Seamless Stainless Steel TP317L Tube
Distinguished by its increased Molybdenum (3% min) and low-carbon content, our TP317L tubing offers significantly enhanced resistance to pitting and crevice corrosion compared to standard 316L grades, especially in acidic chloride environments. These tubes are indispensable for mission-critical applications in flue gas desulfurization (FGD), chemical reactors, and pulp and paper processing. Through advanced cold-drawing and precise solution annealing, GZH ensures every tube maintains a uniform microstructure and excellent weldability for the most aggressive industrial media.
PREN ≈ 28-30 ,higher than TP316L PREN 24-25
What Is a Seamless Stainless Steel TP317L Tube?
Seamless Stainless Steel TP317L Tube is a high-performance, corrosion-resistant tube crafted from a single, solid billet of a high-molybdenum, low-carbon austenitic stainless steel. Unlike welded tubes, it has no weld joint, ensuring superior structural integrity and reliability, especially under high-stress and highly corrosive conditions. The"317L"designation refers to a specific grade that is an improved, low-carbon version of Stainless Steel TP317L . The"L"stands for low carbon, which minimizes carbide precipitation during welding. This low-carbon content ensures the material retains its full corrosion resistance in the heat-affected zone, making it a top choice for applications where welding is required in highly aggressive corrosive environments.
Key Features and Advantages
Seamless TP317L Stainless Steel Tube offer a unique combination of benefits that make them invaluable in the most demanding industries:
Superior Corrosion Resistance: The higher molybdenum content provides exceptional resistance to pitting, crevice corrosion, and general corrosion, particularly in chloride-containing environments and against sulfuric acid.
Excellent Weldability: The low carbon content makes it highly resistant to intergranular corrosion in the heat-affected zone after welding, eliminating the need for post-weld heat treatment.
High Pressure and Temperature Tolerance: The seamless construction and robust material allow the tube to safely handle high internal pressures and moderate temperatures.
Good Formability: The alloy's high ductility allows for easy forming and fabrication into complex shapes.
Cost-Effectiveness: It provides a good balance of performance and cost, offering a high-performance alternative to more expensive nickel alloys for certain applications.
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Stainless Steel TP317L .
Table 1: Chemical Composition of Stainless Steel TP317L
The composition of Stainless Steel TP317L is carefully balanced to achieve its superior corrosion resistance and high strength.
| Cr | Ni | P | S | Mo | Mn | Si | C |
| 18.00 - 20.00 | 11.00 - 15.00 | ≤ 0.045 | ≤ 0.030 | 3.00 - 4.00 | ≤ 2.00 | ≤ 1.00 | ≤ 0.03 |
Table 2: Typical Mechanical Properties of Stainless Steel TP317L
Stainless Steel TP317L is specifically designed to maintain its strength and shape in high-stress, corrosive environments.
| Property | Value (Annealed) |
| Tensile Strength | ≥ 485 MPa |
| Yield Strength | ≥ 170 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 217 HBW |
Table 3: Typical Physical Properties of Stainless Steel TP317L
These physical properties highlight the material's ability to perform reliably under a wide range of conditions.
