310S Stainless Steel Pipe
AISI 310S (UNS S31008) is an extreme high-temperature austenitic stainless steel pipe with 25% Cr and 20% Ni. Withstands continuous service up to 1150°C (2100°F) with exceptional oxidation resistance. OD 6-610mm.
| Material | Austenitic Stainless Steel (High Temperature) |
|---|---|
| Grade / Standard | AISI 310S / UNS S31008 |
| Outer Diameter (OD) | 6mm - 610mm (NPS 1/8 inch - NPS 24 inch) |
| Wall Thickness (WT) | 0.5mm - 40mm (SCH 5S / 10S / 40S / 80S / 160S) |
| Length | 3m / 6m / 12m (or cut to length) |
| Surface Treatment | coated |
| MOQ | 1 Ton |
| Delivery Time | 15-30 Days / Select Sizes In Stock |
| Loading Port | Tianjin / Shanghai / Qingdao |
Overview of 310S Stainless Steel Pipe
AISI 310S is a highly alloyed austenitic stainless steel engineered specifically for extraordinary high-temperature service and exceptional resistance to oxidation. Specified under ASTM A312 / ASTM A213 standards with UNS designation S31008, 310S stainless steel pipe contains a massive nominal composition of 25% Chromium and 20% Nickel. This uniquely high alloy content allows the pipe to withstand continuous service temperatures up to 1150°C (2100°F) in oxidizing atmospheres, and intermittent service up to 1035°C (1895°F). The “S” designation stands for its low carbon content (≤0.08%), which minimizes carbide precipitation during welding and high-temperature exposure, ensuring fabricability and structural stability.
Unlike lower-alloy grades, 310S stainless steel pipe forms a tenacious, protective oxide scale at extreme temperatures, preventing severe scaling and spalling during thermal cycling. Furthermore, its high nickel content provides substantial resistance to thermal fatigue, carburizing, and sulfidizing environments. Available primarily in robust seamless forms for critical heat-exchanger and furnace tube applications, as well as welded forms for large industrial exhaust systems, 310S is the ultimate piping material for the power generation, metallurgical, petrochemical, and advanced thermal processing industries.
Key Features and Manufacturing Methods
Manufacturing 310S stainless steel pipe requires specialized metallurgical control to maintain its high-temperature properties. Seamless 310S pipes (per ASTM A312/A213) are extruded from premium S31008 solid billets, followed by intensive cold drawing or hot finishing. The seamless structure is vital for maintaining pressure integrity and creep resistance inside high-temperature furnaces and boilers. Welded 310S pipes are formed from high-grade cold-rolled coils using precise TIG, plasma, or laser welding, followed by heavy bead working and a full high-temperature solution anneal (minimum 1040°C) with rapid quenching to ensure a uniform austenitic structure.
Supplied in an outer diameter range spanning from 6mm to 610mm (with larger diameters available as welded) and wall thicknesses from 0.5mm to 40mm (up to SCH 160S/XXS), these pipes are built to endure. The standard delivery condition is solution annealed with a white pickled or mill finish, which optimally prepares the surface for high-temperature oxide formation. Every pipe is subjected to stringent quality protocols, including exact chemical composition verification (PMI), mandatory hydrostatic or non-destructive eddy current testing, tensile testing, and grain size evaluation to ensure flawless performance in extreme thermal environments.
Main Applications of 310S Stainless Steel Pipe
310S stainless steel pipe is the cornerstone of high-temperature industrial infrastructure. In the thermal processing and metallurgical industries, it is extensively used for radiant tubes, muffle furnaces, annealing covers, burner components, kiln linings, and high-temperature conveyor rollers. The power generation sector relies heavily on 310S for coal-fired boiler baffles, tube hangers, superheater tubes, and advanced fluidized bed combustion systems where extreme heat and abrasive ash are present.
In the petrochemical and chemical processing fields, 310S is vital for flare stacks, ethylene pyrolysis coils, styrene production tubes, and thermal oxidizers operating in harsh carburizing or mildly sulfidizing atmospheres. Interestingly, because its heavily alloyed austenitic structure prevents the ductile-to-brittle transition at low temperatures, 310S is also exceptionally tough in cryogenic environments, making it suitable for liquid gas processing (LNG) and cryogenic storage systems down to -268°C (-450°F). Whether enduring the intense heat of a steel mill or the deep freeze of cryogenics, 310S provides unparalleled material stability.
Why Choose Us for 310S Stainless Steel Pipe
Shandong Tanglu Metal Material Co., Ltd. is a specialized supplier of high-temperature superalloys, providing top-tier 310S stainless steel pipes manufactured by China’s leading ISO 9001, ASME, and PED-certified mills. The performance of 310S depends entirely on its high Chromium and Nickel chemistry; therefore, we implement strict 100% PMI (Positive Material Identification) and laboratory spectrographic analysis on every batch, ensuring the Cr (24-26%) and Ni (19-22%) levels strictly meet ASTM/EN standards for optimal oxidation resistance.
