processed standard specimens, the specimen size and roughness must first be...
The reasons for unqualified impact performance of medium and thick plates can be attributed to multiple aspects, mainly including raw material problems, production process problems and problems in the quality inspection process. The following is a detailed analysis of these reasons: If the composition of the slab used for rolling medium and thick plates is unreasonable, such as too much sulfur, phosphorus and other impurities in the molten steel, these impurities will affect the purity and organizational structure of the steel plate, thereby reducing its impact performance. Insufficient or excessive content of alloying elements in stainless steel may also cause the impact performance of the steel plate to be substandard. During the smelting and rolling process, if the control is not proper, segregation and banded structure may appear in the steel. These organizational defects will reduce the impact toughness of the steel plate, especially under low temperature conditions. In the production process, the setting of the heating temperature of the slab heating has an important influence on the performance of the medium and thick plate. If the heating temperature is too low, the steel plate may be uneven in organization and affect its impact toughness; if the heating temperature is...
The reasons for unqualified impact performance of medium and thick plates can be attributed to multiple aspects, mainly including raw material problems, production process problems and problems in the quality inspection process. The following is a detailed analysis of these reasons: If the composition of the slab used for rolling medium and thick plates is unreasonable, such as too much sulfur, phosphorus and other impurities in the molten steel, these impurities will affect the purity and organizational structure of the steel plate, thereby reducing its impact performance. Insufficient or excessive content of alloying elements in stainless steel may also cause the impact performance of the steel plate to be substandard. During the smelting and rolling process, if the control is not proper, segregation and banded structure may appear in the steel. These organizational defects will reduce the impact toughness of the steel plate, especially under low temperature conditions.
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