304 stainless steel grade: 0Cr18Ni9 (0Cr19Ni9) 06cr19ni9 s30408
Chemical composition: C: ≤ 0.08, Si: ≤ 1.0, Mn: ≤ 2.0, Cr: 18.0 ~ 20.0, Ni: 8.0 ~ 10.5, s: ≤ 0.03, P: ≤ 0.035, n ≤ 0.1.
According to the preparation method, it can be divided into hot rolling and cold rolling. According to the structural characteristics of steel grade, it can be divided into 5 categories: Austenitic type, AUSTENITIC FERRITIC type, ferritic type, martensitic type and precipitation hardening type. It is required to be able to withstand the corrosion of oxalic acid, sulfuric acid iron sulfate, nitric acid, nitric acid hydrofluoric acid, sulfuric acid copper sulfate, phosphoric acid, formic acid, acetic acid and other acids. It is widely used in chemical industry, food, medicine, papermaking, petroleum, atomic energy and other industries, as well as various parts of buildings, kitchenware, tableware, vehicles and household appliances.
stainless steel plate has smooth surface, high plasticity, toughness and mechanical strength, and is resistant to corrosion of acid, alkaline gas, solution and other media. It is a kind of alloy steel that is not easy to rust, but it is not ************************************************************.
stainless steel plate can be divided into hot rolling and cold rolling according to the manufacturing method, including thin cold plate with thickness of 0.02-4 mm and medium thick plate with thickness of 4.5-100 mm.
In order to ensure that the mechanical properties such as yield strength, tensile strength, elongation and hardness of various stainless steel plates meet the requirements, the steel plates are subject to annealing, solution treatment, aging treatment and other heat treatments before delivery
The corrosion resistance of stainless steel mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and internal structure. Chromium plays a major role. Chromium has high chemical stability, can form a passive film on the steel surface, isolate the metal from the outside, protect the steel plate from oxidation and increase the corrosion resistance of the steel plate. After the passivation film is destroyed, the corrosion resistance decreases.
