How should \"killed carbon steel\" be translated and understood in terms of materials?
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On the equipment specification diagram, it is indicated that the material is killed carbon steel. How should this be translated and understood? What exactly is this type of material? This post was last edited by ly028 on 2009-4-14 at 16:22.]
Killed Carbon Steel (KCS): Killed carbon steel, deoxidized steel
Killed Carbon Steel (KCS) – Killed carbon steel; Killed Steel – Killed steel; Killed Steel (deoxidized steel) – Deoxidized steel. It seems that “KILLED” in the original text is a printing error
I changed it to \"Killed Carbon Steel\". Is this term specific to pressure vessels? For example, 16MnR or 20R? Thank you all for your guidance
Calmed steel can also be called deoxidized steel due to its complete deoxidation. Q235-A is a type of calmed steel
Calming steel refers to a type of steel resulting from special steelmaking processes; it should not refer to a specific variety such as aluminum-calming steel. During the converter steelmaking process, oxygen blowing results in a high amount of oxygen in the molten steel. By adding aluminum ingots or aluminum wires, a reaction takes place with the oxygen to form alumina, thereby removing the active free oxygen from the molten steel and stabilizing it. This type of steel is known as aluminum-calming steel, or also as aluminum-deoxidized steel. The designation methods for carbon structural steel and low-alloy high-strength structural grades classify the aforementioned steels into two main categories: general-purpose steels and special-purpose steels. a. For general structural steel, the pinyin letter “Q” representing the yield strength is used. The yield strength value (in MPa), along with symbols such as quality grade and deoxidation method, sequentially constitute the grade designation. For example: the grades of carbon structural steel are denoted as Q235AF, Q235BZ ； The grades of low-alloy high-strength structural steel are denoted as: Q345C, Q345D. In the designation of carbon structural steel, the symbol “Z” for normalized steel and the symbol “TZ” for specially normalized steel can be omitted. For example, Q235 steel with quality grades C and D should be denoted as Q235CZ and Q235DTZ respectively, but it can also be written as Q235C and Q235D. Low-alloy high-strength structural steel includes normalized steel and specially normalized steel, but the symbol indicating the deoxidation method is not included at the end of the grade designation. b. Special structural steel is generally denoted by the symbol “Q” representing the yield strength of the steel, the value of the yield strength, and a symbol indicating the intended use of the product; for example, the steel grade used for pressure vessels is indicated as “Q345R”” ； The grade of weathering steel is denoted as: Q340NH.
Calmed carbon steel, compared to ordinary carbon steel, can withstand lower medium temperatures, up to -46°C, while ordinary carbon steel can only withstand -19°C.
Killed carbon steel, also known as normalized carbon steel or simply carbon steel, refers to steel whose mechanical properties depend on the carbon content in it; it generally does not contain large amounts of alloying elements. It is sometimes also called plain carbon steel. Carbon steel, also known as carbonaceous steel, refers to an iron-carbon alloy with a carbon content WC of less than 2%. In addition to carbon, carbon steel generally also contains small amounts of silicon, manganese, sulfur, and phosphorus. Based on their application, carbon steel can be divided into three categories: carbon structural steel, carbon tool steel, and free-cutting structural steel. Carbon structural steel is further divided into building structural steel and machine manufacturing structural steel ； Based on the smelting method, it can be divided into open-hearth steel, converter steel, and electric-arc furnace steel ； Based on the deoxidization method, it can be divided into boiling steel (F), killed steel (Z), semi-killed steel (b), and specially killed steel (TZ) ； Based on carbon content, carbon steel can be divided into low-carbon steel (WC ≤ 0.25%), medium-carbon steel (0.25%—0.6% WC), and high-carbon steel (WC > 0.6%) ； Based on phosphorus and sulfur content, carbon steel can be classified into ordinary carbon steel (with higher levels of phosphorus and sulfur), high-quality carbon steel (with lower levels of phosphorus and sulfur), ultra-high-quality steel (with even lower levels of phosphorus and sulfur), and special-grade high-quality steel. In general, the higher the carbon content in carbon steel, the greater its hardness and strength, but its ductility is lower.
killed carbon steel killed carbon steel
Killed Carbon Steel, also known as killed steel, is often denoted as KCS in drawings and documents, especially in those from foreign countries