Stainless Steel Coil
According to the definition in GB/T20878-2007, stainless steel is a kind of steel material with excellent corrosion resistance. Its chromium content is at least 10.5%, and the carbon content is not more than 1.2%.
| Product Name | Stainless Steel Coil |
| Thickness | 0.3 mm – 10 mm |
| Width | 1,000 mm – 2,000 mm |
| Grade | 200 series/300 series /400 series, 201/202/304/304L/316/316L/410/420, etc. |
| Technology | Hot Rolled/Cold Rolled |
| Standard | ASME, ASTM, EN, BS, GB, DIN, JIS, etc. |
| Surface Finish | No.1/No.2/2B/BA/Mirror/8K/Hairline |
| Minimum Order Quantity | 2,000 tons |
| Package | Standard Seaworthy Package |
Features of Stainless Steel
- Highly corrosion resistance & Fire resistance
- Low maintenance & Easy to clean
- Aesthetic appearance & Various finishes
- Great weldability & Good polishing performance
- High strength, toughness and good plasticity
- Light weight
- Long service life
- 100% recyclable
Applications of Stainless Steel
Due to the many great features of stainless steel, it is widely used in many industries. It includes constructions, home appliances, automobiles, kitchen accessories, mechanical structure, decoration engineering, chemical industry, etc. Let’s have a brief review.
1. Construction & Buildings
It is an essential building material widely used in commercial buildings, bridges, airports, etc. The most common uses include structural frames, roofing, wall panels, claddings, door panels, backsplash, handrailings, ceilings, elevator hall, inner panels of elevators, etc. Also, it is perfect for making handicrafts.
2. Automobile
Different grades of stainless steel can be used to manufacture car bodies, grills, trims, wheel axles, bearings, vehicular exhaust, fuel tanks, etc.
3. Industrial Uses
Stainless steel is ideal for transporting chemicals, liquids, etc. It is typical for medical uses, gas and oil industries, such as pipelines and tubes, blades, operation tables, pumps, processing or storage tanks & vessels, etc.
4. Household Appliances
About 75% of household appliances are made of stainless steel, including internal panels of cookers, heaters, ovens, burners, conveyors, grills, television, washing machine, refrigerator, kitchen hardware, etc.
5. Furniture & Daily Uses
Stainless steel coil and sheet are also versatile in our daily life, such as trash cans, screens, benches, tables, beds, bookshelves, advertising boards, display stands, etc.
Different Grades of Stainless Steel
By industry standards, it has several grades to adapt to different use environments. They are:
- 200 series (Cr-Mn-Ni): 201, 202
- 300 series (Cr-Ni): 301, 302, 303, 304, 304L, 304N, 309, 309S, 310, 316, 316L, 321, 347
- 400 series (Cr): 408, 409, 410, 416, 420, 430, 440
Below is a table showing the different compositions.
| Grade | C Max | Mn Max | P Max | S Max | Si Max | Cr | Ni | Mo |
| 301 | 0.15 | 2.00 | 0.05 | 0.03 | 1.00 | 16.00-18.00 | 6.00-8.00 | |
| 302 | 0.15 | 2.00 | 0.04 | 0.03 | 1.00 | 17.00-19.00 | 8.00-10.00 | |
| 304 | 0.07 | 2.00 | 0.05 | 0.03 | 1.00 | 18.00-20.00 | 8.00-10.50 | |
| 304L | 0.03 | 2.00 | 0.05 | 0.03 | 1.00 | 18.00-20.00 | 9.00-13.00 | |
| 301S | 0.08 | 2.00 | 0.05 | 0.03 | 1.00 | 24.00-26.00 | 19.00-22.00 | |
| 316 | 0.08 | 2.00 | 0.05 | 0.03 | 1.00 | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 |
| 316L | 0.03 | 2.00 | 0.05 | 0.03 | 1.00 | 16.00-18.00 | 12.00-15.00 | 2.00-3.00 |
| 321 | 0.08 | 2.00 | 0.05 | 0.03 | 1.00 | 17.00-19.00 | 19.00-13.00 | |
| 430 | 0.12 | 1.00 | 0.04 | 0.03 | 0.75 | 16.00-18.00 |
Density of Stainless Steel
| Steel Grade | Density(g/cm3) |
| 201, 202, 304, 304L, 305, 321, 301, 302 | 7.93 |
| 316, 316L, 309S, 310S, 347 | 7.98 |
| 405, 410, 420 | 7.75 |
| 409, 430, 434 | 7.7 |
Weight of Stainless Steel Sheet
The weight of stainless steel sheet can be calculated by the following formula:
Weight (kg)= Thickness (mm)* width (m)* length (m)* density (g/cm3)
For example, if the SS304 sheet is 16 gauge (1.6mm) in thickness, 950mm in width, and 2.2m in length, its weight is about 26.52 kg (1.6*0.95*2.2*7.93).
