1Cr18Ni9Ti austenitic type is the most widely used, suitable for food, chemical, pharmaceutical, and atomic energy industries.
0Cr25Ni20 austenitic furnace material, material for automobile exhaust purification device.
The 1Cr18Ni9 austenitic type has high strength after cold working and is used as a decorative part for construction.
0Cr18Ni9 austenitic type is the most widely used stainless heat-resistant steel, food equipment, general chemical equipment, and atomic energy industry.
00Cr19Ni10 austenitic type is used for outdoor machinery, building materials, heat-resistant parts, and parts with difficult heat treatment requirements in the chemical, coal, and petroleum industries that require high intergranular corrosion resistance.
0Cr17Ni12Mo2 austenitic type is suitable for use in seawater and other media, mainly as pitting-resistant materials, photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts.
00Cr17Ni14Mo2 austenitic type is an ultra-low carbon steel of 0Cr17Ni12Mo2, used for products with special requirements for resistance to intergranular corrosion.
1Cr18Ni12Mo2Ti austenitic type is used in equipment resistant to sulfuric acid, phosphoric acid, formic acid, and acetic acid, and has good intergranular corrosion resistance.
The austenite type of 0Cr18Ni12Mo2Ti is the same as above.
0Cr18Ni10Ti austenitic type with Ti added to improve resistance to intergranular corrosion and is not recommended for decorative parts.
0Cr16Ni14 austenitic non-magnetic stainless steel for electronic components.
The 0-1Cr20Ni14Si2 austenitic type has high-temperature strength and oxidation resistance and is more sensitive to sulfur-containing atmospheres. It has a tendency to embrittlement of precipitated phases at 600-800°C. It is suitable for making various furnace components under stress.
1Cr17Ni7 austenitic type is suitable for high-strength components and materials for train passenger cars.
00Cr18Ni5Mo3Si2 austenitic + ferrite has good stress corrosion cracking resistance and high strength. It is suitable for environments containing chloride ions. It is used in oil refining, fertilizer, papermaking, petroleum, chemical, and other industries, manufacturing heat exchangers, and condensation器等。
0Cr17(Ti) ferrite type is used for stamping parts of the washing machine inner tub and for decoration.
00Cr12Ti ferrite type is used for car muffler tube and decoration.
0Cr13Al ferrite type cooling from high temperature does not produce significant hardening, steam turbine material, quenching parts, composite steel.
1Cr17 ferrite-type general-purpose steel with good corrosion resistance, used in building interior decoration, heavy oil-burning parts, used in household appliances, household appliances parts.
0Cr13 ferrite type is used for parts with higher toughness and impact load, such as turbine blades, structural frames, bolts, nuts, etc.
The 1Cr13 martensitic type has good corrosion resistance and machinability and is used for general purposes, blade mechanical parts, petroleum refining devices, bolts, nuts, pump rods, tableware, etc.
The 2Cr13 martensitic type has high hardness and good corrosion resistance in the quenched state. It is used for steam turbine blades and tableware (knives).
Type 304 widely used material. It can withstand general rust in the building, resist the erosion of food processing media (but corrosion may occur in high-temperature conditions containing concentrated acids and chlorides), and resist organic compounds, dyes, and a wide variety of inorganic compounds. Type 304L (low carbon), good resistance to nitric acid, and durable medium temperature and concentration of sulfuric acid, widely used as liquid gas storage tanks, low-temperature equipment (304N), appliances and other consumer products, kitchen equipment, hospital equipment, transportation Tools, wastewater treatment equipment.
Type 316 contains slightly more nickel than type 304 and contains 2%-3% molybdenum. It has better corrosion resistance than type 304, especially in the chloride medium that tends to cause pitting corrosion. Type 316 has been developed as a sulfite pulp machine because it is durable in sulfuric acid compounds. Moreover, its use has expanded to handle many chemicals in the processing industry.
Type 317 contains 3%-4% molybdenum (the higher level obtained in this series), and contains more chromium than Type 316, which has a higher resistance to pitting and crevice corrosion.
Type 430 has a lower content of alloy than type 304. It is used for high-polishing decoration in a mild atmosphere, and can also be used as nitric acid and food processing equipment.
Type 410 has the lowest alloy content among the three general-purpose stainless sheets of steel. It is the choice of high-load bearing parts that require strength and corrosion resistance, such as solid parts. Type 410 is resistant to corrosion in the mild atmosphere, water vapor, and many mild chemical products.
Type 2205 is superior to Type 304 and Type 316 because it has high resistance to chloride stress corrosion cracking and has approximately twice the strength.
Stainless steel grade group
200 series-chromium-nickel-manganese austenitic stainless steel
300 series—chromium-nickel austenitic stainless steel
Model 301—good ductility, used for molded products. It can also be hardened by mechanical processing. Good weldability. Abrasion resistance and fatigue strength are better than 304 stainless steel.
Model 302—The corrosion resistance is the same as that of 304 because the carbon content is relatively high, the strength is better.
Model 303—It is easier to cut than 304 by adding a small amount of sulfur and phosphorus.
Model 304—general model; that is, 18/8 stainless steel. The GB grade is 0Cr18Ni9.
Model 309—Compared with 304, it has better temperature resistance.
Model 316-after 304, the second most widely used steel grade, mainly used in the food industry and surgical equipment, adding molybdenum to obtain a special corrosion-resistant structure. Because it has better resistance to chloride corrosion than 304, it is also used as “ship steel”. SS316 is usually used in nuclear fuel recovery devices. 18/10 grade stainless steel usually also meets this application level.
Model 321—Except for the addition of titanium to reduce the risk of corrosion of the material welds, other properties are similar to 304.
400 series-ferritic and martensitic stainless steel
Model 408—Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.
Model 409—the cheapest model (British and American), usually used as a car exhaust pipe, is a ferritic stainless steel (chrome steel).
Model 410—Martensite (high-strength chromium steel), with good wear resistance and poor corrosion resistance.
Model 416—Add sulfur to improve the processing performance of the material.
Model 420—”cutting tool grade” martensitic steel, similar to the earliest stainless steel such as Brinell high chromium steel. It is also used for surgical knives, which can be very bright.
Model 430—Ferritic stainless steel, for decoration, such as car accessories. Good formability, but poor temperature resistance and corrosion resistance.
Model 440—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 steel. The most common application example is the “razor blade”. There are three commonly used models: 440A, 440B, 440C, and 440F (easy processing type).
500 series-heat-resistant chromium alloy steel.
600 series—Martensitic precipitation hardening stainless steel.
Model 630—The most commonly used precipitation hardening stainless steel model, usually also called 17-4; 17% Cr, 4% Ni.