316L Stainless Steel Pipe is the low‑carbon version of 316 stainless steel, containing 2–3% molybdenum and a maximum carbon content of 0.03%. This combination provides exceptional resistance to chloride corrosion, pitting, and crevice corrosion, while also offering superior weldability compared to standard 316.
316L is widely used in marine engineering, chemical processing, desalination plants, pharmaceutical systems, and high‑purity applications where corrosion resistance and weld integrity are critical.
Key Advantages:
Low carbon content prevents carbide precipitation during welding
Outstanding resistance to chlorides, seawater, and aggressive chemicals
Excellent weldability and formability
Suitable for sanitary and high‑purity applications
Superior corrosion resistance compared to 304/304L
🟧 Standards
ASTM A312 / A312M
ASTM A213
EN 10216‑5
JIS G3463
GB/T 14976
🟧 Grade
316L (UNS S31603)
🟧 Product Specifications & Available Sizes
Outer Diameter (OD)
Seamless: 6–530 mm
Welded: 12–630 mm
Wall Thickness (WT)
0.5–30 mm
Length
6 m / 12 m / custom
Type
Seamless (Cold Drawn / Hot Rolled)
Welded (ERW / TIG / Laser Welded)
Surface Finish Options
2B
BA
180 / 240 / 320 / 400 / 600 Grit Polish
8K Mirror
Pickled
🟧 Chemical Composition (ASTM A312 TP316L)
Element
Content (%)
C
≤ 0.03
Si
≤ 1.00
Mn
≤ 2.00
P
≤ 0.045
S
≤ 0.030
Cr
16.0–18.0
Ni
10.0–14.0
Mo
2.0–3.0
N
≤ 0.10
🟧 Mechanical Properties
Property
Requirement
Tensile Strength
≥ 485 MPa
Yield Strength
≥ 170 MPa
Elongation
≥ 40%
Hardness
≤ 217 HB
🟧 Physical Properties
Property
Value
Density
7.98 g/cm³
Melting Point
1375–1400°C
Thermal Conductivity
16.3 W/m·K
Electrical Resistivity
0.74 μΩ·m
🟧 Manufacturing Processes
Hot Rolling
Cold Drawing
TIG Welding
Laser Welding
Annealing
Pickling
Polishing
Eddy Current Testing
Hydrostatic Testing
🟧 Primary Industry Usage
Marine engineering & seawater pipelines
Chemical and petrochemical processing
Desalination plants
Pharmaceutical and sanitary systems
Heat exchangers and condensers
Food processing equipment
High‑corrosion industrial environments
🟧 Why Use 316L Stainless Steel Pipe
Best weldability among molybdenum‑alloyed stainless steels
Low carbon content prevents intergranular corrosion after welding
Superior chloride and seawater resistance
Ideal for high‑purity, sanitary, and chemical applications
Global standard for marine and chemical industries
🟧 Why Choose WelSteels
Reliable supply of 316L seamless & welded pipes
Full MTC 3.1 and third‑party inspection available
Advanced polishing, welding, and annealing capabilities
Global shipping with professional loading supervision
Competitive pricing for bulk and project orders
Technical support for corrosion selection & engineering design
