Q355NE and Q355E are low-alloy high-strength steel plates and low-carbon steels. These two models are national standard code. The implementation standard is GB/T1591-2008, which was changed to GB/T1591-2018 since February 1st, 2019, and the original Q345B was changed to Q355. The new implementation standard, the delivery status of Q355NE steel plate is normalized or normalized rolling, the default delivery status is normalized rolling, the delivery status of Q355E steel plate is hot rolled, and the quality grades are B, C, D, E, F . Corresponding to the impact temperature, no impact, 0 degree impact, -20 degree impact, -40 degree impact, -60 degree impact. The grades read as Q355NE and Q355E are widely used in low-alloy high-strength plates.
Chemical composition of Q355NE and Q355E:
| C | Si | Mn | P | S | Nb | V |
| not more than 0.18 | not more than 0.5 | 0.90-1.65 | 0.025 | 0.020 | 0.005-0.05 | 0.01-0.12 |
| Ti | Cr | Ni | Cu | Mo | N | Als |
| 0.006-0.05 | not more than 0.30 | not more than 0.50 | not more than 0.40 | not more than 0.10 | not more than 0.015 | not less than 0.01 |
Mechanical properties of Q355NE and Q355E:
Q355NE thickness is 6mm-40mm, tensile strength is 470MPa-630MPa, yield strength is not less than 335MPa, and elongation is not less than 21%.
Delivery status of Q355NE, Q355E steel plates:
The delivery state of Q355E steel plate is hot rolled, and the delivery state of Q355NE steel plate is normalized or normalized rolled, and the default delivery state is normalized rolled.
Z-direction properties of Q355NE and Q355E steel sheets:
The Z-direction performance of the steel plate is the rear-direction performance of the steel plate, and it is the anti-lamellar tearing test of the steel plate.
Q355NE and Q355E grades Z-direction performance representation method:
Q355NE-Z15, Q355E-Z15
Q355NE-Z25, Q355E-Z25
Q355NE-Z35, Q355E-Z35
Q355NE and Q355E steel plate application:
Low-alloy steel plates are widely used in mining machinery, metallurgical machinery, engineering machinery, shipbuilding, large sensing workshops, bridges, high-rise buildings, thermal power plants, nuclear power projects, and Q355ND, Q355NC, Q355NE steels are also designated for wind power project reels Materials, steel plates are also often used in ordinary wear-resistant materials, and wear-resistant parts with non-special requirements.
Cutting of Q355NE and Q355E steel plates:
The steel plate cutting adopts laser cutting and flame cutting. The thickness of the laser cutting steel plate is 8mm-30mm, and the flame cutting the low alloy steel plate below 400mm.
Q355NE and Q355E steel plate set rolling:
Steel plate fixed rolling requires steel plate thickness 8mm-500mm, width according to the mill width of the manufacturer. For example, the rolling mill width of Wugang wide and thick plate production line is 4200mm wide, but the width of the production steel plate shall not exceed 4020mm. The standard stipulates that the Z-direction performance is only applicable to flat products with a thickness of ≥16mm.
