316 Stainless Steel Pipe is an austenitic stainless steel grade containing 2–3% molybdenum, which significantly enhances resistance to chloride corrosion, pitting, and crevice corrosion. This makes 316 one of the most widely used stainless steels in marine, chemical, pharmaceutical, and high‑corrosion environments.
316 stainless steel pipe is available in seamless and welded forms, with multiple surface finishes and tight dimensional tolerances.
Key Advantages:
Superior corrosion resistance compared to 304
Excellent resistance to chlorides, seawater, and chemicals
High strength and durability
Excellent weldability and formability
Suitable for sanitary and high‑purity applications
🟧 Standards
ASTM A312 / A312M
ASTM A213
EN 10216‑5
JIS G3463
GB/T 14976
🟧 Grade
316 (UNS S31600)
🟧 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 TP316)
Element
Content (%)
C
≤ 0.08
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
≥ 515 MPa
Yield Strength
≥ 205 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 316 Stainless Steel Pipe
Superior corrosion resistance due to molybdenum
Excellent performance in chloride and seawater environments
High strength and durability for demanding applications
Suitable for sanitary, chemical, and high‑purity systems
Widely used in marine and chemical industries worldwide
🟧 Why Choose WelSteels
Reliable supply of 316 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
