What is SUS 304 stainless steel?
SUS304 stainless steel is 304 stainless steel, which is austenitic stainless steel, containing chromium and nickel, corrosion-resistant and easy to process. It is widely used in chemical, food, medical and other fields.SUS304 stainless steel is the material standard of Japan. 304 stainless steel is a stainless steel grade produced according to the American ASTM standard. SUS304 is equivalent to my country's (0Cr18Ni9) stainless steel.
What is the equivalent standard of SUS304?
| Grade | Standard Source | Full Name | International Equivalent |
|---|---|---|---|
| SUS304 | Japanese Industrial Standard (JIS) | Steel Use Stainless 304 | AISI 304 (U.S. Standard) |
| SS304 | U.S./International Common Abbreviation | Stainless Steel 304 | EN 1.4301 (European Standard) |
| Element | SUS304 (JIS) | SS304 (ASTM/EN) |
|---|---|---|
| Carbon (C) | ≤ 0.08% | ≤ 0.07% |
| Silicon (Si) | ≤ 1.00% | ≤ 0.75% |
| Manganese (Mn) | ≤ 2.00% | ≤ 2.00% |
| Phosphorus (P) | ≤ 0.045% | ≤ 0.045% |
| Sulfur (S) | ≤ 0.03% | ≤ 0.03% |
| Chromium (Cr) | 18.00–20.00% | 17.50–19.50% |
| Nickel (Ni) | 8.00–10.50% | 8.00–10.50% |
| Density | 7.8–8.2 g/cm³ |
| Melting Point | 1,230–1,480°C |
| Specific Heat | 440–500 J/kg·℃ |
| Electrical Resistivity | 7.3×10⁻⁷–8.5×10⁻⁷ Ω·m (at 20℃) |
| Coefficient of Thermal Expansion | 1.7×10⁻⁵–1.9×10⁻⁵ 1/K |
| Thermal Conductivity | 14–20 W/m·K |
Can SUS304 and SS304 be used interchangeably?
In general scenarios, they can be used interchangeably, but it is necessary to ensure that they meet the certification requirements of the target market (such as EN 1.4301 for export to the EU).
Which one is more expensive, SUS304 or SS304?
The prices are similar for the same specifications, but SS304 may be slightly more expensive if it contains additional certifications (such as ASME).
SUS304 stainless steel high temperature resistance
The short-term use temperature can reach 870℃, and the long-term working temperature is ≤538℃, which is better than 304L (low carbon version).
SUS304 stainless steel heat treatment process
Solution treatment: Generally, SUS304 is heated to between 1010℃-1150℃, kept warm for a certain period of time, and then quickly cooled, usually by water cooling or air cooling. Solution treatment can fully dissolve the alloy elements in austenite, eliminate stress and cold working hardening, and improve the corrosion resistance and toughness of steel.
Application of SUS304and ss304 stainless steel
SUS304 is widely used in food, chemical, atomic energy and other industrial equipment and decoration fields as well as household goods, cabinets, indoor pipelines, water heaters, boilers, bathtubs, auto parts, medical equipment, building materials, chemistry, food industry, agriculture, and ship parts.
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