Seamless Stainless Steel TP310S tube
GZH is a premier manufacturer and global exporter of TP310S (UNS S31008) seamless stainless steel tubes, headquartered in Wenzhou, China. As a low-carbon version of the 310 alloy, TP310S is specifically engineered to provide superior oxidation resistance and structural integrity in continuous service temperatures up to 1035°C (1900°F).
Our SS 310S seamless tubing is manufactured using advanced cold-drawing and cold-rolling processes to meet the most stringent international standards, including ASTM A213, ASTM A269, and EN 10216-5. By controlling the carbon content, we ensure our tubes offer enhanced weldability and resistance to intergranular corrosion, making them the ideal choice for high-heat industrial infrastructure.
Technical Specifications: TP310S (UNS S31008 / 1.4845)
TP310S features a high Chromium (25%) and Nickel (20%) composition, providing a stable austenitic structure and excellent resistance to thermal fatigue.
Technical Parameter Specification & Range
Outer Diameter (OD) 6.0mm to 508mm
Wall Thickness (WT) 0.5mm to 40mm (SCH 10S - SCH XXS)
Standard Compliance ASTM A213 (Exchanger), ASTM A312 (Pipe), DIN 17458
Surface Finish Solution Annealed & Pickled (AP), Bright Annealed (BA), Polished
Testing 100% Hydrostatic, Eddy Current, PMI, and Grain Size Testing
Key Performance Benefits of GZH TP310S Tubes
• Superior Oxidation Resistance: The high chromium content allows for the formation of a protective, adherent oxide scale in oxidizing environments.
• Low Carbon Advantage: Specifically designed to minimize carbide precipitation during welding or high-temperature exposure, preventing sensitization.
• Resistance to Sulfidation: Excellent performance in moderately carburizing and sulfidizing atmospheres compared to lower-alloyed stainless steels.
• High-Precision Manufacturing: Our Wenzhou facility ensures tight dimensional tolerances and superior internal surface
What Is a Seamless Stainless Steel TP310S tube?
Stainless Steel 310S seamless tubes are high-temperature, corrosion-resistant tube crafted from a single, solid billet of a high-chromium and high-nickel austenitic stainless steel. It is manufactured without a weld joint, ensuring superior structural integrity and reliability, especially under high-stress and high-temperature conditions. The"310S"designation refers to a specific grade that is a low-carbon version of Stainless Steel 310. This lower carbon content minimizes the formation of chromium carbide precipitates during welding and subsequent exposure to temperatures in the sensitization range (800-1500°F or 425-816°C). This makes it a preferred choice for applications where the full corrosion resistance of the material needs to be maintained in the welded condition.
Key Features and Advantages
TP310S seamless tubes offer a unique combination of benefits that make them invaluable in demanding high-temperature industries:
Excellent High-Temperature Stability: It provides superior resistance to oxidation and scaling at temperatures up to 2000°F (1100°C), similar to Stainless Steel 310.
Superior 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.
Good Creep-Rupture Strength: It maintains high tensile and creep-rupture strength at elevated temperatures, ensuring long-term structural stability under high-temperature loads.
High Pressure and Temperature Tolerance: The seamless construction and robust material allow the tube to safely handle high internal pressures and extreme temperatures.
Resistance to Carburization: The alloy is highly resistant to carburization, which is crucial for applications in high-temperature furnaces and reducing atmospheres.
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 310S.
Table 1: Chemical Composition of Stainless Steel 310S
The composition of Stainless Steel 310S is carefully balanced to achieve its superior high-temperature stability and corrosion resistance.
| Cr | Ni | Mn | Si | P | S | Fe | C |
| 24.00 - 26.00 | 19.00 - 22.00 | ≤ 2.00 | ≤ 1.50 | ≤ 0.045 | ≤ 0.030 | Bal | ≤ 0.08 |
Table 2: Typical Mechanical Properties of Stainless Steel 310S
Stainless Steel 310S is specifically designed to maintain its strength and shape in high-stress, high-temperature environments.
| Property | Value (Annealed) |
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 217 HBW |
Table 3: Typical Physical Properties of Stainless Steel 310S
These physical properties highlight the material's ability to perform reliably under a wide range of conditions.
| Property | Value |
| Density | 7.9 g/cm³ |
| Melting Point | 1400 - 1450 °C approx. |
| Thermal Expansion | 16.5 µm/m·°C (20-100°C) |
| Thermal Conductivity | 14.2 W/m·K (20°C) |
| Modulus of Elasticity | 200 GPa |
| Electrical Resistivity | 0.78 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
The combination of high-temperature stability and exceptional oxidation resistance of Seamless Stainless Steel TP310S tube makes them a preferred choice for:
Heat Treating Industry: Used in radiant tubes, muffles, retorts, and other furnace parts.
Power Generation: In boiler components, reheater tubes, and steam generator tubing.
Chemical and Petrochemical Processing: For furnace tubes, burner components, and other high-temperature applications.
Cement Industry: For kiln components and other high-temperature process equipment, especially where welding is required.
