What are the differences between 201 stainless steel and 304 stainless steel?
What are the differences between 201 stainless steel and 304 stainless steel?
Both 201 and 304 stainless steel are austenitic stainless steels, but 304 stainless steel has a higher nickel content (8-10.5%) and chromium content (18-20%), thus offering superior corrosion resistance. 201 stainless steel (with lower nickel content and higher manganese content) has higher strength, greater hardness, and stronger rigidity, and is more cost-effective, making it suitable for indoor environments with lower corrosive conditions, such as hardware components. 304 stainless steel, on the other hand, is suitable for harsh environments and electrical equipment.
Is 304 stainless steel good quality?
In addition to its corrosion resistance, 304-grade stainless steel also possesses excellent mechanical properties, weldability, and formability. It has a considerably high tensile strength, making it widely used in various fields. Its mechanical properties can only be improved through cold working. 304-grade stainless steel is in high demand in the food industry.
201 Stainless Steel
The commonly available 201 stainless steel is an austenitic stainless steel. Its main components include 16-18% chromium and 4-6% nickel. The main characteristics of 201 stainless steel are its relatively low cost while still maintaining a certain level of corrosion resistance.
304 Stainless Steel
304 stainless steel is one of the most widely used austenitic stainless steels. It is also known as 18/8 stainless steel, containing over 18% chromium and over 8% nickel, and is therefore non-magnetic. It is known for its excellent corrosion resistance, durability, and good formability. Therefore, it is considered a higher-grade material for stainless steel cookware.
Chemical composition of 201 stainless steel and 304 stainless steel
| Element | Stainless Steel 201 | Stainless Steel 304 |
|---|---|---|
| Carbon (C) | 0.15 | 0.07 |
| Chromium (Cr) | 16.0 – 18.0 | 17.5 – 19.5 |
| Nickel (Ni) | 3.5 – 5.5 | 8.0 – 10.5 |
| Manganese (Mn) | 5.50 – 7.50 | 2.00 |
| Silicon (Si) | 1.00 | 0.75 |
| Nitrogen (N) | 0.25 | 0.10 |
| Phosphorus (P) | 0.060 | 0.045 |
| Sulfur (S) | 0.030 | 0.030 |
Mechanical Properties Of 201 Vs 304 Stainless Steel
| Property | Stainless Steel 201 | Stainless Steel 304 |
|---|---|---|
| Yield Strength, min. (ksi) | 45 | 30 |
| Tensile Strength, min. (ksi) | 95 | 75 |
| Elongation, min. (%) | 40 | 40 |
| Hardness, max. (Rb) | 100 | 92 |
Comparison of Physical Properties of 201 Stainless Steel and 304 Stainless Steel
| Property | Stainless Steel 201 | Stainless Steel 304 |
|---|---|---|
| Density (lb/in³) | 0.283 | 0.285 |
| Modulus of Elasticity (psi) | 28.6×10628.6×106 | 28×10628×106 |
| Coefficient of Thermal Expansion (68–212°F, /°F) | 9.2×10−69.2×10−6 | 9.2×10−69.2×10−6 |
| Thermal Conductivity (Btu/ft·hr·°F) | 9.4 | 9.4 |
| Specific Heat (Btu/lb·°F) | 0.12 | 0.12 |
| Electrical Resistivity (Microohm·in) | 27.0 | 28.3 |
Applications:
304-grade stainless steel: Kitchen sinks, household appliances, food processing equipment, chemical storage tanks, architectural decorative components (due to its excellent corrosion resistance).
201-grade stainless steel: Door handles, interior architectural decorative components, automotive trim, structural components in dry areas (due to its lower cost and moderate strength).
In short, choose 304-grade stainless steel when corrosion resistance is required in harsh environments; choose 201-grade stainless steel for applications in less corrosive environments, indoor use, and where a balance of strength and cost is needed.
Gnee Steel specializes in the production and sale of various stainless steel products, including 304, 316, 321, 904, 904L, 2205 duplex stainless steel, and 316L stainless steel. Gnee Steel's products are widely used in kitchens, aerospace, chemical, power generation, automotive, and nuclear energy industries. We also provide customized stainless steel solutions based on customer needs. For inquiries about stainless steel prices or customized alloy solutions, please email ru@gneesteelgroup.com for a quote.