Polished 316 Stainless Steel Tubing in Stock
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If you are looking for high-quality polished 316 stainless steel tubing in stock, Gnee offers a wide selection of bright, smooth-surface stainless steel tubes suitable for decorative, hygienic, and industrial applications.
Made from AISI 316 / EN 1.4401 austenitic stainless steel, these tubes feature superior corrosion resistance and excellent mechanical properties, especially in chloride-rich or marine environments. The polished surface enhances not only the appearance but also the cleanability and hygiene performance, making them ideal for food, beverage, and pharmaceutical systems.
polished 316 stainless steel tubing specifications
| Item | Description |
|---|---|
| Material Grade | AISI 316 / 316L / EN 1.4401 / 1.4404 |
| Standard | ASTM A269 / ASTM A270 / ASTM A312 |
| Outer Diameter (OD) | 6 mm – 168 mm |
| Wall Thickness | 0.5 mm – 5.0 mm |
| Length | 6000 mm or custom cut |
| Finish | 180#, 240#, 400#, BA, Mirror, Electropolished |
| Type | Seamless or Welded |
| Testing | PMI, Eddy Current, Hydrostatic, Visual & Surface Inspection |
Chemical Composition (AISI 316 / EN 1.4401)
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Nickel (Ni) | 10.0 – 14.0 |
| Chromium (Cr) | 16.0 – 18.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Iron (Fe) | Balance |
316 stainless steel seamless tubing Mechanical Properties
| Property | Typical Value |
|---|---|
| Density | 7.98 g/cm³ |
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2%) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness (HRB) | ≤ 90 |
| Melting Range | 1375 – 1400°C |
Surface Finish Options for Polished Tubing
| Finish Type | Roughness (Ra) | Description | Typical Use |
|---|---|---|---|
| 180 Grit (Satin Polish) | 0.4 – 0.6 μm | Smooth, matte appearance | Architectural & furniture |
| 240 Grit | 0.2 – 0.4 μm | Finer polish, reflective | Automotive, decorative use |
| #400 / Mirror Finish (BA / 2BA) | ≤ 0.1 μm | Highly reflective, mirror-like | Food, beverage, and medical piping |
| Electropolished (EP) | ≤ 0.05 μm | Ultra-clean, sterile surface | Pharmaceutical & semiconductor systems |
Gnee maintains a large stock of polished tubes with various finish grades to meet both aesthetic and functional requirements.Email: info@gneestainless.com
316 stainless steel tubing surface treatment
What is the typical price per kg of polished 316 tubing?
Prices typically range between US$3.2 – US$4.5 per kg, depending on wall thickness, polish grade, and tube type (seamless or welded).
Why Buy from Gnee
Gnee supplies high-precision polished 316 stainless steel tubing with:
Advanced polishing and annealing equipment
Strict tolerance control (±0.05 mm)
Comprehensive quality documentation (Mill Test Certificates, EN 10204 3.1)
Whether you need mirror-polished sanitary tubing or decorative stainless pipes, Gnee provides customized sizes, surface finishes, and fabrication options.
Packaging & Quality Control
Packaging: PVC protective film, moisture-proof paper, and wooden box/pallet
Inspection: 100% PMI and surface inspection before shipment
Delivery Time: 7–15 days (stock items), 20–30 days (custom orders)
Certifications: ISO 9001, SGS, BV, CE approved
FAQs
Q1: What is the difference between polished and unpolished 316 tubing?
A: Polished tubes have a smoother, cleaner, and more reflective surface, improving both appearance and hygiene. Unpolished tubes are rougher and typically used for structural or hidden piping.
Q2: Can 316 polished tubing be used outdoors or in marine environments?
A: Yes. The addition of molybdenum makes 316 stainless steel highly resistant to saltwater corrosion, making it ideal for coastal or marine use.
Q3: What's the difference between 316 and 316L polished tubing?
A: 316L has lower carbon content, improving weldability and corrosion resistance in welded zones - preferred for sanitary or chemical piping.
Q4: What polishing levels are available?
A: Gnee provides 180#, 240#, 400#, BA (Bright Annealed), and Electropolished (EP) finishes, depending on required smoothness and reflectivity.
