What is the chemical composition of 42CrMo alloy tube?

The two digits at the beginning of the 42CrMo steel number indicate the carbon content of the steel, expressed in ten-thousandths of the average carbon content, such as 40Cr, 42CrMo alloy tubes.

The main alloying elements in 42CrMo alloy tube, except for individual microalloying elements, are generally expressed in a few percent. When the average alloy content is less than 1.5%, generally only the element symbol is indicated in the steel number, but the content is not indicated. However, in special circumstances, which may cause confusion, the number "1" can also be marked after the element symbol, such as steel number "12CrMoV" and "12Cr1MoV", the former has a chromium content of 0.4-0.6%, the latter has a chromium content of 0.9-1.2%, and the rest are all the same. When the average content of alloying elements is ≥1.5%, ≥2.5%, ≥3.5%..., the content should be indicated after the element symbol, which can be expressed as 2, 3, 4... etc. For example, 18Cr2Ni4WA.

42CrMo alloy tube chemical composition:

C: 0.38～0.45

Si: 0.17～0.37

Mn: 0.50～0.80

S : ≤0.035

P: ≤0.035

Cr: 0.90～1.20

Ni: ≤0.030

Cu: ≤0.030

Mo: 0.15～0.25

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