22 stainless steel pipe belongs to an important classification of stainless steel pipe. Although it seems difficult to distinguish from the product design, its performance is actually relatively special. This can be analyzed with reference to the effect and advantages of the practical application plate. For example, the knowledge popularized today includes the distinction between stainless steel 34 and stainless steel 22. For friends who have purchase plans or want to know more about this aspect, it is still of reference value.
1. Price of 22 stainless steel pipe
1. Starting price of Tianjin Tianzhu Weiye spot stainless steel pipe 316L
Minimum order price: RMB 13
Minimum order quantity: 1kg
Material: stainless steel
Warehouse: Tianjin
. 6*12 square tube? 5
Starting price: RMB 221
MOQ: 1 ton
Material: Q235
Warehouse: Tianjin Daqiuzhuang
Warehouse Address: Tianjin Daqiuzhuang
Company Name: Tianjin Changyu Steel Pipe Co., Ltd.
II. 22 stainless steel pipes
Environmental protection stainless steel includes none. The application demand analysis of stainless steel pipes in various industrial fields is applied to automobile industry/petrochemical industry, including chemical fertilizer industry/fluid transportation/equipment manufacturing such as water and gas, and
physical properties
22 and corresponding 3? Physical properties of series steel in solution treatment state, 2? Department and 3? There is not much difference in the physical properties of the system, which is almost equivalent. However, the change of magnetic permeability after cold working is different, and the increase of magnetic permeability is smaller than that of 2 series and 3 series because of the different degree of martensite mutation during cold working.
mechanical properties
21, 22? With other 2? The material is different from that of 31,32? All of them belong to metastable austenitic stainless steel, which has great work hardening property. Work hardening curves of these steels. 21? With 31? And? 22? In 32? Have similar hardening characteristics. 21，31? Work hardening is greater. The amount of martensite produced varies from brand to brand, 22,34? Martensite is rarely produced, and work hardening mainly depends on deformity. 24、24L? The following steel grades, work hardening almost all rely on distortion. CrMnN? See table for the mechanical properties and magnetic permeability of the series materials. 5。 The hardness of these steels in solution treatment state is HV25? About, the strength is higher after cold rolling strengthening, Hv? Achievable? 5, but the magnetic permeability is still lower than? 1.5。
III. What's the difference between stainless steel 34 and stainless steel 22
The chemical composition is different. The nickel content of 34 is much higher than that of 22.
34 stainless steel is a common material in stainless steel, with a density of 7.93? G/cm3, also known as 18/8 stainless steel in the industry. High temperature resistance of 8 degrees, good processability and high toughness, widely used in industry, furniture decoration industry and food and medical industry. The common marking methods in the field are Cr18Ni9 and SUS34.
22 stainless steel is one of the 2 series stainless steels, and the national standard model is 1Cr18Mn8Ni5N. 2 series stainless steel belongs to low nickel and high manganese stainless steel, with nickel content and manganese content of about 8%, which is a nickel-saving stainless steel.
Distinguishing method:
1. Color difference:
After pickling, the surface color of stainless steel is silvery white and smooth: the color of chromium-nickel stainless steel is silvery white and jade; Chrome stainless steel is white and slightly grayish; The color of Cr-Mn-N stainless steel is similar to that of Cr-Ni stainless steel. Surface color of stainless steel without pickling: Cr-Ni steel is brownish white; Chrome steel is brown-black; Chromium, manganese and nitrogen are black (these three colors refer to the colors with heavy oxidation). Cold-rolled non-annealed Cr-Ni stainless steel with silvery white and reflective surface. Stainless steel, except Yuangang, is generally white after pickling.
2. Identification with copper sulfate:
The method is to remove the oxide layer on the steel, put a drop of water on it and rub it with copper sulfate. If it does not change color after rubbing, it is generally stainless steel; Such as purple: high manganese steel is nonmagnetic, and ordinary steel or low alloy steel is magnetic.
3. Identification with magnet:
Magnets can basically distinguish two types of stainless steel. Because chromium stainless steel can be attracted by magnets in any state; Chromium-nickel stainless steel is generally nonmagnetic in the annealed state, and some will be magnetic after cold working. But high manganese steel with high manganese content is nonmagnetic; The magnetic situation of Cr-Ni-N stainless steel is more complicated: some are nonmagnetic, some are magnetic, and some are nonmagnetic in the longitudinal direction and magnetic in the transverse direction. Therefore, although magnets can basically distinguish chromium stainless steel from chromium-nickel stainless steel, they can't correctly distinguish some special steel grades, let alone specific steel grades
There are a lot of knowledge introduced above, including the differences and comparison between stainless steel 34 and stainless steel 22, in addition to the methods and skills of screening and analysis in the actual purchase process. For most non-professionals, The above content based on various performance plates of stainless steel 34 and stainless steel 22 is also of great value. What we need to do is to refer to the actual situation, and help with analysis and purchase selection with the help of tools and products when necessary.
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