Types of stainless steel

316L: Mo (2-3%) is added to the steel, resulting in excellent corrosion resistance and high-temperature strength； 316L has a lower carbon content than 316; therefore, its resistance to intergranular corrosion is better than that of 316 ； It has high high-temperature creep strength. It can be used under harsh conditions, has good work hardening properties, and is non-magnetic. The maximum carbon content of 316L stainless steel is 0.03; it can be used in applications where annealing is not possible after welding and where maximum corrosion resistance is required. Its corrosion resistance is better than that of 304 stainless steel. 304 is a general-purpose stainless steel

A lot has been said about 316L above. But I really don’t know anything about 314, as mentioned by the original poster.

304: 0Cr18Ni9; 304L: 00Cr19Ni10; 316: 0Cr17Ni12Mo2; 316L: 0Cr17Ni14Mo2. For more details, please refer to the basic knowledge of stainless steel at http://bbs.hcbbs.com/viewthread.php?tid=21157&highlight=%B2%BB%D0%E2%B8%D6%BB%F9%B1%BE%D6%AA%CA%B6

This post was last edited by zhchty on 2009-5-21 10:13. Sequence Number: China, Japan, United States, United Kingdom, Germany, France. 1: 1Cr18Mn8Ni5N, SUS202, 202,S20200, 284S16, X12CrNi177, Z12CN17.07; 2: 1Cr17Ni7, SUS301, 301,S30100, 301S21, X12CrNi188, Z10CN18.09; 3: 1Cr18Ni9, SUS302, 302,S30200, 302S25, X5CrNi189, Z6CN18.09; 4: 0Cr18Ni9, SUS304, 304,S30300, 304S15, X2CrNi189, Z2CN18.09; 5: 00Cr19Ni10, SUS304L, 304L,S30403, 304S12, Z5CN18.09A2; 6: 0Cr19Ni9N, SUS304N1, 304N, S30451, X2CrNiN1810, Z2CN18.10N; 7: 00Cr18Ni10N, SUS304LN, X5CrNi1911, Z8CN18.12; 8: 1Cr18Ni12, SUS305, 305,S30500, 305S19; 9: 0Cr23Ni13, SUS309S, 309S,S30908; 10: 0Cr25Ni20, SUS310S, 310S,S31008, X5CrNiMo1812, Z6CND17.12; 11: 0Cr17Ni12Mo2, SUS316, 316,S3160, 316S16, X2CrNiMo1812, Z2CND17.12; 12: 00Cr17Ni14Mo2, SUS316L, 316L,S31603, 316S12; 13: 0Cr17Ni12Mo2N, SUS316N, 316N,S31651; 14: 00Cr18Ni14Mo2Cu2, SUS316JlL; 15: 0Cr19Ni13Mo3, SUS317, 317,S31700, 317S16, X2CrNiMo1816, Z2CN19.15; 16: 00Cr19Ni13Mo3, SUS317L, 317L,S31703, 317S12, X10CrNiTi189; 17: 1Cr18Ni9Ti; 18: 0Cr19Ni10Ti, SUS321, 321,S32100, 321S12, 321S20, X10CrTi189, Z6NT18.10; 19: 0Cr18Ni11Nb, SUS347, 347,S34700, 347S17, X10CrNiNb189, Z6NNb18.10; 20: 0Cr13Al, SUS405, 405,S40500, 405S17, X71CrAl13, Z6CA13; 21: 1Cr17, SUS430, 430,S43000, 430S15, X8Cr17, Z8C17; 22: 00Cr27Mo, SUSXM27, XM27,S44625, Z01CD26.1; 23: 1Cr12, SUS403, 403,S40300, 403S17; 24: 1Cr13, SUS410, 410,S41000, 410S21, X10Cr13, Z12C13; 25: 0Cr13, SUS410S, 410S, 403S17, X7Cr13, Z6C13; 26: 1Cr13Mo, SUS410J1; 27: 2Cr13, SUS420J1, 420,S42000, 420S37, X20Cr13, Z20C13; 28: 3Cr13, SUS420J2, 420S45, Z15CN16.02; 29: 1Cr17Ni2, SUS431, 431,S43100, 431S29, X22CrNi17; 30: 7Cr17, SUS440A, 440,S44002; 31: 8Cr17, SUS440B, 440,S44003, Z100CD17; 32: 9Cr18, SUS440C, 440C, X105CrMo17, Z6CNU17.04; 33: 0Cr17Ni4Cu4Nb, SUS630, 603,S17400, Z8CNA17.7; 34: 0Cr17Ni7Al, SUS631, 631,S17700, X7CrNiAl177. Take your time reading it

