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How can I determine the cooling water flow of square billet mold for special steel?
- Mold heat balance method. If the heat of the molten steel in the mould is taken away from the cooling water, the heat released by the solidification of the molten steel is equal to the amount taken away by the cooling waters
What's the difference between special steel and ordinary steel?
- Compared with ordinary steel, special steel has higher strength and toughness, physical properties, chemical properties, biocompatibility and process performance.s
What is the difference between general steel and special steel?
- Special steel: it is an important symbol to measure whether a country can become a steel power. It is the main steel used in most industries such as machinery, automobile, military industry, chemical industry, household electrical appliance, shipping, traffic, railway and new industries. China's special steel industry is responsible for the special steel products needed by the key industries such as defense industry, high and new technology industry and machinery and automobile industry. China manufacturing growth to provide a space for the development of domestic special steel, sustained and rapid development of manufacturing industry, especially in machinery, automobile, machinery, shipbuilding and other industries, the strong demand of special steel, become the direct impetus to support excellent steel market.s
What are the varieties of special steel
- China and Japan, the definition of special steel is relatively close, the special steel into high quality carbon steel, alloy steel, high alloy steel (alloy element is greater than 10%) three categoriess
Classification of special steel products
- According to the carbon content of the steel can be divided into low carbon steel (WC = 0.25%), steel (0.25% WC 0.6%) and high carbon steel (wc>0.6%) according to the content of phosphorus and sulfur can be divided into ordinary carbon steel (carbon steel with phosphorus, sulfur, high quality carbon steel (P), low sulfur and high quality (steel) phosphorus, sulfur lower).In general, the higher carbon content in carbon steel, the higher hardness and higher strength, but lower plasticity. This kind of steel is mainly carbon steel to ensure mechanical properties, so the brand reflects its mechanical properties, represented by the Q+ number, "Q" to "yield point bend" word Pinyin prefix, a digital representation of the yield point value, such as Q275 said the yield point is 275MPa. If the grades are marked with letters A, B, C and D, the quality grade of steel is different. The quantity of S and P is reduced, and the quality of steel is improved. If the letter "F" is marked behind the grade, it is "boiling steel". The label "B" is a semi killed steel, and no "F" or "B" is used as a killed steel. For example, Q235-A = F indicates a yield point of 235MPa for grade a rimmed steel, and Q235-c represents a C grade killed steel with a yield point of 235MPa.s
What grade of iron powder should be used for processing special steel? Are there any other elements on the request? How much are they?
- The main special steel carbon structural steel, carbon tool steel, carbon spring steel, alloy spring steel, alloy structural steel, bearing steel, alloy tool steel, alloy tool steel, high-speed tool steel, stainless steel, heat-resistant steel and high-temperature alloy, precision alloy, gold and other electric heating.s
Is the steel column of the steel structure HM a special steel?
- It should be in capitals: HM, HW, wide flange, and HN narrow flange. Steel is Q235, Q345 are low carbon steel hot rolled.s
What is special steel? What is special steel?
- Special steel is the abbreviation of special steel, which is the most important factor in the steel industry of most industries in the national economy, such as machinery, automobile, military industry, chemical industry, household electrical appliance, shipping, traffic, railway and new industries.s
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