Types and uses of high alloy steel
High alloy steel refers to alloy steel with more than 10% alloying elements in the steel. Its brand name is prefixed with the letter X, followed by a number representing the average carbon content (in tens of thousands) and alloy element symbols (arranged by content), and finally the average percentage value indicating the content of each major alloy element (rounded to an integer).
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Classification of carbon steel
Carbon steel is an iron carbon alloy with a carbon content ranging from 0.0218% to 2.11%. Also known as carbon steel. Generally, it also contains small amounts of silicon, manganese, sulfur, and phosphorus. Generally, carbon steel with higher carbon content has higher hardness and strength, but lower plasticity.
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National standard for duplex stainless steel
The new standard GB/T 20878-2007 "Grades and Chemical Composition of Stainless Steel and Heat Resistant Steel" in China has added many grades of duplex stainless steel. For example: 14Cr18Ni11Si4AlTi, 022Cr19Ni5Mo3Si2N, 12Cr21Ni5Ti. More grades can be found in the standard.
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