What material is the small metal watering can be made of?
List of various series of stainless steel
(The most commonly used series are 2XX/3XX/4XX)
2XX series-chromium-nickel-manganese series austenitic stainless steel;
3XX series-chromium-nickel series austenitic stainless steel;
4XX series-high chromium series ferritic steel and martensitic steel;
5XX series-low chromium heat-resistant steel series martensitic steel;
6XX series-precipitation hardening steel;
Introduction to the characteristics and applications of various grades of stainless steel
200 series stainless steel is a low-nickel high-manganese stainless steel with a nickel content of 4% to 6% and manganese content of about 8%. It is nickel-saving stainless steel. Because the resistance to intergranular corrosion and pitting corrosion is significantly lower than that of 300 series stainless steel, the biggest advantage of 200 series stainless steel is that it is cheaper than 300 series stainless steel. Under the premise of weak corruption;
202 stainless steel can almost completely replace 304 stainless steel. In addition, 200 series stainless steel has the non-magnetic characteristics of austenitic steel, and its appearance is similar to 304. In the market, there are often sub-strokes and fake “304” for sales;
202 stainless steel: Under the premise of weak corrosion, 202 stainless steel can almost completely replace 304 stainless steel, and is widely used in architectural decoration, municipal engineering, highway guardrails, hotel facilities, shopping malls, glass handrails, public facilities, and other places;
301 stainless steel: good ductility, used for forming products, can also be hardened through work, good weldability, wear resistance, and fatigue strength is better than 304 stainless steel;
302 stainless steel: the corrosion resistance is the same as that of 304, corresponding to the domestic brand 1Cr18Ni9. Because of the relatively high carbon content, the strength is better, and it is often used for building decorative parts;
303 stainless steel: It is free-cutting stainless steel containing sulfur and selenium. It is used for occasions that require easy cutting and a high surface finish. It is most suitable for automatic lathes, bolts, and nuts;
304 stainless steel: It is the most common material in stainless steel, with a density of 7.93 g/cm3. It is also called 18/8 stainless steel in the industry. It has high-temperature resistance of 800 degrees, good processing performance, and high toughness. It is widely used in industry and furniture decoration. Industry and food and medical industry;
309 stainless steel: Compared with 304, it has better temperature resistance. The steel factory produces more 309S stainless steel, which has better corrosion resistance and high-temperature resistance; it can withstand high temperatures of 980°C and is mainly used in boilers, chemical industries, and other industries. Compared with 309S, 309 does not contain sulfur S content.
316 stainless steel: After 304, the second most widely used steel grade. The addition of Mo has greatly improved its corrosion resistance and high-temperature strength. The high-temperature resistance can reach 1200-1300 degrees, which can be used in harsh conditions. Used under the conditions; corrosion resistance:
The corrosion resistance is better than 304 stainless steel, and it has good corrosion resistance in the production process of pulp and paper. And 316 stainless steel is also resistant to the erosion of the ocean and corrosive industrial atmosphere.
316 stainless steel national standard brand (06Cr17Ni12Mo2) has good oxidation resistance. In the range of 427°C-857°C (800°F-1575°F), it is best not to use 316 stainless steel continuously, but when 316 stainless steel is used continuously outside this temperature range, the stainless steel has good heat resistance;
316L stainless steel: the performance of resistance to carbide precipitation is better than that of 316 stainless steel, and the above temperature range can be used. The biggest difference in use is the ultra-low carbon of 316L, so when welding, 316L carbon is not easy to precipitate and combine with chromium to form chromium carbide, which can reduce the corrosion of the welded part;
321 stainless steel: except that the addition of titanium reduces the risk of corrosion of the material welds, other properties are similar to 304;
408 stainless steel: good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni;
409 stainless steel: the cheapest model (British and American), usually used as car exhaust pipe, is ferritic stainless steel (chrome steel);
410 stainless steel: martensite (high-strength chromium steel), good wear resistance, poor corrosion resistance;
416 stainless steel: added sulfur to improve the processing performance of the material. Free-cutting martensitic stainless steel can be strengthened by heat treatment. The strength and machinability of 416 are better than 304 and 316, the friction coefficient is small, the stainless steel has low carbon content and corrosion resistance. Good performance, but the corrosion resistance is not as good as 304 and 316;
420 stainless steel: “cutting tool grade” martensitic steel, with certain wear resistance and corrosion resistance, high hardness, etc., similar to the earliest stainless steel such as Brinell high chromium steel. It is also used for surgical knives, which can be very bright. 420 stainless steel is suitable for all kinds of precision machinery, bearings, electrical, equipment, instruments, meters, transportation tools, household appliances, etc. It is mostly used to manufacture parts that are resistant to atmospheric, water vapor, water, and oxidizing acid corrosion;
430 stainless steel: Ferritic stainless steel, general-purpose steel with good corrosion resistance, better thermal conductivity than austenite, thermal expansion coefficient smaller than austenite, heat fatigue resistance, added stabilizing element titanium, mechanical welding Good performance. 430 stainless steel is used for automobile accessories, building decoration, fuel burner parts, household appliances, and home appliance parts;
430F stainless steel: a steel grade with free-cutting performance added to 430 steel, mainly used for automatic lathes, bolts, and nuts, etc.;
440 stainless steel: high-strength cutting tool steel with slightly higher carbon content. After proper heat treatment, higher yield strength can be obtained. The hardness can reach 58HRC, which is among the hardest stainless steels. The most common application example is “razor blades”. There are three commonly used models: 440A, 440B, 440C, and 440F (easy processing type);
443 stainless steel: It is a kind of ferritic stainless steel. It is now generally used to replace 304. Its rust resistance and processing performance are equivalent to 304. It is currently widely promoted in the fields of electrical appliances, utensils, kitchen equipment, elevators, ovens, etc.;
500 series: heat-resistant chromium alloy steel;
600 series: martensitic precipitation hardening stainless steel;
630: The most commonly used precipitation hardening stainless steel model, usually also called 17-4; 17% Cr, 4% Ni;
It can be seen from the above list that when you shop for a watering can, the grade of the corresponding material can tell what material your watering can is made of.
