GB/T 16270 Q620D low alloy steel plate has good strength, plasticity and toughness, good weldability and hot and cold pressing processing performance, and good corrosion resistance.
Q620D steel is mainly used in the manufacture of mechanical devices and other structural parts, such as drilling rigs, electric shovels, power-driven wheel counter mining trucks, mineral products cars, excavators, loaders, etc.
China GB/T16270 Q620D Low-alloy High-strength Steel Plate Chemical Composition and Mechanical Property:
| 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 |
| STEEL GRADE | Re yield strength Mpa min | Re yield strength Mpa min | elongation % | Energy and temperature | |||||||
| Min | 0 | -20 | -40 | -60 | |||||||
| t≤50 | 50-100 | 100-150 | t≤50 | 50-100 | 100-150 | J | J | J | J | ||
| Q620D | 620 | 580 | 560 | 700-890 | 700-890 | 650-830 | 15 | 47 | 47 | 34 | 34 |
