Features of Q620D low alloy steel sheet
High toughness: When impacted or bent, Q620D high strength steel
plate can maintain good toughness and is not easy to break.
Impact resistance: Q620D high strength alloy steel can withstand
large impact loads to ensure the safety of the structure,
especially in a low temperature environment of -20℃, it can still
maintain good impact toughness.
Other properties: Q620D low alloy steel plate also has certain
corrosion resistance, wear resistance, and good welding and
processing performance.
Q620D high strength steel sheet is widely used in many fields such
as machinery manufacturing and engineering construction, such as
heavy industry machinery, engineering machinery, chemical
machinery, nuclear power equipment, bridge equipment, port
machinery, ship equipment, etc.
Q620E alloy steel plate is a low alloy high strength structural
steel plate with a wide range of applications and excellent
performance characteristics.
Q620E high tensile steel plate can still maintain good toughness
at low temperatures and has high impact energy. Q620E high
strength plate also has high wear resistance, impact resistance,
corrosion resistance, fatigue resistance and other properties, and
is easy to process.
Q620D Low-alloy Steel Plate Chemical Composition
| STEEL GRADE | C% max | Si% max | Mn% max | P% max | S% max | Cu% max | Cr% max | Ni% max | Mo % max | B % max | V % max | Nb% max | Ti % max |
| Q620D | 0.2 | 0.80 | 1.7 | 0.02 | 0.010 | 0.5 | 1.5 | 2 | 0.70 | 0.005 | 0.12 | 0.06 | 0.05 |
Q620D High-strength Steel Plate Mechanical Property
| STEEL GRADE | Re yield strength Mpa min | Re yield strength Mpa min | elongation % | Energy and temperature |
| Min | 0 | -20 | -40 | -60 |
| Q620D | t≤50 | 50-100 | 100-150 | t≤50 | 50-100 | 100-150 | | J | J | J | J |
| 620 | 580 | 560 | 700-890 | 700-890 | 650-830 | 15 | 47 | 47 | 34 | 34 |
►Mechnical property for GB/T Q620E hsla steel sheet
| Thickness(mm) | Yield strength (≥Mpa) | Tensile strength (Mpa) | Elongation in ≥, A % |
| T≤50 | 620 | 700-890 | 15 |
| 50<T≤100 | 580 | 700-890 |
| 100<T | 560 | 650-830 |
►Chemical composition for GB/T Q620E high strength alloy steel
| C | Si | Mn | P | S | Cu | Cr |
| 0.20 | 0.80 | 1.70 | 0.020 | 0.010 | 0.50 | 1.50 |
| Ni | Mo | B | V | Nb | Ti | - |
| 2.00 | 0.70 | 0.005 | 0.12 | 0.06 | 0.05 | - |
