AISI 201L Stainless Steel Plate | 201L China Mill Agent
What is AISI 201L Stainless Steel Plate?
As a professional China Mill Agent and stainless steel plate supplier, SHH STEEL is pleased to present AISI 201L Stainless Steel Plate.
AISI 201L is the low-carbon version of the popular AISI 201 austenitic stainless steel. By limiting the carbon content to a maximum of 0.03%, AISI 201L significantly improves resistance to intergranular corrosion after welding, while retaining the key advantages of the 201 family — higher strength than 304, good formability, and a more economical cost structure due to reduced nickel content.
The grade maintains an austenitic microstructure through the combined addition of chromium, manganese, nitrogen and a moderate level of nickel. It is non-magnetic in the annealed condition and offers an attractive balance of mechanical properties and cost for applications where the corrosion resistance of 304 is not fully required.
SHH STEEL, acting as a China Mill Agent, sources AISI 201L directly from major Chinese stainless steel mills. This supply model allows us to provide genuine mill-direct pricing, consistent quality, complete heat traceability and reliable delivery schedules. We supply AISI 201L in plate, sheet and coil form across a practical range of thicknesses and surface finishes to meet both industrial and commercial project requirements.
Compared with standard AISI 201, the low-carbon 201L version is preferred whenever welding is involved or when the fabricated component will operate in environments where intergranular corrosion could become a concern. It is frequently evaluated alongside astm a240 type 304l stainless steel sheet plate and astm a240 type 201 stainless steel sheet plate when cost optimization is a priority.
Material Specification
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Grade | AISI 201L / UNS S20103 | Confirmed |
| Related Standards | ASTM A240, ASME SA240, JIS G4305, GB/T 3280 | 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 |
AISI 201L is commonly dual-certified or cross-referenced with ASTM A240 Type 201L when project specifications require it. Related product pages for comparison include astm a240 type 304 stainless steel sheet plate and astm a240 type 304ln stainless steel sheet plate.
Chemical Composition
Chemical Composition
Typical Chemical Composition of AISI 201L (UNS S20103):
| 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) | ≤ 0.25 |
| Iron (Fe) | Balance |
The decisive difference from standard AISI 201 is the strict limitation of carbon to ≤ 0.03%. This low carbon level, combined with the manganese-nitrogen strengthening system, gives AISI 201L improved resistance to intergranular corrosion after welding while preserving the economical alloy design of the 201 series. For higher corrosion performance, many customers also evaluate astm a240 type 316l stainless steel sheet plate or astm a240 type 316ti stainless steel sheet plate.
Mechanical Properties
Annealed Condition (typical values)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa (75 ksi) |
| Yield Strength (0.2%) | ≥ 260 – 275 MPa |
| Elongation (in 50 mm) | ≥ 40% |
| Hardness | ≤ 217 HB |
AISI 201L retains the higher strength characteristic of the 201 family compared with conventional 304L. This higher yield strength can allow designers to reduce thickness in non-critical applications, contributing to further cost savings. When higher strength combined with better corrosion resistance is required, customers often compare it with 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 | Nickel | Strength | Weldability & IGC Resistance | Cost Level | Typical Use Case |
|---|---|---|---|---|---|---|
| AISI 201 | ≤ 0.15% | 3.5–5.5% | Higher | Moderate | Low | General economical applications |
| AISI 201L | ≤ 0.03% | 3.5–5.5% | Higher | Improved | Low | Welded economical applications |
| AISI 304 | ≤ 0.08% | 8–10.5% | Standard | Good | Medium | General purpose |
| AISI 304L | ≤ 0.03% | 8–12% | Standard | Excellent | Medium | Heavy welding, better corrosion |
| AISI 301 | ≤ 0.15% | 6–8% | High (work hardenable) | Good | Medium | High-strength structural |
AISI 201L is positioned as the low-carbon, more weldable version of AISI 201. When the service environment becomes more corrosive, the logical upgrades are astm a240 type 304l stainless steel sheet plate or astm a240 type 316l stainless steel sheet plate. For applications requiring significantly higher strength and chloride resistance, astm a240 type 2205 stainless steel sheet plate or astm a240 type 2507 stainless steel sheet plate are commonly considered.
Corrosion Resistance
AISI 201L provides good resistance to atmospheric corrosion, fresh water and many mild chemical media. The low carbon content improves resistance to intergranular corrosion in the as-welded condition compared with standard AISI 201.
However, its overall corrosion resistance remains lower than that of the 304 and 316 families, especially in chloride-containing or acidic environments. It is best suited for indoor applications, lightly corrosive industrial atmospheres, food equipment (non-critical), and architectural components where cost is a primary driver. For more demanding corrosion service, astm a240 type 316l stainless steel sheet plate or astm a240 type 904l stainless steel sheet plate should be evaluated.
Weldability
AISI 201L offers noticeably better weldability than standard AISI 201 because of its low carbon content. The risk of intergranular corrosion after welding is substantially reduced, making it suitable for multi-pass welding and fabricated structures.
