Zhejiang Jinxin Stainless Steel Manufacture Co., Ltd. was established in March 2005. It is located in Songyang County Industrial Park. It is connected to the Longli Line (50 Provincial Highway) of the First Class Highway and the Longli Expressway in the south. The traffic is very convenient. The company occupies an area of 60 mu and has a fixed asset investment of more than 54....
Steel is an iron-carbon alloy containing between 0.04% and 2.3% carbon. We usually refer to it as iron and steel, with a melting point of 1515 degrees. In order to ensure its toughness and plasticity, the carbon content generally does not exceed 1.7%. In addition to iron and carbon, the main elements of steel include silicon, manganese, sulfur, phosphorus, etc., which refer to iron-carbon alloys containing less than 2% carbon. According to different ingredients, it can be divided into carbon steel and alloy steel. According to performance and use, it can be divided into structural steel, tool steel and special performance steel. There are various methods for classifying steel. The main methods are as follows: 1.
Chromium is the basic element for obtaining corrosion resistance of stainless steel (all stainless steel elements have a common characteristic, that is, the chromium content is above 10.5%). When the chromium content in steel reaches about 12%, chromium and The action of oxygen in the corrosive medium forms a very thin oxide film (self-passivation film) on the steel surface, which prevents further corrosion of the steel matrix. In addition to chromium, commonly used alloying elements are nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the requirements of stainless steel structure and performance for various purposes. Stainless steel is usually divided into matrix structures: 1. Iron
1. Carbon (C): The carbon content in the steel increases, the yield point and tensile strength increase, but the plasticity and impact resistance decrease. When the carbon content exceeds 0.23%, the weldability of the steel deteriorates, so it is used for welding. For low-alloy structural steels, the carbon content generally does not exceed 0.20%. High carbon content also reduces the atmospheric corrosion resistance of steel. High carbon steel in the open yard is susceptible to corrosion; in addition, carbon can increase the cold brittleness and age sensitivity of steel. 2, silicon (Si): in the steelmaking process, adding silicon as a reducing agent and deoxidizer, so the killed steel contains 0.15-0.3
1. Yield point (σs) When the steel or sample is stretched, when the stress exceeds the elastic limit, even if the stress does not increase any more, the steel or the sample continues to undergo significant plastic deformation, which is called yielding and yielding. The minimum stress value at the time of the phenomenon is the yield point. Let Ps be the external force at the yield point s, Fo be the sample cross-sectional area, then the yield point σs = Ps/Fo(MPa), MPa is called MPa equal to N (Newton)/mm2, (MPa=106Pa, Pa: Pascal =N/m2) 2. Yield strength (σ0.2)&n