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Things You Must Know When Buy Stainless Steel

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.

1. Types And Grades Of 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:

GBASTM / UNSDIN EN/DINJIS
06Cr11Ti(0Cr11Ti)409 / S40900X5CrTi 12 / 1.4512SUH 409
10Cr17 (1Cr17)430 / S43000X6Cr 17(X8Cr 17) / 1.4016SUS 430
12Cr13 (1Cr13)410 / S41000X10Cr 13 / 1.4006SUS 410
30Cr13 (3Cr13)S42000X30Cr 13 / 1.4028SUS 420J2
10Cr17Mo(1Cr17Mo)434 / S43400X6CrMo 17 / 1.4113SUS 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:

GBASTM / UNSDIN EN/DINJIS
12Cr17Mn6Ni5N201 / S20100X12CrMnNi 17-7-5SUS 201
12Cr18Mn9Ni5N202 / S20200X12CrMnNi 18-9-5SUS 202
12Cr17Ni7301 / S30100X10CrNi 18-8 / 1.4310SUS 301
S30153301LN / S30153X2CrNiN18-7 / 1.4318SUS 301L
Y12Cr18Ni9303 / S30300X8CrNiS 18-9 / 1.4305SUS 303
06Cr19Ni9304 / S30400X5CrNi 18-10 / 1.4301SUS 304
022Cr19Ni10N304LN / S30453X2CrNiN 18-10 / 1.4311SUS 304LN
022Cr19Ni10304L / S30403X2CrNi 19-11 / 1.4306SUS 304L
16Cr25Ni20Si2S31400X15CrNiSi 25-20 / 1.4841-
06Cr17Ni12Mo2316 / S31600X5CrNiMo 17-12-2 / 1.4401SUS 316
022Cr17Ni12Mo2316L / S31603X2CrNiMo 18-14-3 / 1.4435SUS 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:

GBASTM / UNSDIN EN/DINJIS
12Cr13 (1Cr13)410 / S41000X10Cr 13 / 1.4006SUS 410
30Cr13 (3Cr13)S42000X30Cr 13 / 1.4028SUS 420J2
Y12Cr13(Y1Cr13)416 / S41600X12CrS 13 / 1.4005SUS 416
20Cr13 (2Cr13)420 / S42000X20Cr 13 / 1.4021SUS 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:

GBASTM / UNSDIN EN/DINJIS
03Cr25Ni6Mo3Cu2N255 / S32550X2CrNiMoCuN 25-6-3 / 1.4507SUS 329J4L
022Cr22Ni5Mo3N (022Cr23Ni5Mo3N)250 / S31803(S32205)X2CrNiMoN 22-5-3 / 1.4462SUS 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:

GBASTM / UNSDIN EN/DINJIS
04Cr13Ni8Mo2Al (S51380)S13800--
05Cr17Ni4Cu4Nb (0Cr17Ni4Cu4Nb)630 / S17400X5CrNiCuNb 17-4 / 1.4542SUS 630
07Cr17Ni7Al (0Cr17Ni7Al)631 / S17700X7CrNiAl 17-7 / 1.4568SUS 631

2. Application Of Stainless Steel

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.

3. Things To Note When to Buy Stainless Steel

When to buy stainless steel, there are a few things to consider:

  • Determine usage requirements: Different types of stainless steel have different materials and properties, so it is necessary to clarify the specifications, sizes, uses, etc. of the required stainless steel products in order to choose the most suitable stainless steel.
  • Product quality: When to buy stainless steel, you must do quality testing to ensure that the quality and performance meet your requirements, and conduct strict testing.
  • Use environment and requirements: Depending on the environment and specific requirements for the stainless steel you need, consider whether its corrosion resistance, wear resistance, strength and other characteristics meet the requirements.
  • Supplier reputation and service: Understand the quality control system and after-sales service of stainless steel suppliers, and choose stainless steel suppliers with good reputation and reliable quality.

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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