310S Stainless Steel Seamless Pipe DN80 SCH40S High Temperature Resistant

310S stainless steel (UNS S31008) is an austenitic chromium-nickel alloy designed for extreme high-temperature applications. Its high chromium (24–26%) and nickel (19–22%) content ensures exceptional oxidation resistance, creep strength, and corrosion durability up to 1150°C continuously and 1200°C intermittently238. Below are key details structured for technical reference.

1. Chemical Composition

310S prioritizes oxidation resistance and high-temperature stability through balanced alloying:

Table: Chemical Composition (Weight %)5710

2. Mechanical & Physical Properties

Optimized for high-temperature structural integrity:

Table: Mechanical Properties (Room Temperature)2510

Table: Physical Properties10

3. Standards & Equivalent Grades

Widely standardized globally for seamless/welded tubes:

Table: International Equivalents356

Key Standards:

• Seamless Tubes: ASTM A213, ASME SA213, EN 10216-559

• Welded Tubes: ASTM A312, ASME SA3129

• Fittings: ASTM A403 (WP310S for forged parts)6

4. Applications

310S tubes excel in thermally aggressive environments:

• Energy & Petrochemical: Boiler tubes, reheaters, refinery heaters, fluidized bed combustors89.

• Industrial Furnaces: Radiant tubes, kiln linings, burner nozzles, annealing covers39.

• Waste & Processing: Incinerators, salt pots, food processing equipment89.

• Mechanical Components: Heat exchanger tubing, thermocouple sleeves, high-pressure piping57.

5. Packaging & Specifications

• Dimensions:

  • OD: 6–914 mm (seamless); up to 24" NB (welded)19

  • Thickness: 0.3–50 mm (SCH 5 to XXS)9

  • Length: 3,500–7,500 mm (6,000 mm standard)1

• Packaging: Plastic caps, woven bags, wooden crates1.

• Tolerance:

  • Outer Diameter: ±0.5% (D2 grade)7

  • Straightness: ≤1.5 mm1.

6. Special Processing

• Surface Finish: Annealed/pickled, polished, bright-annealed (BA)59.

• Ends: Plain, beveled, threaded5.

• Heat Treatment: Solution-annealed at ≥1040°C, water-quenched6.