We are Riddhi Siddhi Impex, a Mumbai-based Stainless Steel 310S Foils manufacturer and supplier, established in 2002. We slit heat-resistant austenitic foil to ASTM A240 / ASME SA-240 in thicknesses from 0.03 mm to 0.08 mm. As an ISO 9001, 14001, and 45001 certified company, we keep a ready stock, a 400-500 tons monthly supply capacity, and issue EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Stainless Steel 310S foils are thin, flat-rolled sections of a 25% chromium, 20% nickel austenitic grade built for sustained heat. The high chromium forms a tight, adherent oxide scale that resists spalling, so the foil holds up in oxidising atmospheres to around 1100 °C. A low carbon ceiling of 0.08% curbs carbide precipitation and keeps weld zones sound. Engineers reach for the grade where thin gauge must survive furnace heat and combustion atmospheres without scaling away. Stainless Steel 310S foils find typical use in furnace linings, heat exchangers, and high-temperature combustion components, resisting oxidation up to 1100°C.
As a reliable stainless steel 310S foil supplier, we slit every 310S stainless steel foil in-house from stainless steel coil. Material ships annealed to ASTM A240, in any width from 3 mm to 2000 mm, with BA, 2B, Matte PVC, and Matte surfaces. Our quality team follows stainless steel foil from processing to final dispatch, with test certificates issued on request.
We provide ASTM A240 Type 310S foil in annealed soft condition, with four surface finishes and three edge profiles, slit to your required width from ready stock.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Thickness | 0.03 mm to 0.08 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (Soft) |
| Supply Forms | Cold rolled |
| Surface Finish | BA (Bright Annealed), 2B, Matte, Matte PVC |
| Edge | Slit edge, Deburred edge, Round edge |
Chromium in the 24.0 to 26.0% band drives oxidation resistance, and 19.0 to 22.0% nickel keeps the austenite stable at temperature. The full A240 chemistry appears below.
| Element | Composition (% by weight) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Silicon (Si) | 1.50 max |
| Chromium (Cr) | 24.0 to 26.0 |
| Nickel (Ni) | 19.0 to 22.0 |
| Iron (Fe) | Balance |
In the annealed state, 310S foil reaches a 515 MPa tensile minimum and 205 MPa yield, with 40% elongation for clean forming. The grade is not temper rolled, and values below roughly 0.38 mm gauge are indicative.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
515 MPa (75 ksi) |
|
Yield Strength (0.2% offset), minimum
|
205 MPa (30 ksi) |
|
Elongation in 50 mm, minimum
|
40% |
Buyers ordering to a regional standard can cross-reference UNS S31008 foil below. Each designation names the same low-carbon 25-20 heat-resisting austenitic grade.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S31008 |
| Europe (EN) | X8CrNi25-21 |
| Germany (W.Nr) | 1.4845 |
| Japan (JIS) | SUS310S |
| China (GB) | 06Cr25Ni20 |
| Russia (GOST) | 20Х23Н18 |
These 4 industries widely use the SS 310S foil we slit. In each, buyers choose the grade for oxidation resistance, creep strength, and stability under sustained heat, not for room-temperature strength.
Furnace builders line muffles, retorts, and radiant tube supports with Type 310S foil because the oxide scale stays put through repeated heating. Baffles, burner shrouds, and fixtures last for years at red heat where lower-alloy grades scale and warp. Thin gauge lets the foil wrap tight radii inside the hot zone.
Refinery fired heaters and reformer sections fit UNS S31008 foil around radiant tubes, seals, and wraps in combustion atmospheres. The 25% chromium content resists the sulphidation and carburisation that thin ordinary austenitics. Welded joints stay sound because the low carbon limits carbide precipitation at grain boundaries.
Power plants specify 310S stainless steel foil for boiler seals, superheater spacers, and expansion bellows that flex under thermal cycling. Creep strength across the 900 to 1100 °C band holds thin sections stable between shutdowns. It tolerates the oxidising flue-gas environment without the scaling that forces early replacement.
Gasket and expansion-joint makers buy Alloy 310S foil for spiral-wound filler strip, bellows, and piston-ring shims in hot service. Precision slitting to ±0.1 mm lets the foil laminate into multi-ply seals without edge burr. Dimensional stability under heat keeps sealing faces flat through pressure and temperature swings.
Consignments issued from our Mumbai and Taloja warehouses in wooden cases or on pallets, papers complete for export.
| Parameter | Details |
|---|---|
| Packaging | Wooden cases, pallet packing |
| Incoterms | FOB, CIF, CFR, EXW Mumbai |
| Dispatch Points | Mumbai and Taloja warehouses |
| Standard Lead Time | 4 to 5 days |
| Urgent Dispatch | 2 to 3 days |
| Payment Terms | Advance, credit, LC |
| Certification | EN 10204 Type 3.1 / 3.2 mill test certificates on request |
Stainless Steel 310S Foils sell in India at roughly ₹163 to ₹700 per kg, with export pricing commonly around $2.85 to $6.37 per kg depending on size, finish, and quantity. Nickel and chromium content, gauge, slit width, finish, and order size all move the figure. Volume discounts apply, so call or WhatsApp us for today's rate.
We slit Stainless Steel 310S foil from 0.03 mm to 0.08 mm thick and to any width between 3 mm and 2000 mm, held to ±0.1 mm. Heavier flat-rolled stock falls under our Stainless Steel 310S Coils range.
The difference between 310S foil and SS 310 foil is carbon content. Type 310S caps carbon at 0.08% against 0.25% for Type 310, which lowers carbide precipitation and keeps welded thin gauge resistant to intergranular attack. Type 310 carries slightly higher strength at temperature.
SS 310S foils resist oxidation in continuous service up to around 1100 °C, owing to 24 to 26% chromium and 19 to 22% nickel. The adherent oxide scale limits metal loss even under thermal cycling.
Available finishes for 310S stainless steel foils are BA (Bright Annealed), 2B, Matte, and Matte PVC. We supply both hot rolled and cold rolled material with slit, deburred, or round edges.
You can source Stainless Steel 310S Foils in India from us at Riddhi Siddhi Impex. Our Mumbai warehouse holds UNS S31008 foil ready for dispatch in 4 to 5 days, or 2 to 3 days when urgent. As a manufacturer, supplier, and exporter, we ship to buyers across India and abroad. Phone or WhatsApp us; quotes will be provided within 24 hours.
