Applications
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Item |
Products |
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Kind of stainless |
Austenite: STS 301, 304, 304L, 304J1, 316, 316L, 304D |
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Surface status |
BA |
2B |
2D |
CSP |
HL |
SM |
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Spec. |
Thickness |
Ultra-thin plate: 0.02m/m ~ 0.1m/m |
General: 0.1m/m ~ 1.5mm |
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Width |
350m/m ~ 2m/m |
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Features of Stainless
Stainless(STS) steel is made from a mixture of iron (Fe) and a large amount of chrome.It is made difficult to rust.As occasion demands, a small amount of calcium (C), nickel (Ni), silicon (Si), manganese (Mn), or molybdenum (Mo) is added, which is called alloy steel.
The main ingredient of stainless steel is iron (Fe), but it has also excellent features that general steels don't have.
The surface is beautiful and the wrapping quality is excellent.
Corrosion resistance is remarkable so the environment for use is not restricted and it is hygiene.
Processing quality is excellent so it is easy to transform.It has high strength, which protects it from external shock.
Fireproof and thermal resistance is big (high temperature strength).
By the virtue of these features, stainless(SUS) steel doesn't need painting or coating. Its high corrosion resistance makes it possible to develop various surface roughness so stainless steel is widely applied to not only kitchenware for our daily life, but also electronics, chemistry, heavy industries and all the other industries.
i°Stainless± is a compound word of i°staini± and i°lessi±.It is important to understand i°stainlessi± as that it is difficult to rust, not that it never rusts.
Stainless steel itself doesn't prevent corrosion, but chemical ingredients contained in it makes a protective film (anodizing) on the surface, which prevents oxidation (rusting) that general steel gets to have.
The protective film of this stainless steel can be destroyed under the oxidizing environment, and the environment can cause a different degree of corrosion so a correct type of stainless should be selected and it should be used rightfully.
Classification
1. Classification by ingredient
Representative features of stainless steel
|
Kind of stainless |
STS 410 (13Cr class) |
STS 430 (18Cr class) |
STS304, STS316 (18-8 class) |
STS 631 (16-7-1A1 class) |
|
Features |
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Magnetism |
Yes |
Yes |
No (magnetism is found a little after cold processing) |
No (magnetism is found after heat-treatment hardening) |
|
Whether it rusts or not |
Sometimes |
Little chance in doors, but possible out of doors |
Have remarkable corrosion resistance |
Almost same as 18-8 class |
|
Shock, Extension |
Worse than 18-8 class |
Worse than 18-8 class |
Quite good, but formability is high |
Has high hardness and strength after heat-treatment hardening |
|
Thermal expansion |
Almost same as normal steel |
Almost same as normal steel |
About 1.5 times larger than normal steel |
Almost same as normal steel |
|
Thermal conductivity |
1/2 of that for normal steel |
1/2 of that for normal steel |
About 1/3 of that for normal steel |
About 1/3 of that for normal steel |
|
Heat-treatment hardening quality |
Yes |
No |
No |
Yes |
Classification of stainless steel by main ingredient
|
Classification by main ingredient |
Classification by metal class |
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|
Item |
Name |
Representative kind |
Total no. of kinds |
Composition |
|
|
Chrome class |
13Cr class |
STS 410 |
51 |
13% Cr |
Martensite |
|
18Cr class |
STS 430 |
24 |
18% Cr |
Ferrite |
|
|
Chrome-Nickel class |
18Cr-8Ni class |
STS 304 |
27 |
18%Cr-8%Ni |
Austenite |
|
STS 316 |
32 |
18%Cr-8%Ni-2.5%Mo |
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16Cr-7Ni-1Ai class |
STS 631 |
- |
16%Cr-7%Ni-1%A1 |
Age hardening |
|
2. Classification by surface
Classification by the surface of stainless cold rolling plate
|
Kind of surface |
Special features |
Use |
|
No.1 |
Surface of the products that have gone through hot rolling, heat-treatment, and pickling |
Tank for industry and chemical industrial devices |
|
No.2D |
Surface of the products that have gone through hot rolling, heat-treatment, and pickling |
Petrochemical facilities and pipes |
|
No.2B |
Surface of the products that have gone through cold rolling, heat-treatment, pickling and skin pass mill |
Kitchenware, western food dishes, and construction materials |
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No.3 |
Surface of the products that are made from No. 2B that is polished with #100~#120 polishing belt |
Interior and exterior decorations for construction, and kitchen facilities |
|
No.4 |
Surface of the products that are made from No. 2B that is polished with #150~#180 polishing belt.The polishing status is better than that for No. 3. |
Dairy farming facilities and kitchen facilities |
|
No.6 |
Stain finished product that has better polishing status than No. 4. Graceful surface with brightness removed |
Interior and exterior decorations for construction |
|
No.7 |
Polished product having a function of somewhat reflection. #400~#600 abrasive has turned buff to polish.The polishing marks are not removed completely. |
Dairy farming facilities and construction materials |
|
No.8 |
Polished surface that has quite much brightness and reflection. Over #800 abrasive has turned the buff to polish. |
Interior and exterior decorations for construction and small mirrors |
|
HL |
Made from No. 4 with #150~180 polishing belt. Consecutive polishing patterns are expressed. |
Interior and exterior decorations for construction and chassis doors |
|
L-HL |
Made from No. 4 with #400 polishing belt.Consecutive polishing patterns are expressed.It is softer and more graceful than HL. |
Construction materials and vehicles |
|
SM |
Highly bright surface more than that of No. 8.It conforms to glass mirror. |
Construction materials and mirrors |
