Recently, the locking shaft of damping valve used in auto shock absorber system is manufactured by Shanghai Yugoo Fastening Systems Co., Ltd, which has passed the auditing and verification of Tenneco (Beijing) Automobile Shock Absorber Co., Ltd and become a qualified supplier. The locking shaft of damping valve is made of Baosteel wire rod and the quality performance of products is good. It is the first time for Tenneco to manufacture auto damping fasteners products adopting domestic wire rod, which marks that Baosteel wire rod has successfully entered the market for high-end components of auto shock absorber.

Tenneco is the world's largest automobile shock absorber manufacturer. The annual production of Tenneco only in Beijing plant reaches 8 million, and it has several overseas plants with a similar scale which have annual production of above a hundred million pieces. Shanghai Yugoo mainly produces high-end automotive fasteners for Europe, US and Japan and all the materials are imported, which has a long-term cooperative relationship with Tenneco.

In 2013, facing the business situation of intensifying market competition, Baosteel Metal set up a value chain optimization project in the form of subject, ranging from operation department of steel bar products in Baosteel Co.,Ltd business unit of steel tube and steel bar, Central Research Institute to operation center for Baosteel metal products and Baori Wire Products. And they worked together to overcome difficulties and tried to break the monopoly pattern of overseas steel plants in providing components of auto shock absorber. The subordinate of Baosteel Metal- Baosteel Metal Trade optimized the drive mode of market competition ability, gave full play to the brand advantage of Baosteel, properly cut-over Shanghai Yugoo with corresponding product projects of Tenneco, and fully combined various superior resources of all business units which participated in tackling problems to break technical bottleneck and successfully overcome several difficulties. Eventually, the locking shaft of damping valve using Baosteel wire rod won the recognition of Tenneco.

Meanwhile, Baosteel Metal Trade effectively cooperated on the project involved in process equipment level of each production unit, and all participation units focused technical force to give supports, ensuring the smooth completion of this project. In addition, because the locking shaft of damping valve was industrial product, its materials and specification can not be changed and it was difficult to find materials conforming to the requirements of wire diameter in Baosteel. Baori Wire Products had an emergency response which made a breakthrough in ultimate drawing force, and wire rod with 7.5 mm diameter was successfully pulled to 6.3 mm, making project samples have a breakthrough. During the manufacturing process in Shanghai Yugoo plant, Baosteel wire rod and foreign wire rod had different degrees of surface microcrack and burr. Steelmaking factory of Central Research Institute actively participated in providing solutions, and repeatedly tested data and explored mechanism through deep investigation of user field, which provided a strong support for Baosteel wire rod to win out over foreign wire rod.

It is reported that as the locking shaft of damping valve manufactured by Shanghai Yugoo has successfully passed the authentication of Tenneco, the future prospect of sales market for Baosteel wire rod and Baori Wire Products with drawing force is promising.




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