AISI 316LN Stainless Steel Plate | 316LN China steel mill-Direct Supply
What is AISI 316LN Stainless Steel?
As a professional China steel mill-Direct Supply and stainless steel plate supplier, SHH STEEL is pleased to present AISI 316LN Stainless Steel Plate.
AISI 316LN (UNS S31653) is an optimized variant of the molybdenum-bearing austenitic stainless steel 316 family. It combines two important improvements: extra-low carbon content (maximum 0.03%) and intentional nitrogen addition (typically 0.10–0.16%). The low carbon provides excellent resistance to intergranular corrosion after welding, while nitrogen significantly increases yield and tensile strength compared with standard 316L. Molybdenum (2–3%) retains the superior pitting and crevice corrosion resistance of the 316 series.
This dual enhancement makes AISI 316LN particularly suitable for welded constructions that also require higher mechanical strength in chloride-containing or chemical environments. The grade remains fully austenitic, non-magnetic in the annealed condition, and offers good formability and toughness.
SHH STEEL supplies AISI 316LN as true China steel mill-Direct Supply, sourcing directly from major Chinese stainless steel mills. This model delivers competitive mill pricing, consistent quality, complete heat traceability and reliable delivery. SHH STEEL offers AISI 316LN in plate and sheet form across a practical range of thicknesses and surface finishes.
AISI 316LN is frequently compared with a240 316, a240 316l, a240 316n, a240 316ti, a240 317l and a240 2205 when selecting higher-strength or molybdenum-bearing grades. SHH STEEL provides technical support to help customers choose the most appropriate material.
Material Specification
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Grade | AISI 316LN / UNS S31653 | Confirmed |
| Related Standards | ASTM A240, ASME SA240, EN, JIS related | Available |
| Product Form | Plate, Sheet | Available |
| Delivery Condition | Solution Annealed | Standard |
| Thickness Range | 0.5 mm – 80 mm (thicker available on request) | Custom sizes supported |
| Width | Up to 2000–3000 mm | Available |
| Length | Up to 12000 mm or cut-to-length | Available |
| Surface Finish | 2B, No.1, BA, No.4 | Available |
| Certification | EN 10204 3.1 / Mill Test Certificate | Available |
SHH STEEL can supply AISI 316LN dual-certified to ASTM A240 / ASME SA240 when required by the project.
Chemical Composition
Typical Chemical Composition of AISI 316LN (UNS S31653):
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 16.00 – 18.00 |
| Nickel (Ni) | 10.00 – 14.00 |
| Molybdenum (Mo) | 2.00 – 3.00 |
| Nitrogen (N) | 0.10 – 0.16 |
| Iron (Fe) | Balance |
The combination of extra-low carbon (≤ 0.03%) and elevated nitrogen (0.10–0.16%) is the defining feature of AISI 316LN. Low carbon ensures excellent resistance to intergranular corrosion after welding, while nitrogen provides solid-solution strengthening that raises both yield and tensile strength. Molybdenum maintains superior pitting resistance. SHH STEEL carefully controls both carbon and nitrogen to deliver consistent performance.
Mechanical Properties
Annealed Condition (typical values)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 550 MPa |
| Yield Strength (0.2%) | ≥ 240 MPa |
| Elongation (in 50 mm) | ≥ 35–40% |
| Hardness | ≤ 217 HB |
AISI 316LN offers higher strength than standard a240 316l while retaining the excellent ductility and toughness expected from the 316 family. The higher strength can allow thickness reduction in many designs. SHH STEEL supplies material with consistent nitrogen-enhanced mechanical properties.
Physical Properties Density is approximately 8.00 g/cm³. The grade is non-magnetic in the annealed condition. Melting range is approximately 1370–1400°C.
