Wiki - Interior and exterior trends
Compare stainless steel 201 and stainless steel 304 - 5 ways to distinguish
Stainless steel 201 and 304 are often two popular choices when it comes to stainless steel materials. They have differences in chemical composition, physical properties and mechanical properties. To distinguish between stainless steel 201 and stainless steel 304, you can use a solution, use a metal shot machine, use a magnet, a cutting machine and most accurately, take it to a component testing center.
Let's explore with Kosmos the diversity and characteristics of these two materials.
Compare stainless steel 201 and 304
According to Kosmos statistics from Google Trend, a tool that analyzes consumer keyword searches shows that 304 stainless steel has significantly more searches than 201 stainless steel. That also shows that 304 stainless steel is used. more widely used and popular.
Although both are stainless steel, they still have their own characteristics on chemical composition, physical properties and mechanical properties. Let's compare stainless steel 201 and 304 to have a more detailed overview of these two materials.
Chemical composition
Based on ASTM A240 standard, the difference between stainless steel 201 and 304 in chemical composition can be seen as follows.
Ingredient (%) | Stainless Steel AISI201 | Stainless Steel AISI304 |
Carbon (C) | ≤ 0.15% | ≤ 0.08% |
Manganese (Mn) | ≤ 5.5 – 7.5% | ≤ 2.00% |
Phosphorus (P) | ≤ 0.06% | ≤ 0.045% |
Sulfur (S) | ≤ 0.03% | ≤ 0.03% |
Silicone (Si) | ≤ 1.00% | ≤ 1.00% |
Chromium (Cr) | 16 - 18% | 18.0 - 20.0% |
Nickel (Ni) | 4 - 6% | 8.0 - 10.5% |
Nitrogen (N) | ≤ 0.10 % | ≤ 0.10 % |
Copper (Cu) | ≤ 0.5 % | ≤ 0.5 % |
Iron (Fe) | Remain | Remain |
Physical properties
Below is a comparison table of the physical properties of the two types stainless steel 201 and 304.
Steel Marks | Stainless Steel AISI304 | Stainless Steel AISI201 |
Density (kg/m3) | 8000 | 7860 |
Elastic Modulus (GPa) – Elastic Modulus | 193 | 197 |
Thermal Expansion (μm/m/°C) – Thermal Expansion From 0-100 °C | 17.2 | 16.6 |
Thermal Conductivity at 100 °C (W/mK) | 16.2 | 16.3 |
Specific Heat – Specific Heat 0-100 °C from 0 – 100 degrees C (J/kg.K) | 500 | 502 |
Electrical Resistivity (nΩ.m) | 720 | 685 |
Tensile strength (MPa) | 515 | 685 |
Minimum elastic force – Yield strength 0.2% – Proof (MPa) | 205 | 292 |
Compressive strength (MPa) | 205 – 310 | 365 |
Elongation at break rate – Elongation at break | 40% | 56% |
Hardness Rockwell B max – Hardness Rockwell B max | 92 | 100 |
Mechanical properties
Below is a comparison table of mechanical properties stainless steel 201 and stainless steel 304.
Comparative Criteria | Stainless Steel AISI201 | Stainless Steel AISI304 |
Shape | Shaped with similar methods | |
Welding ability | Weld well with conventional welding techniques and fusion welding | |
The temperature required to shape the product | 1.149 - 1.232 degrees C | 750 - 1.150 degrees C |
Annealing temperature | 1.010 - 1.093 degrees C | 1.010 - 1.120 degrees C |
The data from the 3 tables above are quite specialized. So let Customers know stainless steel 304 and 201 Which one is better, Kosmos has also researched and concluded the following table.
