China's economy grew by 6.7% in the second quarter, the slowest pace in two years.
Zinc took another hammering, down by 3.6% to US$2502 per tonne, a fresh 13-month low.
Despite hitting a more than 10-year high earlier this year, zinc has been the worst performer of 2018, down by 25%.
Nickel dropped by 2.2% to $13,571/t, its lowest level since April.
Cobalt slumped by nearly 3.6% to $67,750/t, the lowest point since early December 2017.
The key battery metal is down by 28.5% since peaking at $94,800/t in March.
Lead and tin each dropped by more than 1%, while copper was down by 0.8%, with supply disruptions likely slightly supporting prices.
Aluminium was the only winner, up by 2%.
Oil prices slumped by 4.2% to below $70 a barrel, while gold remained steady at $1241 an ounce.
The Australian market is poised for a weak start with the SPI 200 Futures index trading 12 points down.