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316L Stainless Steel – Supplier’s Guide to Composition, Properties, and Global Supply

Views: 0     Author: Rachel Wynn     Publish Time: 2025-05-27      Origin: Site

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As a global supplier of stainless steel materials, we often receive inquiries about 316L stainless steel—especially for applications requiring corrosion resistance, low carbon content, and weldability.Whether you're working on a marine system, chemical plant, heat exchanger, or pressure vessel, understanding the full characteristics of 316L is essential before sourcing. In this guide, we explain not only the composition and mechanical properties, but also provide practical sourcing insights, including available forms, typical grades, and export options.

What Is 316L Stainless Steel?

316L stainless steel is an improved version of 316 stainless steel, specifically designed to enhance corrosion resistance and facilitate welding. The "L" stands for "Low Carbon," meaning it contains a maximum of 0.03% carbon, significantly reducing the risk of sensitization during welding or high-temperature exposure. This makes it particularly suitable for heavy gauge welded components.

Chemical Composition of 316L Stainless Steel

The following table shows the typical chemical composition of 316L stainless steel:

Element Percentage (%)
Chromium (Cr) 16.0 – 18.0
Nickel (Ni) 10.0 – 14.0
Molybdenum (Mo) 2.0 – 3.0
Carbon (C) ≤ 0.03
Manganese (Mn) ≤ 2.0
Silicon (Si) ≤ 1.0
Phosphorus (P) ≤ 0.045
Sulfur (S) ≤ 0.03
Iron (Fe) Balance


316 vs 316L Stainless Steel: Application in Rapid Prototyping | RapidDirect

Mechanical and Physical Properties

316L stainless steel offers a robust combination of strength and ductility, making it ideal for demanding applications.

Property Value
Density 8.00 g/cm³
Tensile Strength ~485 MPa (70 ksi)
Yield Strength ~170 MPa (25 ksi)
Elongation ~40%
Hardness (Brinell) ≤ 217 HB
Melting Point 1370–1400°C
Modulus of Elasticity 193 GPa
Magnetic Permeability Non-magnetic in annealed state

Applications of 316L Stainless Steel

Because of its resistance to corrosion, heat, and chemical attack, 316L stainless steel is used across a wide range of industries:

  • Medical and Surgical Instruments: Orthopedic implants, surgical tools, and operating tables.

  • Pharmaceutical Equipment: Bioreactors, mixing tanks, piping systems.

  • Food and Beverage Processing: Storage tanks, heat exchangers, conveyors.

  • Marine Industry: Boat fittings, underwater fasteners, and propeller shafts.

  • Chemical Processing: Valves, pumps, tanks, and pipework in corrosive chemical environments.

  • Architecture: Facades, handrails, and cladding in coastal structures.

Advantages of 316L Stainless Steel

  • Excellent corrosion resistance in chloride-rich environments

  • Low carbon content minimizes risk of intergranular corrosion

  • Superior weldability and ease of fabrication

  • Excellent high-temperature strength and oxidation resistance

  • Long service life and low maintenance

Do you know what's the difference between SS 316,316L,316H,316Ti?|WORLDIRONSTEEL

316 vs 316L Stainless Steel: Key Differences

The major difference between 316 and 316L stainless steel lies in their carbon content and weldability. Here's a detailed comparison:

Feature 316 316L
Carbon Content ≤ 0.08% ≤ 0.03%
Weldability Good Excellent
Resistance to Sensitization Moderate High
Corrosion Resistance Very Good Excellent
Cost Slightly lower Slightly higher

FAQ

Q: Is 316L stainless steel magnetic?

No, 316L stainless steel is non-magnetic in its annealed state. However, it may exhibit slight magnetism after cold working or forming.

Q: Can 316L stainless steel be used in marine environments?

Yes. 316L is highly resistant to pitting and crevice corrosion in saltwater and is widely used in marine applications for both above and below water components.

Q: Is 316L stainless steel safe for medical implants?

Yes. Due to its excellent biocompatibility, corrosion resistance, and non-reactivity, 316L is commonly used in surgical implants, orthopedic devices, and dental instruments.

Q: How does 316L compare to 304 stainless steel?

316L contains molybdenum, which enhances its corrosion resistance, especially against chlorides. It is more suitable for harsher environments than 304, though it is typically more expensive.

Contact Us for Datasheets, Samples, or Pricing

If you need 316L stainless steel for your project, our team can assist with:

  • Material selection and technical support

  • International delivery (FOB/CFR/DDP)

  • MTC 3.1 / 3.2, SGS / BV inspection

Get a Free Quote → |  dengweisteel666@gmail.com

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