Machine screw (1) Slotted cheese head screws: GB65 / DIN84 (2) Slotted pan head screws: GB67 / DIN85 (3) Slotted countersunk head screws: GB68 / DIN963 (4) Slotted flat head screws (5) Cross recessed small pan head screws: GB823 (6) Cross recessed flat head screw (7) Cross recessed pan head screws: GB818 / DIN7985 (8) Cross recessed countersunk head screws: GB819 / DIN965 (9) Cross recessed head screws : GB820 / DIN966 316 and 317, which contain alloying elements Mo, Zhangqiu stainless steel rings, screws, so their high-temperature strength and corrosion resistance than 18-8 stainless steel high. 321 and 347, 321 contain a more stable alloy elements Ti, Linyi stainless steel rings, screws, 347 type containing Nb, stainless steel rings, screws, thereby increasing the resistance to intergranular corrosion of materials. Not annealed or stainless steel fasteners in 420 ~ 1013 ℃ after serving applies to welding. One of the mechanical properties of stainless steel or heat resistant steel plate regardless of overall performance austenitic steel has the best of both adequate strength, have excellent hardness plastic while not high, and this is the reason they are widely used . The vast majority of austenitic stainless steel with other materials like metal, its tensile strength, yield strength and hardness, Weifang stainless steel rings, screws, along with decreasing temperature; plasticity is reduced as the temperature decreases. The tensile strength increase in the temperature range of 15 ~ 80 ° C is relatively uniform. More importantly: stainless steel screws with decreasing temperature, slowly reducing its impact toughness, there is no brittle transition temperature. So stainless steel at low temperature to maintain sufficient plasticity and toughness. Zibo stainless steel rings, stainless steel rings, screws screws _ _ Jinan Road ground (view) provided by Jinan Daoqin Trading Company. Jinan Daoqin Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) is a professional, "304 series stainless steel screws, nuts, washers, retaining rings, cotter pins, miniature" of the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "Road ground Dongming" brand has a good reputation. We adhere to the "service first, customer first" principle, so Jinan Road ground to win the trust of customers in the metal parts in the congregation, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!