Everything You Need To Know To Find The Best Stainless Steel Sheet Coil

What factors matter for choosing stainless steel?

Here are the key factors when considering to buy stainless steel coils according to your need:

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Corrosion resistance

For stainless steel products, the installation environment is a key factor.

When choosing stainless steel, we mainly consider the atmospheric conditions, the concentration levels of particular chemicals, and the acid.

If the installation environment is less corrosive, an austenitic stainless steel grade for general purpose is suitable. While, for a highly acidic environment, you need to choose a stainless steel grade like 316, 904L, or .

Heat resistance

The temperature of the environment is also an important factor.

In the furnace environment(900-C), the high temperatures will speed up the corrosion of stainless steel.

Also, it puts extra pressure on stainless steel products.

So, if the temperature is always high, you need the well heat-resistant stainless steel, such as 321 and 253MA.

Cryogenic resistance

Very low temperature is another factor. Austenitic stainless steels are effective at very low temperatures.

They maintain a higher tensile strength at low temperatures than at ambient temperatures.

Despite a slight degrading of toughness, these steels work well in temperatures as low as -161°C.

Magnetic response

Austenitic grades have a low magnetic response.

Those with higher nickel content are not magnetic under any conditions, such as the 316 or 310 grades.

And the ferritic and martensitic stainless steel grades (400 series) are highly permeable.

Moreover, duplex grades like and are also ferromagnetic.

Strength required

Steel strength is an important factor to consider before you choose the grade, but it is a complex one.

Your requirements for stainless steel depending on the purpose and the installation environment.

In some cases, high strength stainless steels, like austenitic and duplex, are suitable. But in some cases, their disadvantages are also obvious and do not meet your requirements.

For example, high strength austenitic steels produced by work hardening are not suitable for welding. It makes the steels soft.

Form of product

Stainless steel products come in many forms, such as sheets, bars, and tubes.

The form will affect the grade you need.

Not all grades have all product forms and sizes. Austenitic stainless steels are very versatile.

You can find products in a wide variety of forms and sizes for different purposes. Ferritic steels generally appear in sheet form. And martensitic steels are common in solid bar form.

Special requirements

When installing stainless steel products, there may be some special requirements.

As a result, you may need to change the grade of steel.

For example, you may want non-magnetic steel, need products that are suitable for welding or products with a high degree of forming. Or simply you just want a good-looking product.

Cost

Cost is always a factor when choosing to buy stainless steel coil.

And you need to balance it with all the other considerations. Sometimes the best technical steel is too expensive.

But please remember to assess the cost on a life cycle basis.

Do not look at the initial price only then overlook the life cycle. Stainless steel products have a long life, so a high cost for high-quality steel is reasonable.

How can you tell good quality stainless steel coil?

As long as the quality is good enough, stainless steel is one of the safest materials.

But remember, the quality matters.

So, how do you know if the stainless steel coil you&#;ve got is good or not? Try out the below methods.

Use a magnet?

The theory of the &#;magnet test&#; is a rumour.

It tells you that you can test the quality of stainless steel with a magnet.

But the fact is that the magnet is to test whether the steel is austenitic, or whether the steel contains chromium and nickel.

There are three main types of structures in stainless steel: austenite, ferrite, and martensite.

When you see stainless steel with 18/8 or 18/10 marks, it tells you the amount of chromium and nickel.

• The first number 18 indicates 18% chromium in the steel.
• The second number 8 or 10 means 8% or 10% nickel in the steel. Nickel is a critical factor for forming austenite stainless steel.

So, both 18/8 and 18/10 are austenitic.

HWHG contains other products and information you need, so please check it out.

The &#;magnet test&#; is useful when you use it in the right way. And it&#;s easy to do by simply taking a magnet to your stainless steel coil.

If the magnet sticks, the coil is safe because it indicates no nickel in the steel. But if the magnet doesn&#;t stick, it means the steel contains nickel, so the coil is not safe for food usage.

This test is credible.

If a magnet is to stick to steel, it is not a nickel (austenitic) alloy.

The magnet works in some cases, but not always right.

There is a problem with this theory, however.

First of all, there are no stainless steel pans with magnetic inside and outside. It&#;s very difficult to find a fully magnetic stainless steel coil on the market.

That&#;s not surprising. The reason is that austenitic stainless steel which contains nickel is highly resistant to corrosion.

Corrosion resistance is very important to buy stainless steel coil, isn&#;t it?

If the coil is fully magnetic stainless steel, it would corrode and not last very long. Without nickel, the metal is not stable.

For this reason, it&#;s not necessary to buy stainless steel coils that are magnetic, nickel-free.

For the cases of cookware

You will find magnetic stainless steel in the outer layer of some quality stainless steel.

It&#;s to make the coil compatible with induction stovetops in case you need it for cookware. The reason is, induction stovetops use an electromagnetic field to heat the cookware.

So, high-quality stainless steel cookware usually has three layers of metal. The interior is austenite stainless steel. The exterior is ferrite stainless steel. And the middle layer is aluminium.

It&#;s for good heat conductivity because steel itself does not conduct heat evenly. Stainless steel of poor quality usually has only one austenitic layer.

