Exothermic Welding Manufacturer · India
Amiable Impex manufactures the complete exothermic welding system — weld metal, semi-permanent graphite moulds and site-ready kits — for permanent earthing, railway and substation connections.
Built by experience
Precision at every connection.
About Amiable Impex
We engineer exothermic welding systems for permanent, dependable connections. From precisely blended weld powder to graphite moulds and complete field kits, every product is developed with one purpose — performance that lasts for decades.
Indian manufacturing discipline, backed by focused R&D and trusted across critical infrastructure worldwide.
Product portfolio
01
Weld metal & starting powder
Precision-blended copper oxide and aluminium weld metal, paired with starting powder for clean, dependable ignition on every shot.
02
Semi-permanent graphite moulds
Graphite moulds for cable, rod, bar and surface connections — engineered for precise, repeatable joint geometry.
03
Every connection type
Cable-to-cable, cable-to-rod, rod-to-steel, tape, strip and rebar joints for every earthing and bonding layout.
04
Site-ready welding kits
Everything a crew needs on site — complete, matched and field-tested, so every weld is right first time.
Need a specific mould or conductor size?
Tell us your conductors and joint type — we’ll match the right mould and weld metal.
Talk to an engineerJoint library
Explore eight of our most-specified cable, rod, bar and steel-surface connections — engineered for clean, repeatable welds.
The technology
Exothermic welding is a self-contained process that permanently joins conductors — such as copper to copper or copper to steel — using the heat of a chemical reaction. Powdered copper oxide and aluminium react inside a graphite mould, producing molten copper that fuses the conductors into one molecular connection.
Also called exothermic bonding, it is the preferred technique wherever high-integrity electrical connections and grounding are critical — and because the reaction generates all its own energy, it needs no auxiliary power or heat source.
The reaction
3CuO + 2Al → 3Cu + Al2O3 + heat
Copper oxide is reduced by aluminium. Molten copper forms the weld; the lighter aluminium-oxide slag rises and is removed.
Precision in every stage
Six controlled stages transform carefully prepared materials into a permanent molecular connection — without external power and with repeatable, site-ready precision.
The surfaces of the alloy to be welded — such as copper or copper alloy — are cleaned to remove oxidation and debris, ensuring optimal bonding during the welding procedure.
A precision graphite mold shapes the fused metal during the welding procedure and withstands the intense heat generated by the reaction.
A measured charge of exothermic weld powder — a blend of powdered copper oxide and aluminum — is placed into the mold to produce the heat required for welding.
A small starting reactant initiates the exothermic reaction, releasing the energy needed to activate the weld.
Molten metal flows through the mold and fills the cavity, joining the metals with a molecular bond as strong as the base materials.
The completed weld cools and solidifies into a permanent, durable connection engineered to withstand harsh service conditions.
Inside the graphite mould
The mould is the heart of every exothermic weld — built to endure intense heat, contain the reaction precisely and perform across multiple welds. Tap a point to explore each component.
Component 01 / 08
The upper chamber of the mould. It holds the weld metal and starting powder, and is where the exothermic reaction begins.
Advantages
Five practical advantages behind permanent, low-resistance connections in critical electrical infrastructure.
The reaction is completely self-sustaining — no electricity, generator or external heat. Ideal for remote sites and live installations.
A molecular bond as strong as the parent conductor, built to carry high currents without loosening, corroding or working free.
Joints withstand repeated fault currents and extreme heat in railway, metal-industry and substation environments.
A fast, controlled reaction contained entirely within the graphite mould — no open arc and no external power on site.
Corrosion-resistant welds that keep resistance low and stable for the full life of the installation.
Manufacturing operations
Controlled thermal processing and precision batching help an exothermic welding manufacturer deliver predictable reaction behaviour, dependable weld integrity and consistent output from one production batch to the next.