| Property | Value |
| Density | 8.0 g/cm³ |
| Melting Point | 1398 - 1454 °C |
| Thermal Expansion | 16.6 µm/m·°C (20-100°C) |
| Thermal Conductivity | 16.3 W/m·K (20°C) |
| Modulus of Elasticity | 193 GPa |
| Electrical Resistivity | 0.74 x 10⁻⁶ Ω·m (20°C) |
Table 4: The Standard of Stainless Steel Seamless Tube Size Tolerance Size Chart :
| Standard | OD(D) | Tolerance（MM) | Thickness(S) | Tolerance(MM) | Length | Tolerance | |
| MM | Common | High | MM | MM | |||
| EN 10216-5 HFD | 30≤D≤219.1（D2) | ±1.0% or ±0.5mm, whicever is the greater(取较大者) | T1, T≤4 | ±15% or ±0.6mm, whicever is the greater(取较大者) | L≤6M | +5/0 | |
| T2 | ±12.5% or ±0.4mm, whicever is the greater(取较大者) | ||||||
| 219.1≤D≤610 (D1) | ±1.5% or ±0.75mm, whicever is the greater (取较大者) | T≤0.05D | +22.5%/-15% | 6 | +10/0 | ||
| T1, 0.05D | ±15% or ±0.6mm, whicever is the greater(取较大者) | ||||||
| T2, T>0.09D | ±12.5% or ±0.4mm, whicever is the greater(取较大者) | L>12 | +by agreement/0 | ||||
| EN 10216-5 CFD | D3(D≤219.1) | ±0.75% or ±0.3mm, whicever is the greater(取较大者) | T3 | ±10% or ±0.2mm, whicever is the greater(取较大者) | |||
| D4(D≤219.1) | ±0.5% or ±0.mm, whicever is the greater(取较大者) | T4 | ±7.5% or ±0.15mm, whicever is the greater(取较大者) | ||||
| ASTM A213 HFD | D≤100 | +0.4/-0.8 | D<100,S≤2.4 | +40%/0 | HFD, all size | +5.0/0 | |
| +0.4/-1.2 | D<100,2.4 | +35%/0 | |||||
| +0.4/-1.6 | D<100,3.8 | +33%/0 | |||||
| D<100,S>4.6 | +28%/0 | ||||||
| 100 | +0.4/-1.2 | D>100, 2.4 | +35%/0 | ||||
| 200 | +0.4/-1.6 | D>100,3.8 | +33%/0 | ||||
| D>100,S>4.6 | +28%/0 | ||||||
| ASTM A213 CFD | D<25 | ±0.10 | D≤38.1 | +20%/0 | CFD, D<50.8 | +3.0/0 | |
| 25≤D≤40 | ±0.15 | ||||||
| 40 | ±0.20 | ||||||
| 50≤D<65 | ±0.25 | ||||||
| 65≤D<75 | ±0.30 | D>38.1 | +22%/0 | CFD, D≥50.8 | +5.0/0 | ||
| 75≤D≤100 | ±0.38 | ||||||
| 100 | +0.38/-0.64 | ||||||
| 200 | +0.38/-1.14 | ||||||
| ASTM A269 | D≤13 | ±0.13 | D≤13 | ±15% | D<38 | +3.2/0 | |
| 13 | ±0.13 | 13 | ±10% | ||||
| 38≤D<89 | ±0.25 | D>38 | +4.8/0 | ||||
| 89≤D<140 | ±0.38 | ||||||
| 140≤D<203 | ±0.76 | ||||||
| 203≤D<305 | ±1.01 | ||||||
| 305≤D<356 | ±1.26 | ||||||
| ASTM A270 | D<25 | ±0.13 | For weld pipe all size | ±12.5% | +3.0/0 | ||
| 25-50 | ±0.20 | ||||||
| 50-75 | ±0.25 | ||||||
| 75-100 | ±0.38 | For CD SMLS pipe D≤38.1 | +20%/0 | ||||
| 100-140 | ±0.38 | +5.0/0 | |||||
| 140-200 | ±0.75 | For CD SMLS pipe D>38.1 | +22%/0 | ||||
| 200-300 | ±1.25 | ||||||
Common Applications of Seamless TP317L Tube
The combination of high corrosion resistance and good mechanical properties of A213 TP317L Seamless Stainless Steel Tube makes them a preferred choice for:
Chemical Processing: Used in reactors, heat exchangers, and piping for handling sulfuric acid, phosphoric acid, and other aggressive chemicals.
Pulp and Paper Industry: In equipment for bleaching and other processes where corrosive media are present and welding is required.
Marine Engineering: In seawater applications where resistance to saltwater corrosion is critical.
Food and Beverage: In equipment for processing highly acidic foods and beverages.
Manufacturing Process
The manufacturing of a Seamless Stainless Steel TP317L Tube is a precise, multi-step process:
- Heating: A solid billet of Stainless Steel TP317L is heated to a high temperature.
- Piercing: A piercing mill pushes a mandrel through the center of the heated billet to form a hollow shell.
- Drawing and Sizing: The hollow shell is then rolled and drawn to reduce its diameter and wall thickness to the desired dimensions.
- Heat Treatment: The tube is solution annealed to achieve its specified metallurgical properties and to ensure optimal performance.
- Finishing: The tube is cut to length, straightened, and subjected to rigorous testing to ensure it meets the highest standards for performance and reliability. This meticulous process ensures that every seamless Stainless Steel 317L tube is built to withstand the most demanding applications.
