What tests can be used to distinguish the quality of Threaded Steel?

My company main: profile wholesale and retail, processing, steel production; Building panel wholesale and retail, main products: profile, galvanized profile, steel bar sales. Our company has more than 500 sets of moulds, which can meet your different choices of products. The factory has its own moulds to meet the different needs of customers. The company abides by the tenet of "customer first, quality first". Thanks to the assistance and support of friends from all walks of life, our company will continue to develop and grow. All the staff sincerely welcome customers from home and abroad to visit and seek common development.

We have been "excellent quality, timely delivery, reasonable price, good service" for the purpose of our customers; And is in line with the "quality of survival, reputation for development" production principle, won the majority of new and old customers praise. The company has advanced equipment and technology, scientific internal management and sound quality assurance system. The factory is based on sincerity and has a good reputation, which is trusted by domestic and foreign merchants. The products are exported to Southeast Asia, the Middle East, the United States, Japan, Africa and other regions.