We maintain strategic stocks of standard high-temperature SCH 40S and SCH 80S seamless 310S pipes to support urgent furnace repairs and boiler turnarounds, minimizing your costly downtime. Our technical sales team is highly experienced in supporting complex EPC thermal projects, offering custom cut-to-length services, special beveling, and comprehensive export documentation. Every shipment is rigorously packaged in seaworthy bundles or heavy wooden crates to prevent transit damage, and comes with full traceability via an original EN 10204 3.1 Mill Test Certificate, with third-party inspections (SGS, TUV, BV) readily accommodated.
📐 Dimension & Size Table
| OD (inch / mm) | WT SCH 10S (mm) | WT SCH 40S (mm) | WT SCH 80S (mm) |
|---|---|---|---|
| 1/8" (10.3mm) | 1.24 | 1.73 | 2.41 |
| 1/4" (13.7mm) | 1.65 | 2.24 | 3.02 |
| 1/2" (21.3mm) | 2.11 | 2.77 | 3.73 |
| 3/4" (26.7mm) | 2.11 | 2.87 | 3.91 |
| 1" (33.4mm) | 2.77 | 3.38 | 4.55 |
| 1-1/2" (48.3mm) | 2.77 | 3.68 | 5.08 |
| 2" (60.3mm) | 2.77 | 3.91 | 5.54 |
| 2-1/2" (73.0mm) | 3.05 | 5.16 | 7.01 |
| 3" (88.9mm) | 3.05 | 5.49 | 7.62 |
| 4" (114.3mm) | 3.05 | 6.02 | 8.56 |
| 6" (168.3mm) | 3.40 | 7.11 | 10.97 |
| 8" (219.1mm) | 3.76 | 8.18 | 12.70 |
| 10" (273.0mm) | 4.19 | 9.27 | 15.09 |
| 12" (323.8mm) | 4.57 | 10.31 | 17.48 |
| 14" (355.6mm) | 4.78 | 11.13 | 19.05 |
| 16" (406.4mm) | 4.78 | 12.70 | 21.44 |
| 18" (457.0mm) | 4.78 | 14.27 | 23.83 |
| 20" (508.0mm) | 5.54 | 15.09 | 26.19 |
| 24" (610.0mm) | 6.35 | 17.48 | 30.96 |
* Custom sizes available upon request. Tolerances per relevant international standards.
🔬 Chemical Composition
| Element | Min | Max | Display Value | Note |
|---|---|---|---|---|
| C | - | 0.08 | ≤0.08 | Low carbon 'S' grade (ASTM A312 TP310S) |
| Si | - | 1.50 | ≤1.50 | Higher Si enhances oxidation resistance |
| Mn | - | 2.00 | ≤2.00 | |
| P | - | 0.045 | ≤0.045 | |
| S | - | 0.030 | ≤0.030 | |
| Cr | 24.00 | 26.00 | 24.00-26.00 | Massive Cr for extreme oxidation resistance |
| Ni | 19.00 | 22.00 | 19.00-22.00 | High Ni for structural stability & toughness |
| Fe | - | - | Balance | Base element |
* Chemical composition may vary by heat, thickness and specification. Please refer to the actual mill test certificate.
⚙️ Mechanical Properties
| Property | Value | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength (Rm) | ≥515 | MPa | Solution annealed, per ASTM A312 |
| Yield Strength (Rp0.2) | ≥205 | MPa | 0.2% proof stress |
| Elongation (A) | ≥35 | % | Gauge length 50mm |
| Brinell Hardness (HBW) | ≤192 | HBW | Solution annealed |
| Rockwell Hardness (HRB) | ≤90 | HRB | Solution annealed |
| Max Service Temp | 1150 | °C | Continuous oxidation service |
| Hydrostatic Test | Pass | - | Mandatory per ASTM A312 |
| Density | 7.98 | g/cm³ | Reference value |
* Values shown are minimum requirements unless otherwise stated.
📦 Commercial Information
| Packaging | High-value 310S pipes are packed with extreme care to prevent transit damage. Standard packing includes hexagonal bundles securely tied with thick steel strapping (with protective spacers). Both ends of the pipes are fitted with durable plastic or metal caps to protect the bevels and prevent internal debris. Because 310S is often a highly critical and expensive material, heavy-duty wooden crates (fumigated ISPM-15) are frequently utilized for export, especially for smaller diameter or thin-wall tubes. Every bundle or crate is clearly marked with waterproof metal tags displaying the Heat Number, Grade (TP310S), Dimensions, and standard. |
|---|---|
| Payment Terms | T/T (Telegraphic Transfer),L/C (Letter of Credit),D/P (Documents against Payment),Western Union |
| Price Term | FOB,CFR,CIF,EXW |
| Supply Capacity | 1,000 Tons/Month (High Temperature Specialty Pipes) |
| Loading Port | Tianjin / Shanghai / Qingdao |
Why Choose Our 310S Stainless Steel Pipe?
