我们公司成立于1994年，其前身是东营海信金属制品有限公司并于2001年更名为东营正大金属制品有限公司，公司成立初期专业从事机械加工。随着公司的不断发展，逐步成长为集精密铸造、机械加工、金属表面处理于一体的综合企业，专业从事不锈钢、碳钢、合金钢及有色金属的铸造和加工业务。 产品涉及水暖管件、建筑装饰五金、船用五金、机械零件等四大系列，主要销往美国、西班牙、德国、日本、韩国、等国家和地区。
公司技术力量雄厚，拥有一支经验丰富的生产队伍，可根据图纸、样件或客户需求提供从开发设计、精密铸造、机械加工到表面处理的全过程服务。
我们以“诚信务实、互利共赢”为经营宗旨，竭诚欢迎国内外客户来人来涵，洽谈业务，我们将为您提供优质、的服务。
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,alloy steel and non-ferrous metal. There are four series,such as pipe fitting,construction hardware,marine hardware and machining parts. Our products are exported to U.S.A ,Spain, Germany, Japan, South Korea, Taiwan etc.
The company has advanced technology and an experienced working team.We can provide process sevice from design, investment casting ,machining to surface treatment  according to the drawings,  samples or customer’s special requirements.
We Wholeheartedly welcome the domestic and oversea customers to visit and cooperate with us. We will serve you with high quality and effeciency.