AISI 201LN Stainless Steel Plate | 201LN China Mill Agent
What is AISI 201LN Stainless Steel Plate?
As a professional China Mill Agent and stainless steel plate supplier, SHH STEEL is pleased to present AISI 201LN Stainless Steel Plate.
AISI 201LN is a further optimized grade in the 201 series of austenitic stainless steels. It combines a low carbon content (for improved resistance to intergranular corrosion after welding) with intentional nitrogen addition (for solid-solution strengthening). The result is a material that offers higher yield and tensile strength than both standard AISI 201 and AISI 201L, while maintaining good formability, weldability and a lower nickel cost structure.
By using manganese and nitrogen to partially replace nickel, AISI 201LN delivers an economical austenitic stainless steel with enhanced mechanical properties. It is non-magnetic in the annealed condition and is suitable for applications where higher strength and better as-welded performance than conventional 201 are required, without moving up to the more expensive 304 or 316 families.
SHH STEEL, operating as a China Mill Agent, sources AISI 201LN directly from major Chinese stainless steel mills. This allows us to offer genuine mill-direct pricing, consistent quality, complete heat traceability and reliable delivery. We supply AISI 201LN in plate, sheet and coil form with a practical range of thicknesses and surface finishes.
AISI 201LN is frequently compared with astm a240 type 304l stainless steel sheet plate, astm a240 type 304ln stainless steel sheet plate, and standard astm a240 type 201 stainless steel sheet plate when projects seek an optimal balance of strength, weldability and cost.
Material Specification
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Grade | AISI 201LN / UNS S20153 | Confirmed |
| Related Standards | ASTM A240, ASME SA240, JIS, GB/T | Available |
| Product Form | Plate, Sheet, Coil | Available |
| Delivery Condition | Solution Annealed | Standard |
| Thickness Range | 0.4 mm – 50 mm (thicker available on request) | Custom sizes supported |
| Width | Up to 1500–2000 mm | Available |
| Length | Up to 6000 mm or coil / cut-to-length | Available |
| Surface Finish | 2B, BA, No.1, No.4, HL, Polished | Available |
| Certification | EN 10204 3.1 / Mill Test Certificate | Available |
Chemical Composition
Typical Chemical Composition of AISI 201LN:
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | 5.50 – 7.50 |
| Phosphorus (P) | ≤ 0.060 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 16.00 – 18.00 |
| Nickel (Ni) | 3.50 – 5.50 |
| Nitrogen (N) | 0.15 – 0.25 |
| Iron (Fe) | Balance |
The combination of low carbon (≤ 0.03%) and elevated nitrogen is the defining feature of AISI 201LN. Low carbon improves resistance to intergranular corrosion after welding, while nitrogen provides additional solid-solution strengthening, raising both yield and tensile strength above the levels of standard 201 and 201L. For comparison with higher-alloy options, see astm a240 type 316l stainless steel sheet plate and astm a240 type 316ti stainless steel sheet plate.
Mechanical Properties
Annealed Condition (typical values)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 550 MPa |
| Yield Strength (0.2%) | ≥ 290 – 310 MPa |
| Elongation (in 50 mm) | ≥ 35 – 40% |
| Hardness | ≤ 220 HB |
AISI 201LN offers clearly higher strength than both AISI 201L and conventional 304L, while still providing good ductility. This makes it attractive for applications where thickness reduction or higher load-bearing capacity is desired without switching to duplex grades such as astm a240 type 2205 stainless steel sheet plate.
Physical Properties
- Density: approximately 7.80–7.85 g/cm³
- Magnetic Response: Non-magnetic in the annealed condition
- Melting Range: approximately 1400–1450°C
Material Comparison
| Grade | Carbon | Nitrogen | Strength Level | Weldability | Cost Level | Typical Preference |
|---|---|---|---|---|---|---|
| AISI 201 | ≤ 0.15% | Low | High | Moderate | Lowest | General economical use |
| AISI 201L | ≤ 0.03% | Low | High | Improved | Low | Welded economical applications |
| AISI 201LN | ≤ 0.03% | Elevated | Higher | Improved | Low | Higher strength + good weldability |
| AISI 304L | ≤ 0.03% | Low | Standard | Excellent | Medium | Better corrosion resistance |
| AISI 304LN | ≤ 0.03% | Elevated | Higher | Excellent | Medium | Higher strength 304 family |
AISI 201LN sits at the top of the 201 series in terms of strength while retaining the low-carbon weldability advantage. When corrosion resistance becomes more critical, the usual upgrades are astm a240 type 304l stainless steel sheet plate or astm a240 type 316l stainless steel sheet plate. For significantly higher strength and chloride resistance, astm a240 type 2205 stainless steel sheet plate is often considered.
Corrosion Resistance
AISI 201LN provides good resistance to atmospheric corrosion, fresh water and many mild chemical environments. The low carbon content gives it better resistance to intergranular corrosion after welding than standard AISI 201.
Its overall corrosion performance remains below that of the 304 and 316 families, particularly in chloride-containing or acidic media. It is best suited for indoor, lightly corrosive or cost-driven applications. For more aggressive service conditions, customers typically move to astm a240 type 316l stainless steel sheet plate or astm a240 type 904l stainless steel sheet plate.
