Eight-wheel all-metal solid bottom gondola car of model 12-2104 having bottom with rounded corners is used for transportation of inert non-pulverized bulk and lump materials not requiring protection from the weather on railroads of 1520 mm gauge. The car is suitable for unloading on car dumpers. The car can also be used for hauling stack or piece freight if secured in accordance with the loading rules. All-metal carbody with no drop doors has sides and ends rounded at the bottom, which allows unloading the car with minimum waste of lading.