Material Comparison
| Grade | Carbon | Nitrogen | Mo (%) | Strength Level | Weldability & IGC | Typical Preference |
|---|---|---|---|---|---|---|
| AISI 316 | ≤ 0.08 | Low | 2.0–3.0 | Standard | Good | General chloride service |
| AISI 316L | ≤ 0.03 | Low | 2.0–3.0 | Lower | Excellent | Welded chloride service |
| AISI 316N | ≤ 0.08 | Elevated | 2.0–3.0 | Higher | Good | Higher strength chloride service |
| AISI 316LN | ≤ 0.03 | Elevated | 2.0–3.0 | Higher | Excellent | Welded high-strength chloride service |
| AISI 316Ti | ≤ 0.08 | Low | 2.0–3.0 | Standard | Good (stabilized) | High-temp welded chloride service |
| AISI 317L | ≤ 0.03 | Low | 3.0–4.0 | Standard | Excellent | More severe chloride environments |
AISI 316LN is the preferred choice when both higher strength and excellent as-welded resistance to intergranular corrosion are required in chloride environments. Compared with a240 316n, the low carbon content provides superior performance after welding. For significantly higher strength and chloride resistance, SHH STEEL recommends evaluating a240 2205.
Corrosion Resistance
AISI 316LN offers corrosion resistance essentially equivalent to standard AISI 316 and 316L in most environments. The molybdenum addition provides superior resistance to pitting and crevice corrosion in chloride-containing media, while the low carbon content ensures excellent resistance to intergranular corrosion after welding. Nitrogen has a neutral to slightly beneficial effect on pitting resistance.
It performs well in chemical processing, marine atmospheres, pharmaceutical and food applications. In highly concentrated chlorides or at elevated temperatures, pitting or stress corrosion cracking can still occur. For more severe chloride service, SHH STEEL recommends a240 317l or a240 2205.
Weldability
AISI 316LN has excellent weldability. The extra-low carbon content minimizes the risk of intergranular corrosion in the as-welded condition, while the nitrogen contributes to higher strength in both the base metal and the weld zone when proper filler metals are used.
Matching or 316L-type filler metals are commonly employed. Post-weld annealing is generally not required. This combination of higher strength and outstanding as-welded performance is the main reason SHH STEEL recommends AISI 316LN for demanding welded constructions in chloride service.
Heat Treatment
AISI 316LN is normally supplied in the solution-annealed condition by SHH STEEL.
Recommended solution annealing temperature range is 1010–1120°C, followed by rapid cooling. Proper solution annealing is important to retain nitrogen in solid solution and to optimize both strength and corrosion resistance. SHH STEEL controls heat treatment to ensure consistent performance.
Surface Finishes
| Finish | Description | Typical Use / Keywords |
|---|---|---|
| 2B | Cold-rolled, annealed, pickled, skin-passed | AISI 316LN 2B – most common for general fabrication |
| No.1 | Hot-rolled, annealed and pickled | AISI 316LN No.1 – industrial plate |
| BA | Bright Annealed | AISI 316LN BA – cleaner surface applications |
| No.4 | Brushed finish | AISI 316LN No.4 – architectural surfaces |
SHH STEEL regularly supplies AISI 316LN in 2B and No.1 finishes, and can provide other finishes according to project requirements.
Tolerances
Dimensional tolerances for AISI 316LN Stainless Steel Plate supplied by SHH STEEL generally conform to ASTM A480 practices.
Typical available size range is thickness 0.5 mm – 80 mm, width up to 2000–3000 mm, and length up to 12000 mm or cut-to-length. SHH STEEL provides precise dimensional control and can support tighter tolerances when required.
Equivalent Material Grades
| Grade / Designation | Standard / Region | Notes |
|---|---|---|
| AISI 316LN | — | — |
| UNS S31653 | Unified Numbering System | — |
| ASTM A240 Type 316LN | ASTM A240 | When dual certified |
| 1.4429 / related | EN (Europe) | Closest European grades |
| SUS316LN related | JIS (Japan) | Japanese related grades |
| 022Cr17Ni12Mo2N related | GB/T (China) | Chinese related grades |
| Related 316L / 316N / 316Ti | Multiple | Low-carbon / N-strengthened / stabilized variants |
Related grades for comparison include a240 316, a240 316l, a240 316n, a240 316ti, a240 317l and a240 2205.