Weldability
AISI 201LN offers good weldability due to its low carbon content. The risk of intergranular corrosion in the as-welded condition is significantly reduced compared with standard 201.
Common fusion welding methods can be applied. Matching or 308L-type filler metals are frequently used. Proper post-weld cleaning is recommended. When maximum weld corrosion performance is required, many fabricators prefer astm a240 type 304l stainless steel sheet plate.
Heat Treatment
AISI 201LN is supplied in the solution-annealed condition.
Recommended Solution Annealing Parameters
- Temperature range: 1010 – 1120°C
- Holding time: Adequate to ensure uniform temperature
- Cooling: Rapid cooling (water quench preferred for thicker sections)
Correct solution annealing is important to retain nitrogen in solid solution and to optimize both strength and corrosion resistance.
Surface Finishes
| Finish | Description | Typical Use / Keywords |
|---|---|---|
| 2B | Cold-rolled, annealed, pickled, skin-passed | AISI 201LN 2B – most common for general fabrication |
| BA | Bright Annealed | AISI 201LN BA – decorative and kitchen applications |
| No.1 | Hot-rolled, annealed and pickled | AISI 201LN No.1 – industrial plate |
| No.4 | Brushed finish | AISI 201LN No.4 – architectural surfaces |
| HL | Hairline finish | AISI 201LN HL – decorative panels |
| Polished | Mirror or custom polish | AISI 201LN Polished – high-end applications |
SHH STEEL regularly supplies AISI 201LN in 2B and BA finishes. Other finishes can be arranged. Related decorative grades such as astm a240 type 430 stainless steel sheet plate and astm a240 type 439 stainless steel sheet plate are also available.
Tolerances
Dimensional tolerances for AISI 201LN Stainless Steel Plate generally follow ASTM A480 practices.
Typical available size range:
- Thickness: 0.4 mm – 50 mm
- Width: up to 1500–2000 mm
- Length: up to 6000 mm or coil / cut-to-length
SHH STEEL provides precise dimensional control and can support tighter tolerances when required.
Equivalent Material Grades
| Grade / Designation | Standard / UNS | Notes |
|---|---|---|
| AISI 201LN | — | — |
| UNS S20153 | — | Unified Numbering System |
| Related 201LN grades | ASTM A240 / GB / JIS | When dual certified or equivalent |
Related grades for comparison include astm a240 type 304ln stainless steel sheet plate, astm a240 type 304l stainless steel sheet plate, astm a240 type 201 stainless steel sheet plate, and astm a240 type 316l stainless steel sheet plate.
Applications
AISI 201LN is used in applications that benefit from higher strength and good weldability at an economical cost. Typical applications include:
| Industry / Sector | Typical Components / Equipment |
|---|---|
| Kitchen & Food Equipment | Welded structures, tabletops, processing equipment |
| Architecture & Construction | Decorative and semi-structural panels |
| Transportation | Interior and structural components |
| Household Appliances | Strength-critical formed parts |
| General Fabrication | Tanks, frames, enclosures and welded assemblies |
| Light Industrial Equipment | Housings and non-critical process equipment |
Supporting industry solutions can be found on our construction industry and equipment manufacturing pages. Fabrication support is available through steel cutting services and steel welding services.
Why Choose SHH STEEL
SHH STEEL is a China Mill Agent specializing in stainless steel plate and sheet. By working directly with major Chinese stainless steel mills, we supply AISI 201LN with the following advantages:
- Genuine China Mill Agent / mill-direct pricing
- Consistent quality and complete heat traceability
- Full Mill Test Certificates (EN 10204 3.1)
- Flexible dimensions and surface finishes (including AISI 201LN 2B and AISI 201LN BA)
- Technical support for selection among 201, 201L, 201LN, 304L and 316L
- Value-added services including steel cutting services, stainless surface finishing services and worldwide shipping service
FAQ
- What is the main advantage of AISI 201LN over AISI 201L?AISI 201LN contains higher nitrogen, which increases yield and tensile strength while retaining the low-carbon weldability benefit of 201L. SHH STEEL recommends 201LN when higher strength is required.
- How does AISI 201LN compare with 304LN?304LN offers better corrosion resistance due to higher nickel content, while 201LN provides a more economical solution with still attractive strength. SHH STEEL can help evaluate the best choice for the specific environment.
- Is AISI 201LN magnetic?Non-magnetic in the annealed condition. It may become slightly magnetic after heavy cold working.
- What is the density of AISI 201LN?Approximately 7.80–7.85 g/cm³.
- Does SHH STEEL provide dual certification for AISI 201LN?Yes, dual certification is available upon request.
Conclusion
AISI 201LN Stainless Steel Plate is a low-carbon, nitrogen-strengthened austenitic grade that delivers higher strength than standard 201 and 201L, together with improved weldability and good formability. It offers a cost-effective solution for applications requiring elevated mechanical properties without the full expense of the 304 or 316 families.
As a professional China Mill Agent, SHH STEEL supplies high-quality AISI 201LN Stainless Steel Plate with genuine mill-direct pricing, full certification and reliable technical support.
Contact SHH STEEL today for stock availability, surface finish options (including AISI 201LN 2B and AISI 201LN BA), processing services or a competitive quotation.
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