Q420B Low-alloy High-strength Steel Plate
Q420B hsla steel is a low alloy high strength structural steel plate. The implementation standard of Q420B high strength plate is; GB/T1591-2018 special technical conditions. Q420B low alloy steel material itself has high strength, high toughness, fatigue resistance, impact resistance and wear resistance. And high-quality properties such as easy welding and processing.
Application fields of Q420B low alloy structural steel
1. Construction field: Because Q420B hsla structural steel has high strength and good plasticity, it has been widely used in the construction field and is used to build high-rise buildings, bridges, highways and other infrastructure projects.
2. Manufacturing field: Q420B hsla steel sheet is also widely used in the manufacturing field and is used to manufacture vehicles, trains, ships and other transportation vehicles, as well as other mechanical products.
3. Ship field: Because Q420B high strength low alloy steel plate has good corrosion resistance and high strength, it has been widely used in ship manufacturing and is used to manufacture various types of ships, including cargo ships, oil tankers, warships, etc. .
Q420B Low Alloy Steel Material Chemical Composition :
| Grade | C % | Si % | Mn | P % | S % |
| Q420B | ≤ 0.20 | ≤ 0.55 | 1.00-1.70 | ≤ 0.040 | ≤ 0.040 |
Q420B Low Alloy Steel Mechanical Property:
| Grade | Thickness | Yield Strength (Mpa) | Tensile Strength | Elongation(%) | Impact Energy | |
| (mm) | (MPa) | Min | ||||
| Q420B | ≤16 | 420 | 520-680 | 18 | 20 | 34 |
| >16-35 | 400 | 520-680 | 18 | 20 | 34 | |
| >35 | 380 | 520-680 | 18 | 20 | 34 | |
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