The stainless steel weight per square meter differs with the thickness and the steel grade. For example, the weight of 0.64mm (24GA) SS304/304L per square meter is about 5 kg. While the weight of 0.48mm (26GA) SS316/316L is about 3.8 kg. Below is the gauge chart for your reference. If you want more details, please get in touch with us!
Stainless Steel Gauge Chart
| Gauge | Thickness (inch) | Thickness (mm) | Tolerance |
| 11 Gauge | 0.120” | 3.17mm | ± 0.005 |
| 12 Gauge | 0.109” | 2.78mm | ± 0.009 | ± 0.23mm |
| 14 Gauge | 0.078” | 1.98mm | ± 0.007 | ± 0.18mm |
| 16 Gauge | 0.063” | 1.59mm | ± 0.006 | ± 0.15mm |
| 18 Gauge | 0.050” | 1.27mm | ± 0.005 | ± 0.13mm |
| 20 Gauge | 0.038” | 0.95mm | ± 0.004 | ± 0.10mm |
| 22 Gauge | 0.031” | 0.79mm | ± 0.004 | ± 0.10mm |
| 24 Gauge | 0.025” | 0.64mm | ± 0.003 | ± 0.08mm |
| 26 Gauge | 0.018” | 0.476mm | ± 0.003 | ± 0.08mm |
| 28 Gauge | 0.0156” | 0.396mm | ± 0.002 | ± 0.07mm |
| 30 Gauge | 0.0125” | 0.32mm | ± 0.002 | ± 0.07mm |
Types of Stainless Steel
According to the processing method, the stainless steel is often manufactured by either hot rolled stainless steel sheet or cold rolled stainless steel sheet. Let’s see them below.
Hot Rolled Stainless Steel Coil
It is made from slab by roughing mill and finishing mill at the recrystallization temperature of steel about 1,100° C – 1,300° C. By hot rolling and coiling, the coil will get a softer surface finish, free of any oxide layers and impurities.
Cold Rolled Stainless Steel Coil
It is often processed based on the hot rolled stainless steel sheet. The coil will go through several processes like hot rolling, acid pickling, and cold rolling at room temperature. It can be made into a variety of cross-sectional forms to meet the different needs.
Hot Rolled VS Cold Rolled Stainless Steel
Different stainless steel manufacturers in China will offer both hot rolled and cold rolled stainless steel. Below are more differences for your reference.
1. Making Method
The former is made at high temperatures, while the latter is processed at average temperatures. It often decides the grade of the steel used for the manufacturing process.
2. Surface Treatment
Cold rolled stainless steel coils with good surface quality, no oxidation scales, and various surface treatments available. After pickling, there are oxidation scales on hot rolled stainless steel coils, and the surface is grayish or dark brown. And the smoothness of cold rolled stainless coil is higher than that of hot-rolled coil.
3. Mechanical Property
The mechanical property of hot-rolled stainless steel is much lower than that of cold-rolled stainless steel. The cold rolling possesses higher hardness.
4. Price
Cold rolled SS coil has higher toughness and surface quality than hot rolled SS coil and higher price than hot rolled coil. But the price also depends on the quality of the product. Different suppliers will offer different prices. For example, Wanzhi Steel can often offer factory sales prices for large orders compared to other SS coil manufacturers. Feel free to contact us for more details.
Surface Treatment
| Surface Finish | Features | Manufacturing Process | Applications |
| NO.1 | Silvery white, matt | Hot rolling | To meet the purpose that does not need gloss surface |
| NO.2D | Silvery white | Heat treatment and pickling after cold rolling | General uses or deep drawing uses |
| NO.2B | Surface brightness is better than that of NO. 2D | Go through polishing rollers after NO.2D treatment | General uses |
| BA | Bright as a mirror, excellent brightness | Bright annealing | Building materials, kitchen utensils |
| NO.3 | Better brightness | Polished with #100-120 abrasive belt | Building materials, electrical appliances and kitchen utensils |
| No.4 | Polished surface | Polished with #150-180 abrasive belt | Building materials, electrical appliances and kitchen utensils |
| HL | Hairline grinding | Polished with abrasive belt of grit #150-#320 | Building materials |
| NO.8 | Mirror Polishing | Polished with polishing wheel for a mirror | Decorative uses |
