AIH Fund I, under the management of private equity fund manager AIH Capital, has closed a second deal with High Duty Castings (HDC), resulting in the fund now owning 49% of the manufacturing company. HDC is a producer of grey iron castings for industry specific products, such as pumps and valves, gearboxes, engineering compressors and hydraulics and bearings, as well as components for use in the automotive, agriculture and railway sectors.