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Stainless steel is one of the most important alloys that exist out there in the world. That’s because people use stainless steel for manufacturing many different items. Kitchen sinks, cookware, and vehicles hold a prominent place out of them. However, it is important to keep in mind that there are many different types of stainless steel. You need to pick the right type based on your application to get the best results. Read on and we will share the details with you.
Different Grades of Stainless Steel
There are multiple grading systems that grade stainless steel. Out of them, the Society of Automotive Engineers 3-Digit system holds a prominent place. This provides a three-digit code for stainless steel. First digit refers to the primary alloy of stainless steel. Second and third digits are representing the carbon percentage of it.
Another grading system is the American Society for Testing and Materials 6-digit system. This grading scheme includes both numbers and letters.
With that in mind, let’s take a look at different grades of stainless steel in detail:
300 Stainless Steel Series
In the 300 stainless series, you can find 18% to 30% chromium and 6% to 20% nickel composition. This is a solid iron that contains cubic crystals. This type of stainless steel is ideal for automotive, construction, and aerospace industries. It is hardenable through cold working methods.
301
This grade of stainless steel is malleable and attractive. You can use them for applications that require corrosion resistance and high strength. They have excellent abrasion resistance properties as well.
304
Around 50% of stainless steel belongs to this grade. It has around 8% nickel and 18% chromium. As a result, you can find them durable and aesthetically pleasing. Saline is the only drawback that you can find in this grade.
316
This is the second most popular grade of stainless steel out there in the world. It has around 2-3% molybdenum. This grade of stainless steel is ideal for manufacturing surgical supplies.
317
This grade of stainless steel is produced at very high temperatures. It is highly resistant to pitting and corrosion. As a result, this is the most expensive alloy available as well.
400 Stainless Steel Series
This series of stainless steel has chromium composition of 11% and manganese composition of 1%. As a result, it is offering high strength along with lower resistance to wear and tear.
409
If you are looking for excellent corrosion resistance, this is the ideal option. It has less chromium as compared to other stainless steel grades. As a result, you can get this at a cost effective price as well. Common applications of this grade include automotive exhaust products.
420
This is a bright variation of stainless steel. It is among the earliest iron and carbon alloys as well. It has around 12% chromium. As a result, you can find excellent corrosion resistance properties. This grade of stainless steel is quite popular as blade grade steel. You can often find it in surgical instruments.
430
This grade of stainless steel doesn’t resist corrosion or extreme temperatures well. As a result, it is often used for decorative applications. For example, you can use it for backyard barbecue grills or as an automotive trim.
434
434 stainless steel grade is highly oxidation and corrosion resistant. It can withstand extremely high temperatures of up to 1500 degrees Fahrenheit. You will not be able to harden this type of stainless steel through heat treatment. As a result, it is cold formed. You can often find this in automotive trims.
904L Stainless Steel
904L stainless steel contains copper. Due to the same reason, this grade of stainless steel can resist corrosion from acids. However, it is quite expensive. This makes manufacturers take a look at alternative grades for their manufacturing needs.
What is the Best Grade of Stainless Steel?
The best grade of stainless steel varies based on your application. Here are some of the most common grades and their applications.
Grade 304
Grade 304 stainless steel is ideal for general purpose applications. That’s because it offers excellent weldability, formability, and corrosion resistance. You can also use it for applications such as household items, food processing items, and kitchen equipment.
Grade 316
Grade 316 stainless steel is ideal for highly corrosive environments. That’s why you can find it in chemical processing and marine applications. Moreover, you can use this for medical devices as well.
Grade 410
If there are application that need high wear resistance and hardness, you may consider using grade 410 stainless steel. It is possible to heat treat this grade and further increase its hardness. The applications of this grade include tools, surgical instruments, and cutlery.
Grade 430
This grade is ideal for indoor and decorating applications. It offers excellent corrosion resistance in mild environment. Moreover, you can get perfect magnetic and low cost properties. Some of the applications include kitchen utensils, automotive applications, and appliances.
Final Words
As you can see, you can find many different types and grades of stainless steel. It is important to pick the right grade depending on what your needs are. Then you will be able to continue using it and get the desired results.
Recommended Readings:
- STAINLESS STEEL GRADES AND FAMILIES: EXPLAINED.
- Guide to Stainless Steel Grades.
- What are the Most Common Types of Stainless Steel?.
- All About Stainless Steel Types and Grades.
