Seamless Stainless Steel TP316Ti Pipe
Distinguished by the strategic addition of Titanium (Ti), our TP316Ti tubing prevents carbide precipitation during prolonged exposure to temperatures in the 425°C - 815°C (800°F - 1500°F) range. This makes them indispensable for mission-critical applications in pharmaceutical processing, chemical reactors, and marine environments where standard 316 grades may fail. Through advanced cold-drawing and precise solution annealing, GZH ensures every pipe maintains a uniform microstructure and optimized creep strength, providing a reliable choice for aggressive industrial media.
What is a Seamless Stainless Steel TP316Ti Pipe?
Seamless Stainless Steel TP316Ti Pipe is a cylindrical tube crafted from a single, solid billet of stainless steel. Its seamless construction provides enhanced structural integrity and pressure ratings.
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 pipe maintains its superior corrosion resistance even after being exposed to elevated temperatures.
Key Features and Advantages
Seamless TP316Ti Stainless Steel Pipe 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 TP316Ti 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 Pipe Size Tolerance Size Chart :
| Standard | OD(D) | Tolerance（MM) | Thickness(S) | Tolerance(MM) | Length | Tolerance | |
| MM | Common | High | MM | MM | |||
| ASTM A312 | D≤48.3 | +0.4/-0.8 | 10.3 | +20%-12.5% | +6.0/0 | ||
| 48.3 | ±0.8 | 88.9 | +22.5%/-12.5% | ||||
| 114.3 | +1.6/-0.8 | 88.9 | +15%/-12.5% | ||||
| 219.1 | +2.4/-0.8 | D≥508, t/D≤5%,SMLS | +22.5%/-12.5% | ||||
| 457.2 | +3.2/-0.8 | D≥508, t/D>5%,SMLS | +15%/-12.5% | ||||
| 660.4 | +4.0/-0.8 | D≥508, WELD | +17.5%/-12.5% | ||||
| 863.6 | +4.8/-0.8 | ||||||
| JIS 3459 Hot-Finished Smls Pipe | D＜50 | ±0.51 | S＜4 | ±0.5 | |||
| D≥50 | ±1.0% | S≥4 | ±12.5% | ||||
| JIS 3459 Cold-Finished | D＜30 | ±0.3 | S＜2 | ±0.2 | |||
| D≥30 | ±1.0% | S≥2 | ±10.0% | ||||
| JIS G3463 Hot-Finished Smls Pipe | 100 | +0.4/-0.8 | D＜100，S<2 | / | D<50, L<7M | +7/0 | |
| D＜100，2≤S<2.4 | +40%/0 | D<50,7< L<10M | +10/0 | ||||
| D＜100，2.4≤S<3.8 | +35%/0 | ||||||
| D＜100，3.8≤S<4.6 | +33%/0 | ||||||
| D＜100，4.6≤S | +28%/0 | D<50,10< L<13M | +13/0 | ||||
| 100≤D<120 | +0.4/-1.2 | D>100, S＜2 | / | ||||
| 120≤D<160 | D>100，2≤S<2.4 | / | D<50,13M< L | +15/0 | |||
| 160≤D<200 | +0.4/-1.8 | D>100，2.4≤S<3.8 | +35%/0 | ||||
| 200≤D | +0.4/-2.4 | D>100，3.8≤S<4.6 | +33%/0 | D>50,7< L<7M | +10/0 | ||
| D>100，4.6≤S | +28%/0 | ||||||
| JIS G3463 Cold-finished | <60 | +0.4/-0.8 | D<40, S<2.0 | +0.4/0 | |||
| 60≤D<80 | ±0.3 | D<40, S≥2.0 | +20%/0 | D>50,7< L<10M | +13/0 | ||
| 80≤D<100 | ±0.4 | D≥40 | +22%/0 | ||||
| 100≤D<120 | +0.4/-0.6 | ||||||
| 120≤D<160 | +0.4/-0.8 | D>50,10M< L | +15/0 | ||||
| 160≤D<200 | +0.4/-1.2 | ||||||
| 200≤D | +0.4/-1.6 | ||||||
| GB/T 14975 冷拔(扎)钢管 | D<12.7 | ±0.3 | ±0.1 | 所有壁厚，普通级PA | +12.5%/-10% | ||
| 12.7 | ±0.15 | ||||||
| 38.1 | ±0.4 | ±0.3 | |||||
| 88.9 | ±0.9% | ±0.4 | |||||
| 139.7 | ±0.8 | 所有壁厚，高级PC | ±10% | ||||
| 203.2 | ±1.1 | ||||||
| 219.1 | ±1.6 | ||||||
| D≥323.9 | ±0.5% | ||||||
| GB/T 14976 冷拔(轧)钢管 | 6 | ±0.2 | ±0.15 | S≤3 | ±12%(10% /0高级PC) | ||
| 10≤D<30 | ±0.2 | ±0.2 | |||||
| 30≤D<50 | ±0.2 | ±0.3 | S>3 | +12.5%/-10%(10%/0高级PC) | |||
| 50≤D<219 | 0.85% | 0.75% | |||||
| D>219 | 0.9% | 0.8% | Smin, all | +22%/0(+20%/0高级PC) | |||
Common Applications of Seamless Stainless steel TP316Ti pipe
The combination of superior corrosion resistance and high-temperature stability makes 316Ti stainless steel seamless pipes a preferred choice for:
Heat Exchangers: Especially in chemical and petrochemical plants where pipes are exposed to both corrosive fluids and high temperatures.
Chemical Processing: In systems handling hot, corrosive acids and gases.
Pulp and Paper Industry: For piping that resists corrosion from processing fluids at elevated temperatures.
Automotive Exhaust Systems: Components that must endure corrosive exhaust gases and high heat.
Manufacturing Process of Stainless Steel TP316Ti Seamless Pipe
The manufacturing of a 316Ti seamless pipe 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 pipe 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 pipe meets the highest standards for performance and reliability in the most demanding applications.
