We are Riddhi Siddhi Impex, a Mumbai-based Incoloy 800 Shims manufacturer, supplier, and exporter, established in 2002. We slit nickel-iron-chromium Alloy 800 shim stock to ASTM B409 / ASME SB-409 in thicknesses from 0.03 mm to 5 mm, while the width is held to ±0.1 mm. Our ISO 9001, 14001, and 45001-certified company holds ready stock, a supply capacity of 400-500 tonnes monthly, and issues EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Incoloy 800 shims are thin, flat spacers slit from nickel-iron-chromium alloy carrying 30 to 35% nickel and 19 to 23% chromium over a 39.5% minimum iron balance. Small additions of aluminium and titanium stabilise the alloy's microstructure during prolonged high-temperature service up to approximately 816°C. Density is at 7.94 g/cm³, and the grade holds its clearance where standard stainless spacers scale away. Incoloy 800 shims are typically used for high-temperature alignment in industrial furnaces and heat exchangers.
As a reliable Incoloy 800 shim supplier, we slit all our incoloy shims in-house on our own lines rather than reselling stock widths. The finished material is annealed and soft from 3 mm to 2000 mm, with a mill test certificate accompanying each order when requested.
We provide ASTM B409 Incoloy 800 shim stock in annealed condition, cold rolled, precision-slit to width with a choice of surface finishes and edge options.
| Parameter | Details |
|---|---|
| Standard | ASTM B409 / ASME SB-409 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (Soft) |
| Surface Finish | BA (Bright Annealed), 2B, Matte |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Nickel and chromium set the character of this grade. Alloy 800 shims pair 30 to 35% nickel with 19 to 23% chromium, while aluminium and titanium stabilise the microstructure during prolonged high-temperature exposure. The ASTM B409 composition appears below.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 30.0 to 35.0 |
| Chromium (Cr) | 19.0 to 23.0 |
| Iron (Fe) | 39.5 min |
| Carbon (C) | 0.10 max |
| Manganese (Mn) | 1.50 max |
| Silicon (Si) | 1.00 max |
| Copper (Cu) | 0.75 max |
| Sulphur (S) | 0.015 max |
| Aluminium (Al) | 0.15 to 0.60 |
| Titanium (Ti) | 0.15 to 0.60 |
Our annealed Incoloy 800 Shim stock delivers a 520 MPa minimum tensile strength with 30% elongation, making them suitable for punching and forming into precision shims. Under ASTM B409, yield and elongation minimums apply at 0.508 mm and above; figures for thinner shims are indicative. No temper ladder applies to this grade.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
520 MPa (75 ksi) |
|
Yield Strength (0.2% offset), minimum
|
205 MPa (30 ksi) |
|
Elongation in 50 mm, minimum
|
30% |
International buyers can match the W.Nr 1.4876 shim stock we slit against their regional standard below. Every designation listed refers to the same alloy.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | N08800 |
| Europe (EN) | X10NiCrAlTi32-20 |
| Germany (W.Nr.) | 1.4876 |
| Japan (JIS) | NCF 800 |
| Russia (GOST) | ЭИ670 |
| AFNOR | Z8NC32-21 |
| BS | NA 15 |
These 4 industries use the Incoloy 800 shims the most. Buyers pick the grade for oxidation resistance, carburisation resistance, and dimensional stability through long thermal exposure.
Exchanger fabricators set tube bundles, seal faces, and expansion gaps with Alloy 800 shims. The alloy rides out repeated heating and cooling without embrittling, so gap settings survive years of cycling. A shim slit to ±0.1 mm seats without site trimming.
Process plants place UNS N08800 shims under cracking-furnace internals, reformer hardware, and hot piping supports. Nickel holds off carburisation from hydrocarbon streams while the chromium film blocks oxidation, and the spacer keeps its section where plain stainless thins out.
Power stations level superheater mounts and align header supports with Nickel Alloy 800 shims. Creep resistance comes from the austenitic matrix, which carries sustained load in hot flue gas, so alignment packs stay put between outages.
Furnace builders pack Incoloy 800 shim stock behind burner mounts, muffle joints, and radiant-tube fixtures. The grade shrugs off oxidising atmospheres in continuous heat, and its soft annealed condition lets a shim conform to curved casings during assembly.
Export orders supplied from Mumbai and Taloja in wooden cases or on pallets, sea-ready.
| 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 on request |
Incoloy 800 Shims price in India is around ₹1,350 to ₹2,000 per kg, roughly $14 to $21 per kg for export buyers. Precision-slit shim stock carries a premium over plain coil, and thickness, width, finish, and quantity all move the figure. The range can vary and tracks nickel rates, so call or WhatsApp us for today's price.
We slit Incoloy 800 shims from 0.03 mm to 5 mm thick and to any width between 3 mm and 2000 mm, held to ±0.1 mm. Gauge, width, finish, and edge follow your specification.
The main difference between Incoloy 800 and 800H shims is carbon control. Incoloy 800 (UNS N08800) holds carbon to 0.10% maximum, while 800H (UNS N08810) keeps carbon between 0.05 and 0.10% with a controlled grain size for higher creep strength above 600 °C. Our shims are supplied as base grade Incoloy 800.
Incoloy 800 shims are covered by ASTM B409 / ASME SB-409, the specification for nickel-iron-chromium alloy plate, sheet, and strip. Material ships annealed with EN 10204 Type 3.1 / 3.2 certificates on request.
Some of the surface finishes we offer on Alloy 800 shims are BA, 2B, and Matte. Deburred or round edges suit gasket and instrument work where a raw slit edge is not suitable.
You can source Incoloy 800 shims in India from us at Riddhi Siddhi Impex. Our Mumbai warehouse holds Alloy 800 shim stock ready for dispatch. As a manufacturer, stockist, and exporter since 2002, we serve buyers across India and ship overseas. Call or WhatsApp us; quotes will be provided within 24 hours.
