304 stainless steel brand: 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.
304L is more resistant to corrosion and 304L contains less carbon.
304 widely used, with good corrosion resistance, heat resistance, low temperature strength and mechanical characteristics; Stamping bending and other hot processing good, no heat treatment hardening phenomenon (non-magnetic, using temperature -196°C~800°C).
304L has excellent resistance to grain boundary corrosion after welding or stress removal; In the absence of heat treatment, it can also maintain good corrosion resistance, and the service temperature is -196°C-800°C.
According to the process, it can be divided into two types: hot rolled and cold rolled. According to the structure characteristics of steel, it can be divided into five types: austenitic type, austenitic – ferritic type, ferritic type, martensitic type and precipitation-hardened type. Requirements can withstand oxalic acid, sulfuric acid-ferric sulfate, nitric acid, nitric acid-hydrofluoric acid, sulfuric acid-copper sulfate, phosphoric acid, formic acid, acetic acid and other acids corrosion, widely used in chemical, food, medicine, paper making, petroleum, atomic energy and other industries, as well as construction, kitchenware, tableware, vehicles, household appliances and all kinds of parts.
Stainless steel plate surface smooth, high plasticity, toughness and mechanical strength, acid, alkaline gas, solution and other media corrosion resistance. It is an alloy steel that does not rust easily, but not absolutely.
Stainless steel plate according to the method of hot rolled and cold rolled two kinds, including thickness 0.02-4 mm thin cold plate and 4.5-100 mm medium thick plate.
In order to ensure that the mechanical properties such as yield strength, tensile strength, elongation and hardness of all kinds of stainless steel plates meet the requirements, the steel plates must undergo annealing, solution treatment, aging treatment and other heat treatment before delivery. 05.10 18.104.22.168 Special symbol
Corrosion resistance of stainless steel mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and internal organizational structure, the main role is chromium element. Chromium has high chemical stability, can form passivation film on the surface of steel, so that the metal is isolated from the outside world, protect the steel plate from oxidation, increase the corrosion resistance of the steel plate. After the passivation film is destroyed, the corrosion resistance decreases.
Dry mill drawing
The most common filament and short silk on the market, 304 stainless steel plate after processing such surface, shows a good decorative effect, can meet the requirements of general decorative materials. Generally speaking, 304 stainless steel can form good results after a scrub. Due to the low cost, simple operation, low processing cost and wide application of this kind of processing equipment, it has become a necessary equipment for processing center. So most processing centers can provide long wire and short wire frosted board, 304 steel accounted for more than 80%.
Oil grinding wire drawing
304 series stainless steel after oil grinding reflects the perfect decorative effect, widely used in elevator, home appliances and other decorative panels. Cold rolled 304 stainless steel can generally achieve good results after a scrub pass, there are some processing centers on the market can provide hot rolled stainless steel oil scrub processing, its effect and cold rolled oil grinding comparable. Oil-based drawing also has long silk and short silk. Elevator decoration generally uses filament, and all kinds of small household appliances, kitchenware and other two kinds of grain have a choice