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
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.
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
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:
Dengwei International Trade is mainly engaged in various high-end steel import and export businesses, and is a brand enterprise in the metal circulation industry.