Q345C grade size 4*1219*2438mm Steel plate
Description:
Standard：GB/T 1591-2018
Grade：Q345B/Q355B, Q345C/Q355C, Q345D/Q355D
Deliver Condition：Hot rolling
| Grade | C | Si | Mn | P | S | Nb | V | Ti | Cr | Ni | Cu | N | Mo | Als |
| Q345B | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.035 | ≤0.035 | ≤0.07 | ≤0.15 | ≤0.20 | ≤0.30 | ≤0.50 | ≤0.30 | ≤0.012 | ≤0.10 | / |
| Q345C | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.035 | ≤0.030 | ≤0.07 | ≤0.15 | ≤0.20 | ≤0.30 | ≤0.50 | ≤0.30 | ≤0.012 | ≤0.10 | ≥0.015 |
| Q345D | ≤0.18 | ≤0.50 | ≤1.70 | ≤0.035 | ≤0.025 | ≤0.025 | ≤0.15 | ≤0.20 | ≤0.30 | ≤0.50 | ≤0.30 | ≤0.012 | ≤0.10 | ≥0.015 |
Mechanical Properties:
| Grade | Yeild Strength min Mpa | Tensile Strength | Elongation | Impact Test | |||
| T in mm | Mpa | ||||||
| ≤16 | ＞16 ≤30 | ＞30 | ℃ | Impact/J | |||
| ≥ | |||||||
| Q345B | 345 | 325 | 295 | 470-630 | ≥20 | 20 | 34 |
| Q345C | 345 | 325 | 295 | 470-630 | ≥21 | 0 | 34 |
| Q345D | 345 | 325 | 295 | 470-630 | ≥21 | -20 | 34 |
Q345C is a kind of low-alloy high-strength structural steel: (corresponding to the old grades before 88 years: 16Mn,
12MnV, 14MnNb, 16MnRe, 18Nb five grades merged) Q is the first letter of the Chinese pinyin of the Chinese
character “yield”, indicating the strength of yield 345 is the specific value of yield strength: 345MPa The C at
the back is the quality grade symbol of the steel of this strength level, generally divided into A, B, C, D, E and
other levels (the higher the level, the higher the level) Note: The five grades A, B, C, D, E do not correspond
to the previous five steel grades, but the quality grades. The main difference is that the requirements for impact
energy are different: Q345-A: Impact power is not required Q345-B: Requirements for impact energy at room
temperature Q345-C: requires 0℃ impact energy Q345-D: requires an impact energy of -20℃ Q345-E: requires
-40℃ impact energy It can be seen that the following steel grades can be used at low temperatures
We have built a long-term and stable cooperation relation with customers in domestic , such as Shanghai, Jiangsu,
Zhejiang, Anhui, Shandong, Jiangxi, Qinghai, Liaoning, Hainan and so on.
For overseas, our main client from South Asia, Africa, South America like Singapore, Vietnam, Brazil, Ghana,
New Zealand, Spain, Mauritius, Dubai etc.
