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Sus201 Material
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SUS201 material is a chromium-manganese-nickel austenitic stainless steel in the JIS grade system. Its main material feature is lower nickel than SUS304, with higher manganese and nitrogen used to maintain the austenitic structure. For a quick material check, the most useful data are chemical composition, tensile strength, yield strength, elongation, and magnetic behavior after cold working. :contentReference[oaicite:0]{index=0}
SUS201 Material Data Card
This is a quick material card, rather than a full JIS G4305 specification sheet. It is intended for fast grade identification and comparison before a detailed purchase specification is prepared.
| Property | SUS201 | Material position |
|---|---|---|
| Material family | Austenitic stainless steel | Cr-Mn-Ni 200-series stainless |
| Cr | 16.00–18.00% | Main corrosion-resistance element |
| Ni | 3.50–5.50% | Lower than SUS304 |
| Mn | 5.50–7.50% | Higher than SUS304 |
| C | ≤ 0.15% | JIS grade limit |
| Si | ≤ 1.00% | JIS grade limit |
| N | ≤ 0.25% | Supports austenitic stability |
| Tensile strength | ≥ 520 MPa | Typical JIS requirement for annealed flat products |
| 0.2% proof strength | ≥ 275 MPa | Higher than SUS304 in the common JIS comparison |
| Elongation | ≥ 40% | Typical annealed requirement |
The chemical limits above are commonly listed for SUS201 in the JIS system, while mechanical values depend on the applicable JIS product standard and delivery condition. Therefore, the material card should not replace the actual standard and mill certificate for procurement. :contentReference[oaicite:1]{index=1}
SUS201 vs SUS304: Quick Data Comparison
The fastest way to understand the two grades is to compare their nickel, manganese, strength, and elongation. Both are austenitic stainless steels, but their alloy design is different.
| Data | SUS201 | SUS304 | Quick reading |
|---|---|---|---|
| Cr | 16.00–18.00% | 18.00–20.00% | 304 has higher Cr |
| Ni | 3.50–5.50% | 8.00–10.50% | Main alloy-design difference |
| Mn | 5.50–7.50% | ≤ 2.00% | 201 uses more Mn |
| Tensile strength | ≥ 520 MPa | ≥ 520 MPa | Similar minimum value |
| 0.2% proof strength | ≥ 275 MPa | ≥ 205 MPa | 201 has higher minimum yield/proof strength |
| Elongation | ≥ 40% | ≥ 40% | Similar minimum elongation |
| Nominal structure | Austenitic | Austenitic | Both belong to the austenitic family |
The comparison shows an important point: lower nickel does not mean lower strength in every test. In the common JIS annealed comparison, SUS201 has a higher minimum proof strength, while the minimum tensile strength and elongation are similar to SUS304. :contentReference[oaicite:2]{index=2}
Why Does SUS201 Use Less Nickel?
Nickel is a major alloying element in conventional austenitic stainless steel. In SUS201, part of the nickel content is reduced and the alloy uses more manganese and nitrogen to support the austenitic structure.
The typical Ni range is 3.50–5.50%, compared with 8.00–10.50% for SUS304.
Manganese is increased to 5.50–7.50% in the JIS SUS201 composition.
Nitrogen is controlled up to 0.25% and contributes to the alloy's austenitic design.
This composition gives the grade a distinct position in the 200-series stainless family. However, it should not be interpreted as a direct substitute for SUS304 in every corrosive environment. The lower Cr and Ni levels provide a smaller corrosion-resistance margin in many demanding conditions.
SUS201 and Magnetism
Annealed SUS201 is generally austenitic and has low magnetic response, but cold working can make it noticeably magnetic. Rolling, bending, stamping, drawing, and other deformation processes can transform part of the austenitic structure and increase magnetic permeability.
This is particularly relevant when a buyer compares a finished SUS201 component with an annealed sheet. The magnetic response can change after forming, so “magnetic” does not automatically mean that the material is ferritic stainless steel.
Where SUS201 Sits in the JIS Grade System
In the JIS stainless steel designation system, SUS identifies stainless steel, while the numerical grade identifies the alloy. SUS201 therefore belongs to the 200-series austenitic stainless group. SUS304 belongs to the 300-series austenitic group.
| JIS grade | Family | General alloy position |
|---|---|---|
| SUS201 | 200 series, austenitic | Lower-Ni, higher-Mn design |
| SUS304 | 300 series, austenitic | Cr-Ni mainstream austenitic grade |
| SUS316 | 300 series, austenitic | Mo-bearing grade for higher corrosion resistance |
| SUS430 | 400 series, ferritic | Different structure and magnetic behavior |
Common SUS201 Applications
The grade is commonly selected where a combination of stainless appearance, formability, useful strength, and controlled material cost is required, while the service environment is not highly aggressive.
Utensils, sinks, containers, appliances, and other general stainless components.
Trim, panels, architectural details, and appearance-focused components.
Stamped, bent, formed, and general-purpose stainless steel components.
Applications where moderate corrosion resistance is sufficient for the service environment.
For applications exposed to salt, chlorides, strong chemicals, or demanding outdoor conditions, grade selection should be based on the actual corrosion environment rather than on the material name alone.
SUS201 Material: What to Check Before Buying
A quick data card is useful for grade screening, but a commercial order should contain the complete technical requirement. Check the JIS grade, applicable product standard, thickness, width, surface finish, delivery condition, quantity, and certificate requirement.
SUS201 Material Supply from Teda Ganghua
Teda Ganghua supports B2B stainless steel sourcing for buyers who need clearly defined grades, dimensions, surface conditions, and inspection documents. For SUS201 material, the supply specification can be matched to the customer's required JIS grade and product form, including sheet, coil, and strip requirements.
For a quotation, buyers can provide the grade, standard, thickness, width, surface finish, quantity, delivery form, and certificate requirements. This helps prevent confusion between genuine JIS SUS201 and other commercially labeled 201 materials. Explore the available stainless steel products and send the required material specification for sourcing.
FAQ: SUS201 Material
Is SUS201 the same as SUS304?
No. Both are austenitic stainless steels, but SUS201 contains much less nickel and more manganese. SUS304 also has a higher chromium range. Their corrosion performance and material positioning are therefore different.
Does SUS201 have magnetism?
Annealed material generally has low magnetic response, but cold working can increase magnetism. Therefore, magnetic attraction alone cannot be used to determine whether a material is SUS201.
Is SUS201 stronger than SUS304?
In the common JIS annealed comparison, the minimum 0.2% proof strength of SUS201 is higher than that of SUS304, while both have similar minimum tensile strength and elongation requirements. Actual properties depend on the applicable product standard and condition.
What is the main difference between SUS201 and SUS304?
The clearest chemical difference is nickel. SUS201 typically contains 3.50–5.50% Ni, while SUS304 contains 8.00–10.50% Ni. SUS201 also uses substantially more manganese.
Can SUS201 replace SUS304?
Not automatically. The correct choice depends on corrosion exposure, forming requirements, strength, appearance, service conditions, and the customer's specification. SUS201 is better treated as a separate grade rather than a universal replacement for SUS304.
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