Austenitic stainless steel compared to carbon steel, having the following characteristics: 1) high electrical female ratio is about five times the carbon steel. 2) a large linear expansion coefficient, 40% larger than carbon steel, and as the temperature rises, the value of linear expansion coefficient of stainless steel screws also increased accordingly. 3) low thermal conductivity, about 1/3 of steel. In particular to make it is that the magnetic 304 stainless steel due to the above reasons, stainless steel and other materials, such as 430, magnetic steel is not at the same level, ie 304 magnetic always shows weak magnetism. This tells us that if the weak magnetic stainless steel or entirely without magnetic, should be 304 or 316 is determined; if the magnetic steel of the same, showing ferromagnetic, because discrimination is not 304. Martensitic stainless steel: 410 and 416 can be heat strengthened, hardness 35 ~ 45HRC, stainless steel screw bolt Jinan, good machining performance, for general purpose corrosion resistant stainless steel screws. 416 higher sulfur content, is cutting stainless steel. 420, Jinan stainless steel screws and nuts, sulfur content? R0.15%, Jinan stainless steel screws, mechanical performance improvement can be heat strengthened, Jinan stainless steel screws screws, maximum hardness 53 ~ 58HRC, for applications requiring high strength stainless steel screws. Precipitation hardening stainless steel: 17-4PH, PH15-7Mo, they can get more than the usual 18-8 stainless steel higher strength, it has been used for high-strength, corrosion-resistant stainless steel screws. Jinan stainless steel screws, Jinan Road ground, Jinan stainless steel screws provided by Jinan Daoqin Trading Company. Jinan stainless steel screws, Jinan Road ground, Jinan, Shandong Jinan Road ground stainless steel screws Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) this year introduced a new upgrade, the above picture is for reference only, please dial this page Phone or pictures on obtain the latest information, contact: Chuan-use.