316 and 317, Jining, Shandong stainless steel screws, they all contain the alloying elements Mo, Jinan, Shandong stainless steel screws, so their high-temperature strength and corrosion resistance than 18-8 stainless steel high. 321 and 347, Shandong stainless steel screws, 321 contain more stable alloying elements Ti, 347 type containing Nb, thereby increasing the resistance to intergranular corrosion of materials. Not annealed or stainless steel fasteners in 420 ~ 1013 ℃ after serving applies to welding. External causes produce stainless steel screw lock phenomenon :) urging angle in the wrong direction. In use, the nut must be perpendicular to the axis of stainless steel screws screwed one but it is easy to tilt lock. Material Category austenitic stainless steel: austenitic stainless steel is the most basic alloying elements chromium and nickel grades are typically about 18 percent chromium, nickel about 8% of the Cr-Ni austenitic stainless steel, often called as 18-8 stainless steel. The ratio of the element chromium and nickel to ensure the organization basically is stable austenitic steels. Jining, Shandong Jinan _ stainless steel screws Daoqin (Online) _ Shandong stainless steel screws provided by Jinan Daoqin Trading Company. Jinan Daoqin Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) Shandong Jinan, hardware accessories leader over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Jinan Road ground in leadership with the staff warmly welcome all inquiries negotiations to create the Jinan Daoqin better future.