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304 Stainless Steel Coil For Industrial and Commercial Use
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304 Stainless Steel Coil Description
304 stainless steel coil is among the most widely used steel coils worldwide due to its advantageous properties. Composed primarily of iron, chromium, and nickel, 304 stainless steel offers exceptional oxidation and corrosion resistance. It outperforms 200 series stainless steels in rust resistance and provides superior high-temperature stability. Known for its smooth surface, high plasticity, toughness, and mechanical strength, 304 stainless steel coil resists corrosion from acids, alkaline gases, solutions, and various other media. Its versatility and relatively low cost make it a popular choice in applications such as food processing equipment, building materials, and automotive components.
Product Parameters
| Product Name | 304 Stainless Steel Coil |
| Type | Steel Coil |
| Thickness | 2.5mm-10.0mm |
| Length | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc. |
| Width | 610mm-2000mm |
| Standard | ASTM, AISI, JIS, GB, DIN, EN, etc. |
| Surface | BA, 2B, NO.1, NO.4, 4K, HL, 8K, etc. |
| Scope of Application | Widely used in high temperature and electrical industry, medical equipment construction, chemical, food industry, agriculture and ship parts, food and beverage packaging, Kitchen supplies, trains, airplanes, conveyor belts, vehicles, bolts, nuts, springs and screens, etc. |
| Certificate | ISO, SGS, BV, etc. |
| Production Technology | Hot Rolling, Cold Rolling |
| Edge Processing | Edging, Trimming |
Chemical Composition
| C | Si | Mn | Cr | Ni | S | P |
| ≤ 0.08 | ≤1.0 | ≤ 2.0 | 18.0～20.0 | 8.0～10.5 | ≤ 0.03 | ≤ 0.035 |
Mechanical Properties
| Tensile Strength Kb (MPa) | Yield Strength σ0.2 (MPa) | Elongation D5 (%) | Hardness |
| ≥ 520 | ≥ 205 | ≥ 40 | ≤ 187HB ;≤ 90HRB;≤ 200HV |
Physical Performance
| Density(g/cm³) | Modulus of Elasticity(Gpa) | Coefficient of Thermal Expansion(10-6/°C) | Coefficient of Thermal Conductivity(W/m*K) | Resistivity(ΜΩ. cm) |
| 8.03 | 193 | 16.9 | 16.2 | 72 |
Surface Selection
Here are the main methods for detecting 304 stainless steel
Spark Testing Method: Compare the sparks produced by 304 stainless steel and 201 stainless steel when subjected to a high-speed grinding wheel. Due to the high temperature from friction, the quantity and shape of the sparks vary depending on the material’s elemental composition, allowing for identification of the material type and approximate content.
Stainless Steel Test Solution Method: Purchase a stainless steel test solution from a specialty store (e.g., Jiangtou Fansheng or Xinyongsheng) for around 15 RMB per bottle. Apply the solution to both 304 and 201 stainless steel samples. After 2-3 minutes, the solution will change color, enabling differentiation of the materials. Refer to the instructions for comparison.
These two methods are among the simplest and most effective for identifying stainless steel.
Additional methods include:
Visual Inspection: Check the surface of the item for rust. If there is no rust, it can be confirmed as stainless steel, but this does not definitively identify the specific type.
Test Solution Detection: There are commercial test solutions available that, when applied to the material, change color based on the type of stainless steel. This method is straightforward and convenient for preliminary identification.
Grinding Test: Observe the sparks produced when grinding the material with a wheel. This method requires experienced personnel to interpret the results, as the spark patterns can be difficult to analyze accurately.
Spectral Analysis: This is the most accurate method. First, use a grinder to remove a layer from the surface, ensuring it is smooth. Then, use a spectrometer to analyze the metal elements in the material. This method provides detailed readings and is the most reliable and authoritative for determining material composition.
