Alloy steel classification and grades
According to the total amount of alloy elements: total alloy content <5 is called low alloy steel, 5% ≤ total alloy content <10% is called medium alloy steel, and total alloy content ≥10% is called high alloy steel. 2. Classified by main alloy elements. For example: 3Cr3MoW2V steel is called chromium tungsten silicon steel.
The grade of alloy steel: the first digit indicates the carbon content wc. If it is one digit, it means wc in thousandths. If it is two digits, it means wc in ten thousandths. If there is no number, it means wc≈1% (specifically Please check the information for how much); when the average carbon content wc ≤ 0.08%, it is represented by "0", and when the average carbon content wc ≤ 0.03%, it is represented by "00". The number after an element indicates the average percentage content of that element. No number indicates that the element is present in <1.5%. Taking 8Cr2MnWMoVS as an example, 8 means wc≈0.8%, Cr2 means wc≈2%, and the contents of Mn, W, Mo, V, and S are all <1.5%.
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