316 316L Stainless Steel Seamless Pipe Austenitic Nickel Chromium Molybdenum Alloy Steel
Price:
Negotiable (Request a Quote)
MOQ:
100kg
Delivery Time:
15-25days
Brand:
Baosteel，TISCO
Product Description
316/316L Seamless Pipe - ASTM A312 TP316L Marine-grade Stainless Steel Pipe
316/316L stainless steel seamless pipe is an austenitic chromium-nickel-molybdenum alloy pipe known for its superior corrosion resistance, especially against chlorides and acidic environments.
316L is the low-carbon version of 316, offering better weldability and resistance to intergranular corrosion after welding. Both grades are widely used in marine, chemical, and pharmaceutical applications.
Key Advantage: Excellent resistance to pitting and crevice corrosion in chloride environments.
Specifications
| Parameter | Available Options |
|---|---|
| Material Grade | 316, 316L (1.4401, 1.4404) |
| Standard | ASTM A312 / ASME SA312 / EN 10216-5 / JIS G3459 |
| Outer Diameter (OD) | 6.0mm - 610mm (1/8" - 24") |
| Wall Thickness (WT) | 0.5mm - 40mm (Schedule 5S - XXS) |
| Length | 6m / 12m / custom cut-to-length |
| Surface Finish | Annealed & Pickled / Bright Annealed / Polished |
| End Finish | Plain ends / Beveled ends / Threaded |
| Packing | Wooden crates / Bundles / Plastic caps on both ends |
Schedule Chart (Standard Sizes)
| NPS (inch) | OD (mm) | Schedule 10S | Schedule 40S | Schedule 80S |
|---|---|---|---|---|
| 1/2" | 21.3 | 2.11mm | 2.77mm | 3.73mm |
| 1" | 33.4 | 2.77mm | 3.38mm | 4.55mm |
| 2" | 60.3 | 2.77mm | 3.91mm | 5.54mm |
| 4" | 114.3 | 3.05mm | 6.02mm | 8.56mm |
| 6" | 168.3 | 3.40mm | 7.11mm | 10.97mm |
| 8" | 219.1 | 3.76mm | 8.18mm | 12.70mm |
Other sizes and custom schedules available upon request.
Mechanical Properties (Typical)
| Property | 316 | 316L |
|---|---|---|
| Tensile Strength | ≥ 515 MPa | ≥ 485 MPa |
| Yield Strength (0.2%) | ≥ 205 MPa | ≥ 170 MPa |
| Elongation | ≥ 35% | ≥ 35% |
| Hardness (Brinell) | ≤ 217 HB | ≤ 217 HB |
| Hardness (Rockwell B) | ≤ 95 HRB | ≤ 95 HRB |
Chemical Composition (%)
| Element | 316 | 316L |
|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.030 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 0.75 | ≤ 0.75 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 |
| Chromium (Cr) | 16.0 - 18.0 | 16.0 - 18.0 |
| Nickel (Ni) | 10.0 - 14.0 | 10.0 - 14.0 |
| Molybdenum (Mo) | 2.00 - 3.00 | 2.00 - 3.00 |
Key Features & Benefits
Molybdenum addition (2-3%)
Superior resistance to pitting and crevice corrosion
Superior resistance to pitting and crevice corrosion
Low carbon (316L)
Excellent weldability, no post-weld annealing required
Excellent weldability, no post-weld annealing required
Seamless construction
No weld seam, uniform structure, higher pressure rating
No weld seam, uniform structure, higher pressure rating
Austenitic structure
Good toughness even at cryogenic temperatures
Good toughness even at cryogenic temperatures
Wide size range
6mm to 610mm OD, suitable for various applications
6mm to 610mm OD, suitable for various applications
Applications
| Industry | Application | Why 316/316L |
|---|---|---|
| Marine / Offshore | Seawater piping, shipbuilding, and oil rigs | Excellent chloride corrosion resistance |
| Chemical Processing | Chemical reactors, heat exchangers, storage tanks | Resists acids (acetic, citric, formic) |
| Oil & Gas | Downhole tubing, flow lines, refineries | High pressure & corrosion resistance |
| Pharmaceutical | Clean steam lines, process piping | Smooth interior, easy to clean |