But there is still a difference in quality between different types of austenitic stainless steel.

Sometimes you will find that austenitic stainless steel is less magnetic. That&#;s because, during manufacturing, the steel is cold-processed to form ferrite and martensite.

This process makes it easier to corrode and leach.

The formulation of austenitic stainless steel cookware is careful to avoid this. And the result is a very stable austenitic alloy that resists corrosion and leaching of the metal.

So, A carefully-formed, highly-stable, non-corrosive, and nickel-containing stainless steel is safer than a pure magnetic stainless steel.

Pure magnetic stainless steel will break down and corrode over time. And it doesn&#;t even exist in the market!

To be honest, it&#;s hard to know whether your stainless steel is of the best quality unless you are a metal expert. Or unless you go to the factory and see how it&#;s made. Otherwise, you won&#;t know whether your stainless steel has corrosive materials.

The best choice

Your best choice is to buy high-quality stainless steel from the start, choose a brand with a good reputation for quality, such as WJH premium stainless steel.

But still, there&#;s another way for you to determine whether the stainless steel coils you&#;ve got is potentially harmful.

Material tester

Distinguish between 201 stainless steel, 202 stainless steel, and 304 stainless steel

What is all this stuff? They are the types/grades of stainless steel. No worries. We&#;ll tell you in detail in the following section after this.

Now let&#;s focus on how to make use of the tester.

A lot of people find it quite challenging to purchase stainless steel coils. It is to be mentioned that there are more than 60 grades of stainless steel. This is a complete guide to helping people choose the best stainless steel coil.

Let us start.

DifferentFactors You Need Consider

1. Corrosion resistance

This topic of corrosion resistance is extremely important to know when purchasing stainless steel products. The standard grade most commonly used for food grade applications is AUSTENITIC STAINLESS STEEL. Due to its chemistry, austenitic stainless steels show tremendous resistance to basic corrosive environments containing only salt and water. Specifically, our 304 &#; grades (including but not limited to), include 18/22, 20/30, 15/25, and 10/15. Use the proper grade based on your installation environs; atmospheric conditions such as air quality, moisture content, and acidity levels can greatly increase the corrosion rate of a product.

2. Resistance to heat

Many More customers choose stainless steel coils because they can use them everywhere without any concern about the corrosion. Temperature is a factor to consider when purchasing stainless steel products. High temperatures, such as in a furnace environment of (900 &#; C) can increase the corrosion of stainless steel products. Moreover, high temperature exerts high pressure on the products. So you will have to purchase heat-resistant stainless steel, such as 253MA and 321MA if the temperature is always high.

4. Magnetic response

Austenitic and ferritic grades of stainless steel typically have a lower magnetic content, whereas chromium-based grades are more magnetically active. You must check the magnetic response for each type of grade; austenitic is not as strong as carbonitride and 310, 316, and 430 grade steels so these all tend to show very little effect. Martensitic Stainless with higher magnetic content such as 310, 320, 330, 410, and 416 , which are not magnetic but can be made into hardware that is by using posthardening processes such as nitriding, has deep cryogenic Tempering to achieve those characteristics. Duplex grades like and are ferromagnetic while others like 400CN and 452CBM are paramagnetic.

5. Cost

Cost is one of the most important factors when buying stainless steel coil. Stainless steel of high price can be worth the money as it can run for a longer time. So you need to access the costs depending upon the basis of the life cycle. Different 201 stainless steel coil&#;sell the products at different costs.

6. Strength required

It can be quite complex to know the steel strength that you require. The strength requirement depends upon the installation environment and the purpose of installation. In some cases, high-strength duplex and austenitic stainless steel are suitable. But in some cases, these can be the most unsuitable as they cannot meet your requirements. So you must check the strength that is required for your work.

7. Common manufacturers

The stainless steel coils are available from a number of manufacturers in the world. Jiangsu Tisco Supply Co.,Ltd is a professional manufacturer with more than 20 years of experience in manufacturing stainless steel, carbon steel, and galvanized steel established in . We also offer stainless steel coils of these brands including TISCO, ZPSS, Baosteel, POSCO, LISCO, YUSCO, Ansteel, QPSS, JISCO, HXSCO, Chengde, Yongjin, Tsingshan, Shouyang, HW, etc. 

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Different Types You Need Consider

301 stainless steel

With high ductile, 301 steel is most used for molding products. It can harden rapidly during machining. As to the abrasive resistance and fatigue strength, 301 steel is better than 304 steel.

302 stainless steel

Its corrosion resistance is the same as 304, but the strength is slightly higher due to the addition of carbon.

303 stainless steel

By adding the elements of sulfur and phosphorus, 303 stainless steel is easier to process when compared to 304 steel.  ISO named it &#;A1&#;

304 stainless steel

304 stainless steel is the most common 18/8 stainless steel. It has also known name &#;A2&#; by ISO.

316 stainless steel

316/316L sheet possesses excellent mechanical properties at sub-zero temperatures and good corrosion resistance making it a great choice for marine applications.

Contact us to discuss your requirements of Stainless Steel Sheet Coil. Our experienced sales team can help you identify the options that best suit your needs.