ASTM A312 TP310S SCH 10S stainless steel pipe is a high-alloy austenitic stainless steel pipe specifically designed for elevated temperature and oxidation-resistant service. Manufactured according to the specification issued by ASTM International, TP310S offers excellent high-temperature strength, outstanding oxidation resistance, and good fabrication performance.
Schedule 10S (SCH 10S) indicates a thinner wall thickness under ASME B36.19M, commonly used in low-pressure, high-temperature piping systems where corrosion resistance and heat resistance are primary requirements.
Standard & Material Information
Standard: ASTM A312 / A312M
Grade: TP310S (UNS S31008)
Schedule: SCH 10S
Dimension Standard: ASME B36.19M
Manufacturing Type: Seamless (SMLS) / Welded (WLD)
Heat Treatment: Solution Annealed
Inspection Certificate: EN 10204 3.1 / 3.2 available
TP310S is the low-carbon version of 310 stainless steel, designed to minimize carbide precipitation during welding.
Chemical Composition of TP310S
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 19.0 – 22.0 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.50 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
High chromium and nickel content provides superior oxidation resistance at temperatures up to 1100°C in intermittent service.
Mechanical Properties
| Property | Minimum Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 205 MPa |
| Elongation | 35% |
| Hardness | ≤ 217 HB |
TP310S maintains good strength and structural stability at elevated temperatures compared to standard 304 or 316 grades.
What Is Schedule 10S?
Schedule 10S refers to a thin-wall stainless steel pipe classification under ASME B36.19M.
Example dimensions:
| NPS | OD (mm) | Wall Thickness SCH 10S (mm) | Wall Thickness (inch) |
|---|---|---|---|
| 2" | 60.33 | 2.77 | 0.109" |
| 4" | 114.30 | 3.05 | 0.120" |
| 6" | 168.28 | 3.40 | 0.134" |
| 8" | 219.08 | 3.76 | 0.148" |
SCH 10S is typically used in:
Low-pressure systems
High-temperature exhaust systems
Furnace and heat-treatment piping
Why Choose TP310S for High-Temperature Service?
✔ Excellent Oxidation Resistance
High chromium (25%) improves scaling resistance at extreme temperatures.
✔ Superior Heat Resistance
Performs reliably up to:
1040°C continuous service
1100°C intermittent exposure
✔ Structural Stability
Resists thermal fatigue and cyclic heating conditions.
✔ Good Weldability
Low carbon content reduces risk of intergranular corrosion after welding.
Typical Applications
🔥 Furnace & Heat Treatment Industry
Furnace tubes
Radiant tubes
Kiln liners
🏭 Petrochemical Plants
High-temperature process piping
Reformers
Catalyst handling systems
⚡ Power Generation
Boiler components
Superheater piping
🚗 Exhaust Systems
High-temperature gas transport lines
TP310S vs TP304 / TP316
| Property | TP304 | TP316 | TP310S |
|---|---|---|---|
| Chromium | 18–20% | 16–18% | 24–26% |
| Nickel | 8–11% | 10–14% | 19–22% |
| Molybdenum | No | Yes | No |
| High Temp Resistance | Moderate | Good | Excellent |
| Oxidation Resistance | Good | Better | Superior |
For applications above 900°C, TP310S is significantly more reliable than 304 or 316 grades.
Manufacturing & Inspection
Typical quality control includes:
Chemical composition analysis
Mechanical testing
Hydrostatic test
Ultrasonic testing (UT)
Radiographic testing (RT)
PMI testing
Third-party inspection (SGS / BV / TUV available)
All pipes are marked with heat number for full traceability.
Key Advantages of TP310S SCH 10S Pipe
✔ Outstanding high-temperature strength
✔ Excellent oxidation resistance
✔ Good weldability
✔ Suitable for cyclic heating conditions
✔ Cost-effective compared to nickel-based alloys
✔ Ideal for thin-wall, heat-resistant piping systems
FAQ
1️⃣ What is ASTM A312 TP310S SCH 10S stainless steel pipe?
ASTM A312 TP310S SCH 10S pipe is a high-chromium, high-nickel austenitic stainless steel pipe manufactured according to the specification issued by ASTM International. It is specifically designed for high-temperature service with excellent oxidation resistance. Schedule 10S refers to a thin-wall stainless steel pipe classification under ASME B36.19M.
2️⃣ What temperature can TP310S withstand?
TP310S is suitable for:
Continuous service up to approximately 1040°C
Intermittent exposure up to 1100°C
Its high chromium (24–26%) content provides strong resistance to scaling and oxidation at elevated temperatures.
3️⃣ Why choose TP310S instead of 304 or 316 for high-temperature applications?
Compared with 304 and 316:
TP310S contains higher chromium and nickel
Better oxidation resistance above 900°C
Improved structural stability under cyclic heating
For furnace systems and high-heat process piping, TP310S is significantly more reliable.
4️⃣ What does Schedule 10S mean?
Schedule 10S indicates:
Thinner wall thickness
Lower weight per meter
Suitable for low-pressure systems
It is commonly used in high-temperature exhaust systems, furnace piping, and heat treatment equipment where pressure is not the primary concern.
5️⃣ Is TP310S suitable for high-pressure applications?
Generally, SCH 10S is not intended for high-pressure systems due to its thin wall thickness.
For high-pressure and high-temperature environments, thicker schedules such as SCH 40S or SCH 80S may be required.
6️⃣ Is TP310S weldable?
Yes. TP310S offers:
Good weldability
Low risk of intergranular corrosion due to controlled carbon content
Compatibility with common austenitic stainless steel welding processes
Proper filler metal selection is recommended for high-temperature service.
7️⃣ What industries commonly use TP310S SCH 10S pipes?
Typical applications include:
Furnace and heat treatment plants
Petrochemical processing units
Power generation facilities
Boiler and superheater systems
High-temperature exhaust gas pipelines
8️⃣ How does TP310S perform in corrosive environments?
TP310S performs well in:
Oxidizing atmospheres
High-temperature gas exposure
Mild chemical environments
However, it is not primarily designed for strong chloride corrosion resistance like TP316L.
9️⃣ What quality inspections are provided?
Professional manufacturers typically offer:
Chemical composition analysis
Mechanical testing
Hydrostatic testing
Ultrasonic testing (UT)
Radiographic testing (RT)
PMI (Positive Material Identification)
EN 10204 3.1 MTC
Third-party inspection (SGS / BV / TUV upon request)
🔟 How do I select a reliable TP310S pipe supplier?
When sourcing TP310S SCH 10S pipes, verify:
Compliance with ASTM A312
Accurate dimensional tolerance (ASME B36.19M)
Heat treatment condition (solution annealed)
Full inspection documentation
Experience in high-temperature projects
For furnace or petrochemical projects, technical support from the manufacturer is essential.
