Stainless Steel 310S Pipes & Tubes

Stainless Steel 310S Pipe & Tube Manufacturer, Supplier & Exporter in India

Amardeep Steel Centre is a Mumbai based manufacturer, stockist and exporter of stainless steel 310S pipes and tubes, supplying ASTM A312 TP310S and ASME SA312 material to furnace, heat treatment, cement, glass and petrochemical projects since 1982. We hold 310S seamless and 310S welded pipe and tube ex stock to ASTM A312, A213, A249, A269 and A358, dispatched to more than 40 countries with EN 10204 3.1 Mill Test Certificates.

310S is bought for one specific reason: it can be welded and thermally cycled at high temperature without losing corrosion resistance in the heat affected zone. If your

assembly is fabricated rather than cast or machined from solid, and it will see repeated heating and cooling through the 425 to 870 °C range, 310S is the grade. If the component is static and creep strength governs, plain 310 with its higher carbon may serve better and cost slightly less.

Send your design temperature, duty cycle, size and schedule and we will confirm which of the two is correct before quoting. Request a quote or review our quality certifications.

What Is Stainless Steel 310S Pipe?

Stainless steel 310S pipe is a high-chromium, high-nickel austenitic pipe with carbon restricted to 0.08 percent maximum. The S suffix denotes the low-carbon variant of Grade 310. Chemistry is otherwise identical: 24 to 26 percent chromium, 19 to 22 percent nickel, and a silicon allowance up to 1.50 percent that contributes materially to oxidation resistance at temperature.

The reason the low-carbon variant exists is sensitisation. When plain 310, with up to 0.25 percent carbon, is held in the 425 to 870 °C range during welding or in service, carbon combines with chromium to form chromium carbides at the grain boundaries. Chromium is drawn locally out of solution, the depleted zone loses its passive film, and the material becomes vulnerable to intergranular attack. Capping carbon at 0.08 percent leaves too little carbon available for that reaction to proceed meaningfully, so a welded joint in 310S retains corrosion resistance close to the parent metal without a post-weld solution anneal.

The trade-off is a small loss of high-temperature creep strength, which is why 310H exists at the other end of the carbon range for code work where certified creep properties govern. For the full grade-selection picture see our stainless steel 310 pipes and tubes page.

SS 310S vs SS 310: The Carbon Difference and Why It Decides the Order

Practical rule: if a welding torch or a duty cycle touches the component, specify 310S. Full detail on the higher-carbon grade is on our SS 310 pipes and tubes page, and the certified-creep variant is covered under SS 310H.

Sensitisation and Welding 310S Pipe

Sensitisation occurs when chromium carbides precipitate at grain boundaries in the 425 to 870 C range. In welding, the heat affected zone passes through that band on both heating and cooling, which is why the zone adjacent to a weld is where intergranular attack starts. Time at temperature matters as much as peak temperature: a slow cool through the band is worse than a fast one.

Because 310S restricts carbon to 0.08 percent, there is insufficient carbon available to form a continuous carbide network, and the weld zone stays substantially resistant. Practical guidance for fabricators:

• Weld by TIG, MIG or plasma using matching 310S or 310 filler; avoid autogenous welding on heavy sections
• Keep interpass temperature low and cool reasonably quickly through the sensitisation band
• Post-weld solution annealing at 1040 to 1065 °C followed by rapid cooling is not normally required for 310S, unlike plain 310
• Verify with intergranular corrosion testing to ASTM A262 Practice A or E where the service condition is critical
• Do not substitute plain 310 for a 310S call-out on a welded assembly, even where stock pressure makes it tempting

ASTM A312 TP310S Pipe & Tube Specifications

Chemical Composition of SS 310S Pipes & Tubes

Mechanical and Physical Properties of Stainless Steel 310S Tubes

Equivalent Grades of TP310S Stainless Steel Pipe

SS 310S Pipe Size Chart in MM and Schedule Chart

310S stainless steel pipe dimensions follow ASME B36.19M. Outside diameter is fixed for a given NPS; the schedule sets wall thickness.

Wall thickness in mm. Sizing conventions are covered in our guide to steel pipe sizes and nominal pipe size; the full range is in our pipe dimension chart.

