316LN Stainless Steel (1.4406 / 1.4429)

316LN stainless steel is a nitrogen-enhanced, low-carbon alloy offering high strength, excellent corrosion resistance, and reliability under stress, ideal for high-performance engineering and industrial applications.

316LN Stainless Steel

316LN stainless steel (1.4406 / 1.4429) is a nitrogen-alloyed variant of 316L designed to offer superior strength and corrosion resistance in demanding environments. The nitrogen content, typically between 0.1% and 0.2%, enhances both yield and tensile strength while maintaining good ductility and formability. This makes 316LN an ideal material where structural integrity under stress is critical.

Known for its performance in high-temperature and corrosive conditions, stainless steel 316LN is widely used in the chemical, petrochemical, marine, oil and gas, and nuclear sectors. It is especially suited for use in pressure vessels, heat exchangers, piping systems, and structural components in aggressive environments.

Due to its low carbon content (≤ 0.03%), 316LN stainless steel also offers excellent resistance to intergranular corrosion after welding or thermal exposure making it suitable for fabrication-intensive projects involving 316LN flange connections or pressurised assemblies.

CUT TO LENGTH

Tell us the lengths you need and we will cut to length!

FORM

Special shapes that require forming or pressing? Yep - we do that too!

BEND

Need a specific bend or radius? No problem!

POLISH

From a satin finish, all the way up to super mirror. Let's make it sparkle!

AVAILABLE FORMS

Intamet offers 316LN in a wide range of forms, including the below:

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FAQs: 316LN Stainless Steel

What are the Mechanical Properties of 316LN Stainless Steel?

Thanks to its nitrogen addition, 316LN stainless steel properties include significantly improved mechanical performance over standard 316L:

Tensile Strength: 550–700 MPa

Yield Strength: ≥ 240 MPa

Elongation: ≥ 40%

Hardness: Rockwell B90

Modulus of Elasticity: 193 GPa

Impact Toughness: 27 J (20 ft-lb)

Density: 7.98 g/cm³

Melting Point: 1399–1454 °C (2550–2650 °F)

While stronger than 316L, this grade may show slightly reduced ductility, which can affect flexibility in some applications.

What are the Physical Properties of 316LN Stainless Steel?

Are There Variants of 316 Stainless Steel?

There are several 316 stainless steel variants, each suited to specific requirements:

316L: Low carbon, weld-friendly version for corrosion-sensitive environments

316H: High carbon for increased strength and hardness

316Ti: Stabilised with titanium for extended high-temperature use

316LN: Nitrogen-enhanced for superior strength and corrosion resistance

316F: Free-machining version with added sulfur

316L Mod: Modified for improved machinability

316L-Si: Silicon-enhanced for high-temperature oxidation resistance

316L-Mo / 316L-Cu: Customised for extreme corrosion resistance

316LN stands out as the preferred choice when strength, corrosion resistance, and weldability are required in a single material.

What is the Chemical Composition of 316LN Stainless Steel?

The chemical composition of 1.4406 stainless steel (also known as 316LN) typically includes:

Iron (Fe): Balance

Chromium (Cr): 16–18%

Nickel (Ni): 11–14%

Molybdenum (Mo): 2–3%

Nitrogen (N): 0.1–0.2%

Carbon (C): ≤ 0.03%

Manganese (Mn): ≤ 2%

Silicon (Si): ≤ 1%

Phosphorus (P): ≤ 0.045%

Sulfur (S): ≤ 0.03%

The combination of nitrogen and molybdenum improves pitting and crevice corrosion resistance, while the low carbon level ensures excellent weldability and protection against sensitisation.

Where is 316LN Stainless Steel Used?

316LN stainless steel is trusted in high-stress, high-temperature, and corrosive applications across industries such as:

Oil and gas: piping, tanks, pressure systems

Marine environments: offshore components and structures

Nuclear and power generation: containment vessels and piping

Chemical processing: valves, heat exchangers, and 316LN flanges

Pharmaceutical and biotech: sanitary process systems requiring structural integrity

Its enhanced strength and corrosion resistance make it particularly suitable for critical fabrication in the form of pipes, flanges, and other pressure-rated assemblies.

316LN Stainless Steel (1.4406 / 1.4429)