Approximate comparison table of stainless steel grades at home and abroad No. China GB Taiwan, China CNS Japan JIS United States ASTM Germany DIN Austenitic stainless steels 1 1Cr17Mn6Ni5N 201 SUS201 201 2 1Cr18Mn8Ni5N 202 SUS202 202 3 1Cr17Ni7 301 SUS301 301 1.4301 4 1Cr18Ni9 302 SUS302 302 5 Y1Cr18Ni9 303 SUS303 303 6 Y1Cr18Ni9Se 303Se SUS303Se 303Se 7 0Cr19Ni9 304 SUS304 304 1.4301 (0Cr18Ni9) 304H 8 00Cr19Ni10 304L SUS304L 304L 1.4306 (00Cr18Ni10) 9 0Cr19Ni19N 304N1 SUS304N1 304N 10 0Cr19Ni10NbN 304N2 SUS304N2 XM21 11 00Cr18Ni10N 304LN SUS304LN 304LN 12 1Cr18Ni12 305 SUS305 305 (1Cr18Ni12Ti) 13 0Cr23Ni13 309S SUS309S 309S 14 0Cr25Ni20 310S SUS310S 310S 1.4845 (1Cr25Ni20Si2) 15 0Cr17Ni12Mo2 316 SUS316 316 1.4401 16 0Cr18Ni12Mo2Ti 316Ti 17 00Cr17Ni14Mo2 316L SUS316L 316L 1.4435 18 00Cr17Ni12Mo2N 316N SUS316N 316N 19 00Cr17Ni13Mo2N 316LN SUS316LN 316LN 20 00Cr18Ni12Mo2Cu2 316J1 SUS316J1 21 00Cr18Ni14Mo2Cu2 316J1L SUS316J1L 22 0Cr19Ni13Mo3 317 SUS317 317 1.4436 23 1Cr18Ni12Mo3Ti 24 0Cr18Ni12Mo3Ti 25 00Cr19Ni13Mo3 317L SUS317L 317L 1.4435 (00Cr17Ni14Mo3) 26 0Cr18Ni16Mo5 317J SUS317J1 27 1Cr18Ni9Ti 321 SUS321 321 1.4541 28 0Cr18Ni11Ti 321 SUS321 321 (0Cr18Ni9Ti) 29 0Cr18Ni11Nb 347 SUS347 347 1.4558 30 0Cr18Ni9Cu3 XM7 SUSXM7 XM7 (302HQ) 31 0Cr18Ni13Si4 XM15J1 SUSXM15J1 XM15 32 0Cr26Ni5Mo2 329J1 SUS329J1 329 Ferritic stainless steels 33 0Cr13AL 405 SUS405 405 34 00Cr12 410L SUS410L 1.4002 35 1Cr17 430 SUS430 430 1.4016 36 YCr17 430F SUS430F 430F 37 1Cr17Mo 434 SUS434 434 38 00Cr30Mo2 447J1 SUS447J1 39 00Cr27Mo XM27 SUSXM27 XM27 Martensitic stainless steels 40 1Cr12405 403 SUS403 403 41 0Cr13410 405 SUS405 405 42 1Cr13 410 SUS410 410 1.4024 43 1Cr13416Mo 410J1 SUS410J1 44 Y1Cr13420 416 SUS416 416 45 2Cr13 420J1 SUS420J1 420 46 3Cr13 420J2 47 4Cr13 48 Y3Cr13 420F SUS420F 420F 49 1Cr17Ni2 431 SUS431 431 50 7Cr17 440A SUS440A 440A 51 8Cr17 440B SUS440B 440B 52 11Cr17(9Cr18) 440C SUS440C 440C 53 Y11Cr17 440F SUS440F 440F 　