| Food & Beverage | Processing equipment, beer brewing lines | Non-reactive, sanitary surface |
| Pulp & Paper | Bleaching systems, digesters | Resists sulfite and sulfate liquors |
| Water Treatment | Desalination plants, RO systems | Seawater and brine resistance |
| Power Generation | Condenser tubes, cooling water systems | Resists cooling water corrosion |
Quality Assurance
| Certification | Description |
|---|---|
| Mill Test Certificate | EN 10204 3.1 - traceable to heat number |
| Third-party Inspection | SGS, BV, or as requested |
| Hydrostatic Test | 100% tested per ASTM A312 |
| Eddy Current Test | Optional per ASTM A213 |
| PMI Test | Positive Material Identification - available |
| Intergranular Corrosion Test | Per ASTM A262 - available |
316 vs 316L - When to Choose Which?
| Criteria | Choose 316 | Choose 316L |
|---|---|---|
| General corrosion service | ✓ | ✓ |
| Welding involved | - | ✓ (preferred) |
| Thick-wall welding | - | ✓ (avoid sensitization) |
| High temperature service (>450°C) | ✓ | - |
| Maximum strength requirement | ✓ (higher yield) | - |
| Standard pressure piping | ✓ | ✓ |
Quick Rule: For welded applications, choose 316L. For high-temperature service, choose 316.
Frequently Asked Questions (FAQ)
Q: What is the difference between 316 and 316L?
A: 316L has lower carbon content (≤0.03% vs ≤0.08%), which prevents carbide precipitation during welding and eliminates the need for post-weld annealing.
A: 316L has lower carbon content (≤0.03% vs ≤0.08%), which prevents carbide precipitation during welding and eliminates the need for post-weld annealing.
Q: Can 316L pipe be used in high-temperature applications?
A: For continuous service above 450°C, standard 316 is preferred as 316L may have lower creep strength at elevated temperatures.
A: For continuous service above 450°C, standard 316 is preferred as 316L may have lower creep strength at elevated temperatures.
Q: Is 316 seamless pipe suitable for saltwater?
A: Yes. 316/316L offers excellent resistance to seawater and brackish water, though for stagnant seawater conditions, super duplex (2507) may be recommended.
A: Yes. 316/316L offers excellent resistance to seawater and brackish water, though for stagnant seawater conditions, super duplex (2507) may be recommended.
Q: What standards apply to 316L seamless pipe?
A: Most common: ASTM A312 (general service), ASTM A213 (boiler/heat exchanger), ASTM A269 (precision tubing).
A: Most common: ASTM A312 (general service), ASTM A213 (boiler/heat exchanger), ASTM A269 (precision tubing).
Q: Do you provide custom sizes?
A: Yes. We offer custom OD, WT, and length. Minimum order quantity for custom sizes - please inquire.
A: Yes. We offer custom OD, WT, and length. Minimum order quantity for custom sizes - please inquire.
Why Choose Our 316/316L Seamless Pipe?
- Factory direct - Competitive pricing
- Full traceability - Heat number on every pipe
- Short lead time - Stock available for standard sizes
- Global export - 20+ countries served
- Flexible MOQ - Small trial orders welcome
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Free samples available for qualified inquiries. A mill test certificate is provided with every shipment.
Free samples available for qualified inquiries. A mill test certificate is provided with every shipment.
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Company
Shanxi Zhongcheng Metal Co., Ltd.
Location
Room 2, No. 221 Tianzhang Avenue, Fengdong New City, Xi'an, Shaanxi Province
Contact Person
Zhongcheng Metal