Extreme Heat Resistance up to 1150°C
Engineered for the harshest thermal environments, 310S maintains its integrity and resists scaling in continuous service up to 1150°C (2100°F) and intermittent service up to 1035°C (1895°F).
25% Chromium / 20% Nickel Alloy
The massive alloy content forms a highly tenacious oxide layer that protects against thermal fatigue, severe oxidation, and moderately carburizing/sulfidizing atmospheres.
Superior Weldability & Stability
The "S" designation indicates low carbon (≤0.08%), which significantly reduces carbide precipitation during welding, maintaining structural stability and fabricability without severe embrittlement.
Dual Cryogenic Capabilities
Due to its stable, heavily alloyed austenitic structure, 310S does not become brittle at extreme low temperatures, exhibiting excellent toughness down to -268°C (-450°F) for cryogenic gas applications.
100% Traceability & Certification
Produced under strict ISO/ASME/PED standards. Supplied with original EN 10204 3.1 Mill Test Certificates, complete chemical analysis (PMI verified), and mandatory hydrostatic/NDT testing.
🏭 Applications of 310S Stainless Steel Pipe
310S stainless steel pipe is strictly designated for environments that would rapidly destroy standard stainless grades. In the Metallurgical and Thermal Processing sectors, it is the primary material for constructing industrial furnaces, radiant heating tubes, muffle furnaces, annealing covers, burner nozzles, kiln linings, and high-temperature conveyor rollers. The Power Generation industry utilizes heavy-wall 310S pipes for coal-fired boiler baffles, tube hangers, superheater tubes, and advanced fluidized bed combustion systems where extreme heat and abrasive ash are constant. In the Petrochemical and Chemical Processing fields, it is vital for flare stacks, thermal oxidizers, ethylene pyrolysis coils, and styrene production lines operating in aggressive carburizing or mildly sulfidizing atmospheres. Furthermore, because its heavily alloyed austenitic structure prevents the ductile-to-brittle transition at low temperatures, 310S is exceptionally tough in cryogenic environments, making it a premium choice for liquid natural gas (LNG) processing, aerospace liquid oxygen lines, and deep cryogenic storage systems.
📋 Quality & Certification
Our Certifications
- ✅ ISO 9001:2015
- ✅ Bureau Veritas (BV)
- ✅ SGS Certified
Mill Certificate Type
- 📋 EN 10204 3.1
- 📋 EN 10204 3.2
- 📋 Original Mill Certificate
- 📋 Third Party Inspection Available
❓ Frequently Asked Questions
What is the difference between 310 and 310S stainless steel pipe?
The primary difference lies in the carbon content. Standard grade 310 can contain up to 0.25% carbon, which provides high strength but makes it difficult to weld and prone to severe carbide precipitation (sensitization). 310S (UNS S31008) is the low-carbon version, with carbon restricted to a maximum of 0.08%. This lower carbon content vastly improves weldability, minimizes sensitization in the heat-affected zone, and maintains structural integrity. For almost all industrial piping and fabrication applications, 310S is the standard grade produced and supplied.
What is the maximum operating temperature for 310S pipe?
310S stainless steel provides excellent oxidation resistance in continuous service up to 1150°C (2100°F). However, if the application involves thermal cycling (intermittent heating and cooling), the maximum recommended service temperature is slightly lower, around 1035°C (1895°F), to prevent the protective oxide scale from spalling off. It is widely recognized as one of the most heat-resistant standard austenitic stainless steel grades available.
When should I use 310S instead of 321 stainless steel pipe?
Both are high-temperature alloys, but they serve different temperature ranges. 321 is ideal for service temperatures between 427°C and 815°C (800°F - 1500°F); its titanium addition prevents intergranular corrosion in this range. However, above 815°C, 321 begins to oxidize and lose strength rapidly. 310S, with its massive 25% Chromium and 20% Nickel content, is designed to take over where 321 leaves off, operating reliably from 815°C all the way up to 1150°C (1500°F - 2100°F). If your process consistently exceeds 800°C, 310S is the mandatory choice.
Is 310S stainless steel pipe suitable for cryogenic applications?
Yes, exceptionally so. Despite being famous for high-temperature resistance, 310S has an incredibly stable austenitic structure due to its 20% Nickel content. This prevents the steel from undergoing a ductile-to-brittle phase transition at low temperatures. 310S maintains excellent toughness and high impact strength down to cryogenic temperatures as low as -268°C (-450°F), making it an outstanding dual-use material for LNG, liquid oxygen, and other cryogenic fluid handling systems.
Does 310S resist carburizing and sulfidizing environments?
Yes, 310S exhibits very good resistance to carburizing (carbon-absorbing) environments due to its high nickel content, making it popular in petrochemical thermal processing. It also resists mildly sulfidizing atmospheres (containing sulfur compounds) at high temperatures better than standard 304 or 316. However, in extremely aggressive sulfidizing environments, specifically where reducing conditions exist, specialized higher-nickel alloys (like Incoloy 800 or Inconel 600 series) might be required.
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