Let’s talk about several types of stainless steel: 301, 17Cr-7Ni-low carbon. Compared to 304 steel, it contains less Cr and Ni; its tensile strength and hardness increase upon cold working. It is non-magnetic, but becomes magnetic after cold working. Trains, aircraft, conveyor belts, vehicles, bolts, nuts, springs, screens. 301L 17Cr-7Ni-0.1N–low carbon: This grade is based on 301 steel, with a reduced carbon content to improve the resistance of welds to intergranular corrosion ； By adding nitrogen, the insufficient strength caused by the decrease in carbon content is compensated to ensure the strength of the steel. Railway vehicle frames and exterior decorative materials: 304 18Cr-8Ni is a widely used steel that possesses good corrosion resistance, heat resistance, low-temperature strength, and mechanical properties ； It has good hot workability for stamping, bending, etc., and shows no hardening due to heat treatment (non-magnetic, operating temperature range: -196°C to 800°C). Household items (tableware of types 1 and 2, cabinets, indoor piping, water heaters, boilers, bathtubs); auto parts (windshield wipers, mufflers, molded products); medical devices; building materials; chemicals; food industry; agriculture; ship components. 304L 18Cr-8Ni-low carbon: As a low-C version of 304 steel, it has corrosion resistance similar to that of 304 steel under normal conditions; however, it exhibits excellent resistance to intergranular corrosion after welding or stress relief ； It maintains good corrosion resistance even without heat treatment, and can be used at temperatures ranging from -196°C to 800°C. Used in outdoor machinery in the chemical, coal, and petroleum industries where high resistance to intergranular corrosion is required, as well as in heat-resistant building materials and parts for which heat treatment is difficult. 304Cu 13Cr-7.7Ni-2Cu: The addition of Cu improves its formability, particularly its drawability, and its resistance to aging cracks, allowing for the fabrication of products with complex shapes ； Its corrosion resistance is the same as that of 304. Thermos flasks, kitchen sinks, pots, kettles, insulated lunch boxes, doorknobs, textile processing machines. 304N1 18Cr-8Ni-N is based on 304 steel; it has reduced levels of S and Mn, with the addition of N to prevent a decrease in plasticity, increase strength, and reduce the thickness of the steel. Components, street lights, water storage tanks, and water pipes: 304N2 18Cr-8Ni-N. Compared to 304, it contains added N and Nb; it is a high-strength steel used for structural components. Components, street lights, water storage tanks: 316 18Cr-12Ni-2.5Mo. Due to the addition of Mo, it exhibits excellent corrosion resistance, resistance to atmospheric corrosion, and high-temperature strength, allowing it to be used in harsh conditions ； Excellent work hardening property (non-magnetic). Equipment used in seawater for producing items via chemicals, dyes, papermaking processes, oxalic acid, fertilizers, and other means ； Photography, food industry, coastal area facilities, ropes, CD rods, bolts, nuts – 316L, 18Cr-12Ni-2.5Mo, low carbon. As part of the low-C series of 316 steels, it possesses the same properties as 316 steel, in addition to having improved resistance to intergranular corrosion. Among the applications of 316 steel, there are products that require special resistance to intergranular corrosion. 321 18Cr-9Ni-Ti: Ti is added to 304 steel to prevent grain boundary corrosion ； Suitable for use at temperatures of 430°C–900°C. Aircraft, exhaust pipes, boiler drums – 409L: 11.3Cr-0.17Ti–low C, N. Due to the addition of Ti, it exhibits good corrosion resistance and high-temperature strength. Products such as automobile exhaust pipes, heat exchangers, and containers that are not heat-treated after welding. 410L 13Cr-low C: Based on 410 steel, it has a reduced carbon content, and exhibits excellent workability, resistance to welding deformation, and resistance to high-temperature oxidation. Mechanical components, engine exhaust pipes, boiler combustion chambers, burners. As a representative ferritic steel, 430 16Cr features a low coefficient of thermal expansion, as well as excellent formability and oxidation resistance. Heat-resistant appliances, burners, home appliances, category 2 tableware, kitchen sinks, exterior decorative materials, bolts, nuts, CD rods, screens 430J1L 18-Cr0.5Cu-Nb–low C.N: Elements such as Cu and Nb are added to 430 steel ； It has good corrosion resistance, formability, weldability, and resistance to high-temperature oxidation. Building exterior decoration materials, auto parts, hot and cold water supply equipment. 436L 18Cr-1Mo-Ti, Nb, Zr: low C and N content, excellent heat resistance and corrosion resistance; due to the presence of Nb and Zr elements, it boasts good workability and weldability. Washing machines, car exhaust pipes, electronic products, pots with 3 bottoms. 410 13Cr-low carbon, as a representative steel of martensitic steels, has high strength but is not suitable for use in harsh corrosive environments ； It has good workability and hardens upon heat treatment (becomes magnetic). Blades, mechanical parts, oil refining equipment, bolts, nuts, pump rods, category 1 tableware (knives and forks). 420J1 13Cr-0.2C has high hardness after quenching, good corrosion resistance (magnetic). Cutlery (knife), turbine blades. After quenching, 420J2 13Cr-0.3C has a higher hardness than 420J1 steel (it is magnetic). Blades, nozzles, valves, rulers, tableware (scissors, knives).