Applications
AISI 316LN is selected for welded constructions that also require higher strength than standard 316L in chloride environments. Typical applications of AISI 316LN include:
| Industry / Sector | Typical Components / Equipment (with keywords) |
|---|---|
| Pressure Vessels & Tanks | AISI 316LN storage tanks, pressure vessels and process containers |
| Chemical & Process Industry | AISI 316LN welded reactors, piping and process equipment |
| Marine & Offshore | AISI 316LN high-strength components in chloride environments |
| Pharmaceutical & Food | AISI 316LN clean equipment and storage systems |
| Structural Fabrication | AISI 316LN high-strength welded frames and structural parts |
| General Engineering | AISI 316LN high-strength welded fabrications |
SHH STEEL supplies AISI 316LN for these demanding applications with consistent quality. For related industry solutions, see our petrochemical industry, marine industry, construction industry and equipment manufacturing pages. Supporting services include steel cutting services and steel welding services.
Why Choose SHH STEEL
SHH STEEL is a China steel mill-Direct Supply specializing in stainless steel plate and sheet. By working directly with major Chinese stainless steel mills, SHH STEEL supplies AISI 316LN with the following advantages:
- Genuine China steel mill-Direct Supply pricing
- Consistent quality and complete heat traceability
- Full Mill Test Certificates (EN 10204 3.1)
- Low-carbon nitrogen-strengthened material optimized for welded high-strength chloride service
- Flexible dimensions and surface finishes (including AISI 316LN 2B and AISI 316LN No.1)
- Technical support for selection among 316, 316L, 316N, 316LN, 316Ti and duplex grades
- Value-added services including steel cutting services, steel welding services and worldwide shipping service
For more information about our company and full product range, please visit China steel Mill Agent-SHH STEEL.
FAQ
- What is the difference between AISI 316LN and AISI 316L?AISI 316LN contains intentional nitrogen (0.10–0.16%), which significantly increases yield and tensile strength compared with standard 316L, while retaining the same excellent weldability and intergranular corrosion resistance. SHH STEEL recommends 316LN when higher strength is required in welded chloride service. Q: What is the difference between AIS
- What is the difference between AISI 316LN and AISI 316N?AISI 316LN has extra-low carbon (≤ 0.03%) in addition to elevated nitrogen, giving it better resistance to intergranular corrosion after welding. SHH STEEL recommends 316LN when extensive welding is involved. Q: Can AISI 316LN be used i
- Can AISI 316LN be used instead of duplex stainless steel?In some moderate-strength applications yes, but duplex grades such as 2205 offer significantly higher strength and better chloride resistance. SHH STEEL can help evaluate whether 316LN or a duplex grade is more suitable for your project.
- Is AISI 316LN magnetic?Non-magnetic in the annealed condition. It may become slightly magnetic after heavy cold working. SHH STEEL supplies fully annealed material as standard.
- What is the density of AISI 316LN?Approximately 8.00 g/cm³. SHH STEEL provides material certificates confirming physical and mechanical properties.
- Does nitrogen affect the corrosion resistance of 316LN?Nitrogen has a neutral to slightly beneficial effect on pitting resistance. The main corrosion advantages of 316LN still come from molybdenum and the low carbon content. SHH STEEL controls nitrogen carefully to balance strength and corrosion performance.
- Does SHH STEEL supply dual-certified ASTM A240 / AISI 316LN material?Yes, SHH STEEL commonly supplies dual-certified material upon request.
Conclusion
AISI 316LN Stainless Steel Plate is a low-carbon, nitrogen-strengthened molybdenum-bearing austenitic grade that successfully combines higher strength with excellent weldability and superior resistance to intergranular corrosion and pitting. It is an outstanding choice for pressure vessels, process equipment, marine components and other welded applications where elevated mechanical properties and chloride resistance are both required.
As a professional China steel mill-Direct Supply, SHH STEEL provides high-quality AISI 316LN Stainless Steel Plate with competitive pricing, full certification and complete technical support.
Contact SHH STEEL today for stock availability, surface finish options (including AISI 316LN 2B and AISI 316LN No.1), or a competitive quotation.
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