SS 310S Pipe Weight Chart: Weight Per Metre by Schedule

Calculated at 7,750 kg/m³. For any other size or schedule, use our steel weight calculator with the density set to 7,750. Schedule selection is explained in our guide to the difference between Schedule 40 and Schedule 80 pipe.

Types of SS 310S Pipes and Tubes We Supply

• ASTM A312 TP310S seamless pipe and ASTM A213 TP310S seamless tube: drawn or extruded with no weld seam, for critical high-temperature service. See seamless pipes and tubes.
• ASTM A312 TP310S welded pipe and ASTM A249 TP310S welded tube: seam welded and solution annealed, economical for larger bores. See welded pipes and tubes and welded austenitic tube to A249/A269.
• SS 310S ERW pipe and tube, 1/2 inch to 24 inch NB. See ERW pipe.
• SS 310S EFW and LSAW pipe, 6 inch to 100 inch NB per ASTM A358, for furnace ducting and large-bore process lines.
• SS 310S square, rectangular and hollow sections for furnace framework. See square tube and rectangular tube.
• SS 310S heat exchanger tubes, radiant tubes, U-tubes, coil tube and refractory anchors for kiln and furnace lining work.

Applications of Stainless Steel 310S Pipes & Tubes

310S appears wherever high temperature and fabrication meet. The welded, cycled applications below are where it outperforms plain 310 decisively.

• Furnace muffles, retorts, radiant tubes and welded internal structures
• Heat treatment baskets, trays, fixtures and conveyor components subject to repeated heating and cooling
• Welded heat exchanger and boiler assemblies in high-temperature service
• Cement preheater and kiln hood components, clinker cooler internals
• Glass forehearth components and high-temperature handling equipment
• Petrochemical hot gas ducting, cracking furnace components and sulphur-bearing atmospheres
• Ore calcining, rotary kiln internals and fluidised bed components
• Fabricated process equipment and pressure parts for elevated-temperature duty

Testing, Inspection and Certification

• Chemical analysis and PMI on every lot, with specific verification of the 0.08 percent carbon ceiling that distinguishes S31008 from S31000
• Intergranular corrosion testing to ASTM A262 Practice A and E, the direct check on sensitisation resistance and the most relevant test for this grade
• Mechanical testing: tensile, yield, elongation and hardness per heat and lot
• Hydrostatic testing, ultrasonic, radiographic and eddy current NDT
• Flattening, flaring and pitting resistance testing for tube products
• Macro and micro examination, heat treatment chart verification
• Third-party inspection by SGS, Bureau Veritas, TUV or Lloyd's Register on request

Every consignment ships with an EN 10204 3.1 Mill Test Certificate; 3.2 is available on request. See our testing capabilities and quality certifications.

SS 310S Pipe Price

310S pricing tracks LME nickel closely, because the grade carries 19 to 22 percent nickel against 8 to 10.5 percent in 304. The alloy surcharge component is therefore large and volatile. Price also varies with seamless versus welded construction, schedule, surface finish, quantity, certification scope and destination freight. We quote live rather than publishing a list.

Stock Availability, Export and Packing

Ex stock Mumbai from 1/2 inch to 24 inch NB in SCH 5S, 10S, 40S and 80S, with larger bores and non-standard schedules manufactured to order in three to five weeks depending on mill availability. Exports to the Middle East, Southeast Asia, Africa, Europe and the Americas on FOB, CIF and EXW terms with full documentation. Pipes are bundled with steel strapping, fitted with plastic end caps, wrapped against transit corrosion and packed in seaworthy wooden cases, each length marked with NB, schedule, specification, grade, heat number and manufacturer's symbol.

Related Products

SS 310 Pipes & Tubes, SS 310H Pipes & Tubes, SS 309H Pipes & Tubes, SS 310S Flanges, SS 310S Pipe Fittings, SS 310S Buttweld Fittings, SS 310 Refractory Anchors, SS 304, SS 316, SS 321, SS 347, 253 MA, SS 904L, Stainless Steel Pipes & Tubes, Boiler Tubes & Pipes