We are Riddhi Siddhi Impex, an ISO 9001, ISO 14001, and ISO 45001-certified Inconel Shims manufacturer and supplier from Mumbai since 2002. Seven Inconel grades run across our slitting lines, fabricated to ASTM, ASME, and AMS standards and custom cut to any width from 3 mm to 2000 mm. We hold a monthly supply capacity of 400 to 500 tonnes and 4 to 5 days of dispatch, keeping shutdown and assembly schedules intact.
Inconel shims set alignment and fill assembly gaps at joints where heat and corrosion would destroy an ordinary spacer. Millwrights use them under turbine casings, between exhaust flanges, and behind furnace fixture mounts, positions where carbon steel scales away and standard stainless softens. The nickel-chromium base of the Inconel family grows a stable oxide skin instead, so the shim keeps the thickness it was measured to. A packing piece that thins in service gives up the clearance it was set to preserve, and the assembly drifts out of true long before the next inspection catches it. Buyers also refer to the same product as nickel alloy shims, superalloy shims, or Inconel shim stock.
Fabrication happens in-house. We slit every order from source coil stored at our Mumbai and Taloja warehouses, working shim stock from 0.03 mm to 5 mm thick across all seven grades. Material ships soft annealed as standard, with deburred or round edge conditioning offered beside the regular slit edge. Each consignment carries mill documentation traceable to the source heat.
Seven grades come under the Inconel shim line, and the temperature, chemistry, and clamping load at the joint decide among them.
Oxidation and chloride stress corrosion cracking meet their match in Inconel 600 Shims, cut from UNS N06600 nickel-chromium-iron stock that serves as the general-purpose grade of the family.
View gradeFurnace builders specify Inconel 602 Shims, produced from Alloy 602 CA (UNS N06025), because the high-carbon nickel-chromium-iron chemistry with aluminium provides oxidation resistance through repeated thermal cycling.
View gradeUNS N06625 pairs corrosion resistance with high strength through its nickel-chromium-molybdenum-niobium chemistry, and Inconel 625 Shims carry both qualities into chemical and marine joints.
View gradeInconel 718 shims, made from UNS N07718, handle the highest clamping loads due to age-hardening heat treatment, so aerospace prefers them.
View gradeIncoloy 800 shims from UNS N08800 support furnace and heater joints, resisting oxidation, carburisation, and moderate sulfur at elevated temperatures.
View gradeIncoloy 825 shims from UNS N08825 secure chemical and offshore joints, resisting sulfuric and phosphoric acids, chlorides, and sour service attack.
View gradeIncoloy 840 shims stabilise exhaust, heater, and radiant tube supports, providing oxidation and scaling resistance in continuous high-temperature flue environments.
View gradeAerospace, chemical processing, and heat treatment commonly use the Inconel Alloy shims we dispatch. Grade selection follows the conditions at the joint.
Engine builders shim casing splits, gearbox mounts, and accessory brackets with Inconel 718 Shims, whose age-hardened strength holds clamping preload at operating temperature. Exhaust and nozzle sections lean on Inconel 625 Shims instead, trading peak strength for weldability and fatigue performance. Foil-gauge material from the same coil sets fine clearances during assembly.
Process plants pack Inconel 625 Shims below pump baseplates, around reactor supports, and across column flanges where acid vapour and chlorides consume lesser spacers. Inconel 600 Shims cover caustic service and the chloride stress corrosion cracking territory that cracks ordinary austenitic stainless steel. A single store carrying both grades handles most corrosive joints on a site.
Furnace fabricators fit Inconel 602 Shims behind fixture mounts, retort flanges, and burner assemblies, where the alumina-forming chemistry survives thermal cycling that scales other nickel grades. Inconel 600 Shims handle the moderate zones around door frames and conveyor supports. Both keep their fitted thickness through heat-up and cool-down, so alignment lasts between rebuilds.
Riddhi Siddhi Impex holds three ISO certifications, and quality paperwork accompanies every shipment we make.
An EN 10204 Type 3.1 mill test certificate accompanies each consignment, recording chemistry and test results for the heat. We arrange Type 3.2 on request.
ISO 9001:2015 certifies our quality management system, covering coil intake, slitting, inspection, and dispatch.
Environmental management at both warehouses runs to ISO 14001:2015, from material storage through processing and movement.
ISO 45001:2018 sets the occupational health and safety framework for our slitting lines and handling operations.
Inconel shims fall under HS heading 7506, which covers nickel plates, sheets, strip, and foil. Since Inconel is a nickel alloy, subheading 7506.20 for alloyed nickel applies. Ask your customs broker to confirm the final classification.
Yes, Inconel shim stays on hand at our Mumbai and Taloja warehouses year-round. Standard orders dispatch in 4 to 5 days. Urgent ones leave in 2 to 3 days.
Yes. We cut each order to requirement, working thicknesses from 0.03 mm to 5 mm and any width from 3 mm to 2000 mm at ±0.1 mm, with deburred and round edge options available.
You can buy Inconel shims from Riddhi Siddhi Impex, which has made and stocked them in Mumbai since 2002 for buyers across India and abroad. Call or WhatsApp us, and your quote will arrive within 24 hours.