The main difference is the carbon content. Of course, the price is different as well. 316L is more expensive, so it is common to use 304 in place of 316L.

Thank you to so many kind people; I’ve learned a lot

Product properties and uses of common materials. Series 200: 201, 202 – chromium-nickel-manganese austenitic stainless steels. Series 300 – chromium-nickel austenitic stainless steels. 301 – has good ductility and is used for shaped products. It can also harden through machine speed. It has good weldability. Its wear resistance and fatigue strength are superior to those of 304 stainless steel. 302—Has the same corrosion resistance as 304; it has better strength due to its relatively higher carbon content. 303—Is easier to machine than 304 by adding small amounts of sulfur and phosphorus. 304— that is, 18/8 stainless steel. The GB grade is 0Cr18Ni9. 316—The second most widely used steel grade after 304, primarily used in the food industry and surgical instruments; molybdenum is added to it to confer a special corrosion-resistant structure. It is also used as \"marine steel\" because it has better resistance to chloride corrosion compared to 304. SS316 is typically used in nuclear fuel reprocessing facilities. 18/10 grade stainless steel generally also meets this application level. Model 321—has properties similar to 304, except that the addition of titanium reduces the risk of rusting in the welds of the material. 400 series—ferritic and martensitic stainless steels. 420—\"cutting tool grade\" martensitic steel, similar to the earliest stainless steels such as Brinell high-chromium steel. It is also used for surgical knives, and can be made very shiny. 430—Ferritic stainless steel, for decorative use, such as in automotive accessories. It has good formability, but poor heat resistance and corrosion resistance. SUS201: Its main composition is 17Cr-4.5Ni-6Mn-N; it is a nickel-reduced steel grade and serves as a substitute for 301 steel. It becomes magnetic after cold working and is used in railway vehicles. SUS202: Its main composition is 18Cr-5Ni8Mn-N; it is a nickel-reduced steel grade and serves as a substitute for 301 steel. Used for kitchen utensils. SUS301: Its main composition is 17Cr-7Ni, and high strength can be achieved through cold working. Used in railway vehicles, belt conveyors, bolts and nuts, springs, etc. SUS302: Its main composition is 18Cr-8Ni-0.1C; it can achieve high strength after cold working, but its elongation is inferior to that of 301 steel. Used as exterior decorative material for buildings. SUS303: Its main composition is 18Cr-8Ni-Mo, which improves cutting performance and resistance to high-temperature adhesion. Most suitable for automatic lathes. Bolts and nuts. SUS304: Its main composition is 18Cr-8Ni; it is the most widely used stainless steel and heat-resistant steel. Used in food production equipment, Xitong chemical equipment, nuclear energy, etc. SUS304L: Its main composition is 18Cr-9Ni-low carbon; it is a very low-carbon version of 304 steel. It exhibits excellent resistance to intergranular corrosion. Used for components that cannot undergo heat treatment after welding, etc. SUS310S: Its main composition is 25Cr-20Ni; it has better oxidation resistance than 309S steel and is often used as a heat-resistant steel. SUS321: Its main composition is 18Cr-9Ni-Ti, with Ti added to improve its resistance to intergranular corrosion. Not recommended for decorative parts. SUS316: Its main composition is 18Cr-12Ni-2.5Mo, and it exhibits better corrosion resistance to seawater and various corrosive media than 304 steel. Used in materials resistant to pitting corrosion. SUS316L: Its main composition is 18Cr-12Ni-2.5Mo-low C; it is a very low-carbon version of 316 steel. Its properties are those of 316 steel combined with resistance to intergranular corrosion. SUS317: Its main composition is 18Cr-12Ni-3.5Mo, and it has better pitting resistance than 316 steel. Used for materials in printing and dyeing equipment. SUS430: Its main component is 18Cr; it is a steel grade with good corrosion resistance and versatility. Used for architectural decoration, fuel burner components, household appliances, and home appliance parts.