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Stainless steel is an alloy material with excellent corrosion resistance. In our daily life, we can see products made of various types of stainless steel everywhere. It is widely used in many fields, with large market demand and many types. When to buy stainless steel, you should first understand it clearly. This article will explore the types, grades and applications of stainless steel and provide you with some advice to make an informed decision when purchasing stainless steel.
When to buy stainless steel, you must first know what type of stainless steel you need. Stainless steel is classified in different ways and can be divided into many types. Here are some common stainless steel types and grades classified according to their composition and structure:
(1) Ferritic stainless steel
This type of steel is a stainless steel containing high chromium, which has good corrosion resistance, good stability and strong magnetic properties. Here are some common ferritic stainless steel grades:
| GB | ASTM / UNS | DIN EN/DIN | JIS |
|---|---|---|---|
| 06Cr11Ti(0Cr11Ti) | 409 / S40900 | X5CrTi 12 / 1.4512 | SUH 409 |
| 10Cr17 (1Cr17) | 430 / S43000 | X6Cr 17(X8Cr 17) / 1.4016 | SUS 430 |
| 12Cr13 (1Cr13) | 410 / S41000 | X10Cr 13 / 1.4006 | SUS 410 |
| 30Cr13 (3Cr13) | S42000 | X30Cr 13 / 1.4028 | SUS 420J2 |
| 10Cr17Mo(1Cr17Mo) | 434 / S43400 | X6CrMo 17 / 1.4113 | SUS 434 |
(2) Austenitic stainless steel
Austenitic stainless steel is a material with good comprehensive properties, resistant to corrosion in various media, and has good high-temperature performance. It is usually added with elements such as nickel and molybdenum. The following are some common models of this type of steel:
| 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 |
(3) Martensitic stainless steel
This type of steel is stainless steel with a high carbon content, high strength and hardness, and excellent heat treatment properties. The following are some common martensitic stainless steel grades:
| GB | ASTM / UNS | DIN EN/DIN | JIS |
|---|---|---|---|
| 12Cr13 (1Cr13) | 410 / S41000 | X10Cr 13 / 1.4006 | SUS 410 |
| 30Cr13 (3Cr13) | S42000 | X30Cr 13 / 1.4028 | SUS 420J2 |
| Y12Cr13(Y1Cr13) | 416 / S41600 | X12CrS 13 / 1.4005 | SUS 416 |
| 20Cr13 (2Cr13) | 420 / S42000 | X20Cr 13 / 1.4021 | SUS 420J1 |
(4) Duplex stainless steel
This type of steel is composed of two phases, ferrite and austenite, and has excellent pitting corrosion resistance, high strength, good corrosion resistance and good plasticity. The following are some common grades of this type of steel:
| GB | ASTM / UNS | DIN EN/DIN | JIS |
|---|---|---|---|
| 03Cr25Ni6Mo3Cu2N | 255 / S32550 | X2CrNiMoCuN 25-6-3 / 1.4507 | SUS 329J4L |
| 022Cr22Ni5Mo3N (022Cr23Ni5Mo3N) | 250 / S31803(S32205) | X2CrNiMoN 22-5-3 / 1.4462 | SUS 329J3L |
| - | 329 / S32900 | - | SUS329J1 |
| 022Cr19Ni5Mo3Si2N (00Cr18Ni5Mo3Si2) | S31500 | - | - |
(5) Precipitation hardened stainless steel
This type of stainless steel is a special high-performance material whose matrix is austenite or martensite and is strengthened by precipitation hardening. The following are some common grades of this type of steel:
| GB | ASTM / UNS | DIN EN/DIN | JIS |
|---|---|---|---|
| 04Cr13Ni8Mo2Al (S51380) | S13800 | - | - |
| 05Cr17Ni4Cu4Nb (0Cr17Ni4Cu4Nb) | 630 / S17400 | X5CrNiCuNb 17-4 / 1.4542 | SUS 630 |
| 07Cr17Ni7Al (0Cr17Ni7Al) | 631 / S17700 | X7CrNiAl 17-7 / 1.4568 | SUS 631 |
Different applications will use stainless steel differently, so when buying stainless steel, you need to know which stainless steel is suitable for your project. Stainless steel is widely used in various fields, including construction, industry, manufacturing, automotive, medical equipment, food processing and other fields.
According to the common types of stainless steel, ferritic stainless steel is often used to make nitric acid and food factory equipment, interior decoration, stoves, gas turbine parts, etc.; austenitic stainless steel is suitable for making acid-resistant equipment, food processing equipment, pressure vessels, pipelines, etc. ; Martensitic stainless steel is often used in the manufacture of cutting tools, mechanical parts, etc.; duplex stainless steel is often used in the manufacture of chemical equipment, marine pipelines, etc.; precipitation hardening stainless steel is used in the manufacture of engine parts, equipment parts, etc.
When to buy stainless steel, there are a few things to consider:
In summary, when purchasing stainless steel, it is necessary to have a clear understanding of product types, applications, suppliers, and other aspects. If you currently want to buy stainless steel, Songshun will be a good choice for you. We can ensure that the stainless steel you purchase is of favorable price, good quality, and can receive timely support and problem-solving services, so that you can purchase high-quality stainless steel that meets your needs.
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