Common welding processes (TIG, MIG, resistance welding, etc.) can be used. Matching or 308L-type filler metals are frequently selected. Proper cleaning after welding is recommended to maintain surface corrosion resistance. When higher weld integrity and corrosion performance are required, many fabricators move to astm a240 type 304l stainless steel sheet plate or astm a240 type 316l stainless steel sheet plate.
Heat Treatment
AISI 201L is supplied in the solution-annealed condition.
Recommended Solution Annealing Parameters
- Temperature range: 1010 – 1120°C
- Holding time: Sufficient to equalize temperature through the cross-section
- Cooling: Rapid cooling (water quenching preferred for thicker plates)
Proper solution annealing restores ductility after cold working and maximizes corrosion resistance. Over-heating or slow cooling should be avoided.
Surface Finishes
| Finish | Description | Typical Use / Keywords |
|---|---|---|
| 2B | Cold-rolled, annealed, pickled, skin-passed | AISI 201L 2B – most common for general fabrication |
| BA | Bright Annealed | AISI 201L BA – decorative and kitchen applications |
| No.1 | Hot-rolled, annealed and pickled | AISI 201L No.1 – industrial plate |
| No.4 | Brushed finish | AISI 201L No.4 – architectural surfaces |
| HL | Hairline finish | AISI 201L HL – decorative panels |
| Polished | Mirror or custom polish | AISI 201L Polished – high-end applications |
SHH STEEL regularly supplies AISI 201L in 2B and BA finishes. Other finishes can be arranged according to project requirements. Related surface-critical grades such as astm a240 type 430 stainless steel sheet plate and astm a240 type 439 stainless steel sheet plate are also available for decorative applications.
Tolerances
Dimensional tolerances for AISI 201L Stainless Steel Plate generally follow ASTM A480 practices.
Typical available size range for AISI 201L:
- Thickness: 0.4 mm – 50 mm
- Width: up to 1500–2000 mm
- Length: up to 6000 mm or supplied in coil / cut-to-length
SHH STEEL maintains precise dimensional control and can support tighter tolerances when required by the project.
Equivalent Material Grades
| Grade / Designation | Standard / UNS | Notes |
|---|---|---|
| AISI 201L | — | — |
| UNS S20103 | — | Unified Numbering System |
| ASTM A240 Type 201L | ASTM A240 | When dual certified |
| Related low-carbon 201 | JIS / GB | National equivalents |
Customers frequently compare AISI 201L with astm a240 type 304l stainless steel sheet plate, astm a240 type 201 stainless steel sheet plate, astm a240 type 301 stainless steel sheet plate, and astm a240 type 316l stainless steel sheet plate.
Applications
AISI 201L is used in cost-sensitive welded applications that require better intergranular corrosion resistance than standard 201. Typical applications include:
| Industry / Sector | Typical Components / Equipment |
|---|---|
| Kitchen & Food Equipment | Welded sinks, tabletops, food processing equipment |
| Architecture & Construction | Decorative panels, elevator interiors, cladding |
| Transportation | Bus and railway interior components |
| Household Appliances | Structural and formed parts |
| General Fabrication | Tanks, containers, welded frames and enclosures |
| Light Industrial Equipment | Non-critical process equipment and housings |
For industry-specific solutions, please also review our construction industry and equipment manufacturing pages. Supporting fabrication services such as steel cutting services and steel welding services are available.
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 201L with clear advantages:
- Genuine China Mill Agent / mill-direct pricing
- Consistent quality and complete heat traceability
- Full Mill Test Certificates (EN 10204 3.1)
- Flexible thickness, width and surface finish options (including AISI 201L 2B and AISI 201L BA)
- Technical support for material selection between 201, 201L, 304L and 316L
- Value-added services including steel cutting services, stainless surface finishing services and worldwide shipping service
FAQ
- What is the main difference between AISI 201 and AISI 201L?AISI 201L has a much lower carbon content (≤ 0.03%), which greatly improves resistance to intergranular corrosion after welding. SHH STEEL recommends 201L whenever welding is involved.
- Can AISI 201L replace 304L?n many mildly corrosive, cost-sensitive applications, yes. However, 304L still offers better overall corrosion resistance. SHH STEEL can help assess suitability based on the specific environment.
- Is AISI 201L magnetic?Non-magnetic in the annealed condition. It may become slightly magnetic after heavy cold working.
- What surface finishes does SHH STEEL supply for AISI 201L?The most common finishes are 2B and BA. No.1, No.4, HL and polished finishes are also available
- Does SHH STEEL provide dual certification?Yes, dual certification to ASTM A240 / related standards is available upon request.
Conclusion
AISI 201L Stainless Steel Plate is the low-carbon, more weldable version of the economical 201 austenitic stainless steel. It offers higher strength than 304L, improved resistance to intergranular corrosion after welding, good formability and a clear cost advantage. It is an excellent choice for kitchen equipment, architectural components, transportation interiors and general welded fabrication where the full corrosion performance of 304L is not required.
As a professional China Mill Agent, SHH STEEL supplies high-quality AISI 201L 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 201L 2B and AISI 201L BA), processing services or a competitive quotation.
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