Q345 Carbon Steel Material
steel Product Introduction
Q345 is a kind of steel material. It is a low alloy steel (C < 0.2%), with good comprehensive properties, low temperature properties, cold stamping properties, welding properties and machinability. It is widely used in bridges, vehicles, ships, buildings Pressure vessel etc. Q represents the yield of this material. The 345 in the back refers to the yield value of this material, which is about 345. The yield value decreases with the increase of material thickness.
Basic introduction
① It is composed of Q + number + quality grade symbol + deoxidation method symbol. Its steel grade is prefixed with "Q" to represent the yield point of the steel, and the subsequent number represents the yield point value in MPa. For example, Q235 represents the yield point( σ s) Carbon structural steel 235 MPa.
② If necessary, the symbol indicating the quality grade and deoxidation method can be marked after the steel grade. The quality grade symbols are a, B, C, D and E. Symbol of deoxidation method: F Rimmed steel ; B represents semi killed steel; Z represents semi killed steel Killed steel ; TZ means special killed steel. Killed steel may not be marked, i.e. Z and TZ can not be marked. For example, q235-af stands for class a rimmed steel.
③ Carbon steel for special purposes, such as bridge steel, marine steel, etc., basically adopts the expression of carbon structural steel, but the letter indicating the purpose is added at the end of steel grade.
Steel plate Product Details
| Name | Grade | Tension Test | 180℃ bending test d=Diameter of bending center a=Thickness of sample (Diameter) |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yield point, Mpa | Tensile Strength Mpa | Elongation % | Impact Power, AkV, J | ||||||||||
| Thickness (Diameter Side Length) mm | |||||||||||||
| ≤16 | >16-35 | >35-50 | >50-100 | +20℃ | 0℃ | -20℃ | -40℃ | ||||||
| ≥ | Thickness of steel (Diameter) mm | ||||||||||||
| ≤16 | >60-100 | ||||||||||||
| Q345 | A | 345 | 325 | 295 | 275 | 470-630 | 21 | ||||||
| B | 345 | 325 | 295 | 275 | 470-630 | 21 | 34 | ||||||
| C | 345 | 325 | 295 | 275 | 470-630 | 22 | 34 | ||||||
| D | 345 | 325 | 295 | 275 | 470-630 | 22 | 34 | ||||||
| E | 345 | 325 | 295 | 275 | 470-630 | 22 | 27 | ||||||
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