On 7 April, 2008, CNR was awarded a contract of supply 720 type C80B(H) Stainless Steel Coal Open-Top Wagon for Datong-Qinhuangdao line. The wagons will be built by CNR Qiqihar Railway Rolling Stock (Group) Co., Ltd. Up to now, CNR Qiqihar has got orders of 1,680 sets in 2008.
C80B rotary open-top wagons are used for unit-train coal transportation, which are suitable for heavy haul and quick unloading by special car-dumpers (three cars may be unloaded together with a special car-dumper without uncoupling). The car body are made of stainless steel and has the advantage of light in weight. It consists of tub mainframe featuring stub sills and high strength side sills, and side walls are reinforced with side posts in greater density. Transverse connecting rods are provided between bottom side walls at the area between side walls and tub opening.
The cars are assembled with 25t axle load low traction force three-piece bogies and AAR F type interlock rotary coupler and fixed couplers.
