GB / T 16270 Q620D low alloy steel phaj muaj lub zog zoo, plasticity thiab toughness, zoo weldability thiab kub thiab txias pressing kev ua tau zoo, thiab zoo corrosion kuj.
Q620D steel feem ntau yog siv rau hauv kev tsim cov cuab yeej siv tshuab thiab lwm yam khoom siv, xws li drilling rigs, hluav taws xob shovels, lub zog tsav log counter mining tsheb, pob zeb khoom tsheb, excavators, loaders, thiab lwm yam.
Tuam Tshoj GB / T16270 Q620D Low-alloy High-strength Steel Phaj Chemical Composition thiab Mechanical Property:
| STEEL Qib | C% max | Si% max | Mn% max | P% max | S% max | Cu% max | Cr% max | Nia% max | Mo% max | B% max | V% max | Nb% max | % 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 Qib | Re yield zog Mpa min | Re yield zog Mpa min | elongation% | Zog thiab kub | |||||||
| Min | 0 | -20 | -40 | -60 | |||||||
| t Tsawg dua lossis sib npaug li 50 | 50-100 | 100-150 | t Tsawg dua lossis sib npaug li 50 | 50-100 | 100-150 | J | J | J | J | ||
| Q620D | 620 | 580 | 560 | 700-890 | 700-890 | 650-830 | 15 | 47 | 47 | 34 | 34 |
