What material is Q235F

F is for boiling steel
Q235 is carbon structural steel

Q235F steel consists of Q+number+quality grade symbol+deoxygenation method symbol. Its steel number is prefixed with "Q", which represents the yield point of the steel, and the following number represents the yield point value in MPa. For example, Q235 represents a carbon structural steel with a yield point (σs) of 235MPa.

If necessary, symbols indicating quality grade and deoxidation method can be marked after the steel number. The quality grade symbols are A, B, C, D, respectively. Symbol of deoxidation method: F stands for boiling steel; b stands for semi-killed steel: Z stands for killed steel; TZ stands for special killed steel. For example Q235-AF means A-grade boiling steel.

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