Seamless Stainless Steel TP316Ti Tube
Distinguished by the strategic addition of Titanium (Ti), our TP316Ti tubing prevents chromium carbide precipitation during prolonged exposure to the 425°C - 815°C range. This stabilization ensures superior resistance to intergranular corrosion (IGC) and pitting in chloride-rich environments, making them indispensable for mission-critical applications in heat exchangers, offshore marine hardware, and exhaust systems. Through advanced cold-drawing and precise solution annealing, GZH ensures every tube maintains a uniform microstructure and optimized creep strength for the most demanding industrial conditions.
“Our precision-controlled Titanium-to-Carbon ratio ensures that carbides are fully stabilized, preventing sensitization even after welding and high-temperature service.”
What is a Seamless Stainless Steel TP316Ti Tube?
Seamless Stainless Steel TP316Ti Tube (also called Seamless Stainless Steel 1.4571 Tube)is a cylindrical hollow profile crafted from a single, solid billet of stainless steel. Its seamless construction provides enhanced structural integrity and pressure ratings compared to products with a weld seam.
The"316Ti"designation signifies an austenitic stainless steel that is fundamentally a 316 grade stabilized with the addition of titanium. While 316L (low carbon) is an excellent choice for welding, it can still experience"sensitization"(carbide precipitation) if exposed to prolonged high temperatures. The titanium in 316Ti binds with the carbon, preventing it from forming chromium carbides at the grain boundaries. This stabilization ensures that the tube maintains its superior corrosion resistance even after being exposed to elevated temperatures.
Key Features and Advantages
TP316TI Seamless Stainless Steel Tube offer a unique combination of benefits that make them invaluable in specific industries:
Exceptional Resistance to Intergranular Corrosion: The addition of titanium prevents carbide precipitation during welding and high-temperature service. This is the primary advantage, ensuring the material retains its corrosion-fighting properties in the weld zone and throughout its service life.
Superior Corrosion Resistance: Like the standard 316 grade, it contains molybdenum, providing excellent resistance to pitting and crevice corrosion in chloride and acidic environments.
Enhanced High-Temperature Strength: The titanium stabilization not only prevents corrosion but also increases the material’s high-temperature strength and creep resistance, allowing it to perform reliably in a broad range of thermal conditions.
High Pressure Tolerance: The seamless construction provides a uniform, robust structure that safely handles high internal pressures.
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for 316Ti stainless steel.
Table 1: Chemical Composition of 316Ti Stainless Steel
The key to 316Ti’s performance is its precise composition, including the crucial addition of titanium.
| C | Si | Mn | P | S | Cr | Ni | Mo | Ti | Fe |
| ≤ 0.08 | ≤ 1.00 | ≤ 2.00 | ≤ 0.045 | ≤ 0.03 | 16.50 - 18.50 | 10.00 - 13.00 | 2.00 - 2.50 | 5x(C+N) - 0.70 | Bal |
Table 2: Typical Mechanical Properties of 316Ti Stainless Steel
Grade 316Ti offers a balance of strength and ductility, making it a reliable solution for various industrial applications.
| Property | Value |
| Tensile Strength | 500-700 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Rockwell Hardness | ≤ 95 HRB |
| Brinell Hardness | ≤ 217 HB |
Table 3: Typical Physical Properties of 316Ti Stainless Steel
These physical properties highlight the material's ability to perform reliably across a range of environments.
| Property | Value |
| Density | 8.0 g/cm³ |
| Melting Point | 1370-1400 °C |
| Thermal Expansion | 16.5 µm/m·°C (20-100°C) |
| Thermal Conductivity | 15.2 W/m·K (100°C) |
| Modulus of Elasticity | 193 GPa |
| Electrical Resistivity | 7.4 x 10⁻⁷ 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
The combination of superior corrosion resistance and high-temperature stability makes 316Ti stainless steel seamless tubes a preferred choice for:
Heat Exchangers: Especially in chemical and petrochemical plants where tubes are exposed to both corrosive fluids and high temperatures.
Chemical Processing: In systems handling hot, corrosive acids and gases.
Pulp and Paper Industry: For tubing that resists corrosion from processing fluids at elevated temperatures.
Automotive Exhaust Systems: Components that must endure corrosive exhaust gases and high heat.
Manufacturing Process
The manufacturing of a A213 TP316TI Seamless Stainless Steel Tube is a precise, multi-step process:
- Heating: A solid steel billet 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.
- Rolling and Sizing: The hollow shell is then rolled and drawn to reduce its diameter and wall thickness to the desired dimensions.
- Finishing: The tube is cut to length, heat-treated, and subjected to finishing processes like pickling to achieve its final state.
This meticulous process ensures that every 316Ti seamless tube meets the highest standards for performance and reliability in the most demanding applications.