Criteria | Rating |
Price | Stainless steel 304 is more expensive than stainless steel 201 because it contains nickel |
Color | Stainless steel 304 has a brighter surface than stainless steel 201 |
Stiffness | Stainless steel 201 is harder than stainless steel 304 |
Weight | Stainless steel 304 weighs more than stainless steel 201 |
Elasticity | Stainless steel 201 is about 304% better than stainless steel 2 |
Expansion | Stainless steel 201 is about 304% weaker than stainless steel 3 |
Thermal conductivity | Similar |
Electrical conductivity | Stainless steel 201 is about 304% better than stainless steel 5 |
Anti-rust ability | Stainless steel 304 resists rust better than stainless steel 201 because it contains Chromium and Sulfur |
Resistance to surface pitting | Stainless steel 304 is more resistant to pitting than stainless steel 201 |
How to distinguish stainless steel 201 and 304
To distinguish between 304 and 201 stainless steel, five effective ways that you can refer to are:
- Use test solution
- Use a metal shot machine
- Use magnets
- Cutting machines
- Take it to a component testing center
Use solution
A common way to distinguish between 201 and 304 stainless steel is to use a test solution. When exposed to stainless steel 201 and 304, they will react differently.
- Stainless steel 201: The solution changes from blue to pink.
- Stainless steel 304: The solution remains blue.
Use a metal shot machine
With the development of technology, people have invented a metal shooting machine to determine the internal composition of stainless steel. The way this machine works is to emit an X-ray and receive back fluorescent radiation from the metal.
Stainless steel 201 and 304 have different compositions, so they will emit light rays with different wavelengths. By using these wavelengths, the device can analyze the composition and content of substances in metals, helping to distinguish between 201 and 304 stainless steel alloys.
Use magnets
Using a magnet is a quick way to distinguish these two types of stainless steel. We bring the magnet close to stainless steel 2 and stainless steel 201. The results show:
- Stainless steel 304 is not attracted to magnets (or is attracted very slightly)
- Stainless steel 201 is attracted to magnets more strongly than stainless steel 304
Use a cutter
When using a cutting machine to cut 201 stainless steel, it often produces sparks due to its high iron content. In contrast, 304 stainless steel usually does not create this phenomenon when cut because it has more nickel and chromium content.
Take it to a component testing center
If you need absolute accuracy, you should take the test sample to a testing center such as Vinacontrol, because it is fully equipped with modern equipment and machinery, helping to return the most accurate results. However, this method also has some limitations: it takes time to get tested and not all provinces have testing centers.
You can refer to the above distinctions to buy the right product for your needs. If you have any questions, please comment below, Kosmos Will respond immediately upon receiving information
- https://www.linkedin.com/pulse/difference-between-304-stainless-steel-201-artemis-kuang
- https://vi.wikipedia.org/wiki/Th%C3%A9p_kh%C3%B4ng_g%E1%BB%89
- https://en.wikipedia.org/wiki/SAE_304_stainless_steel
- https://inoxquangminh.com/so-sanh-va-phan-biet-inox-304-va-201/#Co_the_nhan_biet_phan_biet_inox_201_va_304_bang_nam_cham_hay_khong
- https://inoxtanthanhlong.com/tin-tuc/su-khac-nhau-giua-inox-304-va-inox-201-tai-sao-inox-304-lai-dat-hon.html
- https://ihbi.com.vn/inox-201-la-gi-inox-304-la-gi-so-sanh-su-khac-biet-giua-inox-sus-201-va-sus-304/?lang=vi
- https://petnorlng.com/so-sanh-inox-201-va-304
- https://hobbyhome.vn/blogs/news/12-cach-phan-biet-inox-304-va-inox-201
Kim Hoa is an expert in interior and exterior decorative materials at Kosmos Vietnam. She has professional knowledge of interior design and loves finding creative ways to optimize space with simple construction decoration materials such as wood, stone, bamboo, brick and plastic.
Kim Hoa Regularly participate in seminars and exhibitions on interior decoration materials to update the latest trends, as well as to learn more about interior decoration materials. Meet interior and exterior designers, architects, and material experts to continuously learn. She also actively shares her knowledge and experience on social media channels such as Facebook, YouTube, Tiktok... with more than 100 thousand followers.
Mission of Kim Hoa not merely providing information, but also ensuring that All information posted is quality, has in-depth investment and is most useful to viewers.
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