Our company was established in 1994 with the name of Dongying Haixin Metal Product Co.,Ltd.Then,it was renamed into Dongying Zhengda Metal Proudct Co.,Ltd in 2001. At the very beginning , we mainly do machining parts.With the continual development, the company has grown into an integration of precision casting,machining,metal surface treatment. We specialize in casting and machining of stainless steel,carbon steel and alloy steel. There are four series,such as pipe fitting,construction hard...View More