The rotary kiln provides uniform, high-temperature processing for metal compounds used in thermite and exothermic welding materials. Its controlled rotation distributes heat consistently, supporting repeatable material preparation and stable weld performance.
Automatic batching measures and dispenses aluminium and selected metal-oxide components in defined proportions. This precision limits formulation variation and supports consistent reaction energy, structural integrity and reliable field results.
In-house quality assurance
Physical, mechanical, metallurgical and chemical testing provides clear evidence of material consistency, weld strength and long-term performance before products reach the field.
Physical test · Non-destructive inspection
High-frequency sound waves help identify hidden discontinuities inside thermite-welded rail and metal connections without damaging the joint. USFD supports safer inspection, quality verification and dependable rail infrastructure.
01Brinell Hardness Machine
Mechanical · 3000 kg test
01Applies a 3000 kg test force to measure weld-metal hardness — critical data for performance under heat and load.
02Transverse Testing Machine
Mechanical · 200 T test
02With a minimum capacity of 200 tonnes, it proves welded joints withstand heavy transverse loads in rail infrastructure.
03Spectrometer
Metallurgical test
03Precise chemical analysis of joint metal confirms each weld has the composition needed for high-stress, long-life service.
04Microscope Test
Metallurgical test
04Microstructure, grain size and grain boundaries are examined to verify weld strength, consistency and freedom from defects.
05Carbon Sulphur Determination
Chemical test
05High-temperature combustion analysis measures carbon and sulphur content to confirm raw-material purity.
06Water Distillation Plant
Chemical test
06Produces high-purity laboratory water so testing of weld powder is free from any contamination.
07Muffle Furnace
Chemical test
07Controlled high-temperature heating for ashing and heat treatment when evaluating graphite moulds and weld powder.
From formulation to final verification
Explore our manufacturing capabilities or request the complete exothermic welding product catalogue.
Global reach
Export-ready documentation, robust packaging and responsive support put our exothermic welding systems on power, rail and infrastructure projects across six continents.
Why Amiable Impex
Amiable Impex is an India-based exothermic welding manufacturer supplying high-performance exothermic welding powder, graphite molds, accessories and field-ready systems for permanent electrical connections.
Our solutions are engineered for consistent ignition, low-resistance bonding and dependable service across grounding networks, railway track systems and metal-fabrication projects in India and international markets.
One accountable manufacturing partner
Weld powder → graphite mold → accessories → finished joint
More than a decade of experience supports consistent, repeatable exothermic welding results.
Solutions for grounding, rail tracks, substations and metal-fabrication projects.
Tested weld powder and graphite molds support durable, low-resistance connections.
Kits are matched to conductor sizes, joint types and project conditions. View our exothermic welding kit range.
FAQ
Clear answers about exothermic weld powder, graphite molds, joint performance and application requirements.
A process that permanently joins conductors — such as copper to copper or copper to steel — using the heat of a copper oxide and aluminium reaction inside a graphite mould. No external power is needed.
Clean the conductors, set them in a graphite mould, add weld powder, ignite the starting powder with a flint igniter and let the molten copper fuse the joint as it cools.
Copper to copper, copper to steel, copper-bonded ground rods and other conductor combinations, with the right mould and powder size for each pair.
A reusable, heat-resistant mould that holds the conductors and shapes the molten metal precisely — suitable for multiple welds.
A molecular bond cannot loosen or corrode at the interface, carries current equal to the conductor and keeps resistance stable over time.
From our Mumbai headquarters and plants in Maharashtra and Gujarat, we supply customers in 104 countries.
Need a recommendation for your conductor or joint type? Talk to our technical team
Get in touch
Share your conductor sizes, joint types and quantities — our team will recommend the right moulds and weld metal and respond promptly.
Exploring our precision testing tools
Purpose-built testing equipment helps our team verify strength, hardness, composition and laboratory purity with repeatable precision.
01
Mechanical strength
02
Material hardness
03
Chemical composition
04
Laboratory purity
