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In daily life, we often see products made of stainless steel, so what is stainless steel? What’s inside the stainless steel? This article will introduce in detail the characteristics, type, grades, chemical composition, property and application, material specifications and other information about stainless steel.
Stainless steel, also known as stainless acid-resistant steel, is a ferroalloy material with excellent rust resistance, corrosion resistance and formability. It has a variety of surface treatments, and in the production process, it has good heat treatment performance, good processing performance, high efficiency, and has the best fire resistance among all metal materials. And stainless steel is widely used in the fields of electrical appliances, daily necessities and heavy industry.
1.Excellent corrosion resistance and rust resistance in various corrosive media
2.The surface is smooth, bright, bright and beautiful, easy to clean
3.Good wear resistance, heat resistance, oxidation resistance and welding performance
4.Easy plastic processing, good polishing
5.Anti-fatigue, high strength, high toughness
6.Good durability and long service life
7.High temperature and low temperature resistance
8.Excellent thermal expansion performance and thermal insulation performance
According to the crystal structure of stainless steel, it can be divided into five types:
(1) Austenitic stainless steel
Included models are: AISI 201, 202, 301, 301L, 304, 309s, 310s, 316L and other models.
(2) Martensitic stainless steel
The models included are: AISI 410, 414, 416, 416(Se), 420, 431, 440A, 440B and other models.
(3) Ferritic stainless steel
Included models are: AISI 409, 430, 430Ti, 433, 434, 436, 439, 441 and other models.
(4) Austenitic-ferritic duplex stainless steel
The models included are: AISI 255, 329, 2205, S31500, S31803, S31200 and other models.
(5) Precipitation hardened stainless steel
The models included are: 630, 0Cr17Ni4Cu4Nb, 0Cr17Ni7Al, 0Cr15Ni25Ti2MoVB and other models.
| GB | ASTM / UNS | DIN EN/DIN | JIS |
|---|---|---|---|
| 12Cr17Mn6Ni5N | 201 / S20100 | X12CrMnNi 17-7-5 | SUS 201 |
| 12Cr18Mn9Ni5N | 202 / S20200 | X12CrMnNi 18-9-5 | SUS 202 |
| 12Cr17Ni7 | 301 / S30100 | X10CrNi 18-8 / 1.4310 | SUS 301 |
| S30153 | 301LN / S30153 | X2CrNiN18-7 / 1.4318 | SUS 301L |
| Y12Cr18Ni9 | 303 / S30300 | X8CrNiS 18-9 / 1.4305 | SUS 303 |
| 06Cr19Ni9 | 304 / S30400 | X5CrNi 18-10 / 1.4301 | SUS 304 |
| 022Cr19Ni10N | 304LN / S30453 | X2CrNiN 18-10 / 1.4311 | SUS 304LN |
| 022Cr19Ni10 | 304L / S30403 | X2CrNi 19-11 / 1.4306 | SUS 304L |
| 16Cr25Ni20Si2 | S31400 | X15CrNiSi 25-20 / 1.4841 | - |
| 06Cr17Ni12Mo2 | 316 / S31600 | X5CrNiMo 17-12-2 / 1.4401 | SUS 316 |
| 022Cr17Ni12Mo2 | 316L / S31603 | X2CrNiMo 18-14-3 / 1.4435 | SUS 316L |
| 12Cr13 | 410 / S41000 | X10Cr 13 / 1.4006 | SUS 410 |
| 68Cr17 | 440A / S44002 | - | SUS 440A |
| SUS 440A | 630 / S17400 | - | SUS 630 |
| Grade | Chemical Composition(%) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ASTM / UNS | C | Si | Mn | P | S | Cr | Ni | Mo | Cu | V | Other | |
| 201 / S20100 | ≤0.15 | ≤1.00 | 5.5 - 7.5 | ≤1.00 | 5.5 - 7.5 | 5.5 - 7.5 | 5.5 - 7.5 | 5.5 - 7.5 | 5.5 - 7.5 | 5.5 - 7.5 | 5.5 - 7.5 | |
| 316 / S31600 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.00-18.00 | 10.0-14.0 | 2.00-3.00 | - | - | - | |
| 410 / S41000 | ≤0.15 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.028 | 11.50-13.50 | 3.00 | 0.60 | - | - | - | |
| 440A / S44002 | 0.60-0.75 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.028 | 16.0-18.0 | - | ≤0.75 | - | - | - | |
| 630 / S17400 | ≤0.70 | ≤1.00 | ≤1.00 | ≤0.035 | ≤0.028 | 15.5-17.5 | 3.00-5.00 | - | 3.00-5.00 | - | Nb:0.15-0.45 | |
AISI 304 Stainless Steel
304 steel is one of the most commonly used materials in the manufacture of daily necessities, and is a common material in stainless steel. 304 stainless steel contains more than 18% chromium and more than 8% nickel. It cannot be hardened by heat treatment, but it can be work hardened. It has the characteristics of good processability, corrosion resistance and high toughness. Widely used in industry, food, construction, furniture decoration, medical and chemical industries.
AISI 316 Stainless Steel
AISI 316 stainless steel is the second most widely used steel grade. Due to the addition of Mo element, its corrosion resistance and high temperature strength are greatly improved, and it is non-magnetic. Mainly used in production equipment, surgical equipment, ropes, bolts, nuts, valve bodies, etc.
AISI 410 Stainless Steel
It contains 0.15% carbon and 13% chromium, and is a martensitic stainless steel. AISI 410 Stainless Steel has the characteristics of excellent machinability, high strength, corrosion resistance and good processing performance. It is primarily used in the manufacture of knives, food processing equipment, mechanical components, valves, bearings, pressure vessels, aerospace parts, automotive exhaust systems, and more.
Stainless Steel Bar (round bar, hexagonal bar, square bar, oval bar): diameter 2mm-480mm;
Stainless Steel Plate:
General stainless steel plate specifications and sizes: 1000×2000 mm, 1219×2438 mm, 1500×6000 mm, 1800×6000 mm.
Different types of stainless steel have different specification ranges, and other specifications can be customized;
Stainless steel has many excellent properties and is widely used in many industries, and there are more and more stainless steel manufacturing companies, so it is necessary to learn more about stainless steel and better choose the stainless steel that suits your project.
Songshun Steel, as a professional stainless steel supplier in China, supplies various types of stainless steel and ensures to provide you with the best quality stainless steel products.
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