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WHAT IS
THERMIT WELDING

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Evolution of Aluminum Thermite Welding: A Historical Perspective

Aluminum thermite welding, also known as aluminothermic welding or thermit welding, is a specialized welding technique that utilizes a chemical reaction to generate intense heat for joining aluminum components. This article aims to explore the development and evolution of aluminum thermite welding, highlighting key milestones and advancements in this field.

Thermit Welding process

Stp.1 Ensure the rail ends to be welded are clean, free from rust, and properly aligned. The gap size (space between two rails to be welded)shall be 26±2mm.

Welding instructions

Thermit welding materials will be failed with water. All welding materials should be kept away from any moisture in storage, as well as in the welding process.

Storage Instruction

Thermit welding, also known as aluminothermic welding, requires careful handling and storage of its materials to ensure safety and optimal performance.

THERMIT WELDING TECHNOLOGYS

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crucible
01

ONE SHOT CRUCIBLE TECHNOLOGY
long life
01

LONG LIFE CRUCIBLE TECHNOLOGY

Our Markets

Our main markets are in areas such as railway main lines, seaport crane rails, subways, trams, and high-speed railways. Aluminothermic welding plays a crucial role in these fields. No matter the scenario, RMTS welding technology, with its excellent performance, serves as a powerful support for promoting industry development and ensuring operational safety.

Mainline
01

Mainline 
crane-rail
02

Crane Rail 
metro
03

Metro 
seaport
04

Seaport 
high
04

High Speed

Thermit Consumables

Thermit portion, sand mold, luting sand, ignitor are the main consumables for aluminothermic welding. 1 weld, 1 set consumables.
For example, 10km project, 12.5m long rail
Calculation formula: 10000/12.5×2=1600 sets
High-Quality Thermite Welding Powder
01

High-Quality Thermite Welding Powder
Sand Mould Essential for Precision and Stability in Welding Processes
02

Sand Mould Essential for Precision and Stability in Welding Processes
One Shot Crucible Essential for High Precision Thermite Welding
03

One Shot Crucible Essential for High Precision Thermite Welding
Luting Sand for High-Performance Sealing in Welding and Industrial Applications
04

Luting Sand for High-Performance Sealing in Welding and Industrial Applications
High Temperature Ignitor for Reliable Thermite Reaction Initiation
05

High Temperature Ignitor for Reliable Thermite Reaction Initiation
High-Temperature Crucible Cap for Thermit Welding
06

High-Temperature Crucible Cap for Thermit Welding
High-Temperature Slag Tray for Industrial Use
07

High-Temperature Slag Tray for Industrial Use
Precision Mould Clamps for Casting and Welding
08

Precision Mould Clamps for Casting and Welding
Long Life Crucible Stand
09

Long Life Crucible Stand
Industrial-Grade Crucible Lining for High Heat
010

Industrial-Grade Crucible Lining for High Heat
Rail Shearing Machine for High-Precision Rail Cutting
011

Rail Shearing Machine for High-Precision Rail Cutting
High-Precision Electric Rail Cutting Machine
012

High-Precision Electric Rail Cutting Machine
Electric Rail Grinding Machine for Precise Rail Surface Maintenance
013

Electric Rail Grinding Machine for Precise Rail Surface Maintenance
Profile Rail Grinding Machine for High-Precision Rail Surface Maintenance
014

Profile Rail Grinding Machine for High-Precision Rail Surface Maintenance
Internal Combustion Switch Grinding Machine
015

Internal Combustion Switch Grinding Machine
Internal Combustion Rail Cutting Machine
016

Internal Combustion Rail Cutting Machine
High-Performance Hydraulic Actuator
017

High-Performance Hydraulic Actuator
High-Efficiency Hydraulic Cushion Device
018

High-Efficiency Hydraulic Cushion Device
High-Capacity Bidirectional Rail Joint Adjuster
019

High-Capacity Bidirectional Rail Joint Adjuster
High-Performance Hydraulic Straightener
020

High-Performance Hydraulic Straightener
High-Capacity Hydraulic Straightener
021

High-Capacity Hydraulic Straightener
High-Efficiency Multifunctional Rail Pulling Machine
022

High-Efficiency Multifunctional Rail Pulling Machine
High-Performance Portable Internal Combustion Compactor Pickaxe
023

High-Performance Portable Internal Combustion Compactor Pickaxe
Honda GX200 Internal Combustion Flexible Shaft Compactor
024

Honda GX200 Internal Combustion Flexible Shaft Compactor
High-Efficiency Honda GX200 Internal Combustion Double-Headed Bolt Wrench
025

High-Efficiency Honda GX200 Internal Combustion Double-Headed Bolt Wrench
High-Performance Rail Rust Removal Machine
026

High-Performance Rail Rust Removal Machine
Ф13 Drilling Machine for Efficient and Precise Rail Drilling
027

Ф13 Drilling Machine for Efficient and Precise Rail Drilling
High-Efficiency Internal Combustion Drilling Machine
028

High-Efficiency Internal Combustion Drilling Machine
High-Efficiency Hydraulic Rail Tensioning Machine
029

High-Efficiency Hydraulic Rail Tensioning Machine
0102030405

OVER 20 YEARS OF EXPERIENCE

RMTS is a passionate and progressive aluminothermic welding Manufacturing company

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  • since
    1995
    Thermit welding R&D
  • 5500
    ㎡
    Production Area
  • 5
    Research Patents
  • 15
    +
    Exported Countries
  • 780
    +
    Rail Application Case

Recent Projects

We provide high-quality aluminium welding materials (e.g. welding kits, sand moulds, crucibles, etc.) with comprehensive technical support, customised services and strict quality assurance to help our customers achieve reliable welding results.
We provide high-quality aluminium welding materials (e.g. welding kits, sand moulds, crucibles, etc.) with comprehensive technical support, customised services and strict quality assurance to help our customers achieve reliable welding results.
We provide high-quality aluminium welding materials (e.g. welding kits, sand moulds, crucibles, etc.) with comprehensive technical support, customised services and strict quality assurance to help our customers achieve reliable welding results.
We provide high-quality aluminium welding materials (e.g. welding kits, sand moulds, crucibles, etc.) with comprehensive technical support, customised services and strict quality assurance to help our customers achieve reliable welding results.
01020304
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NEWS

NEWS

Newly rail welding measures has developed

Newly rail welding measures has developed
Alstom has launched an aluminium welding line at its rolling stock manufacturing facility in Wrocław.

Alstom has launched an aluminium welding line a...

December 16 2025
R65 Rail-Type Aluminum Thermit Welding Kits Sample Shipped

R65 Rail-Type Aluminum Thermit Welding Kits Sam...

December 10 2025
Aluminothermic Welding Project Strengthens Rail Infrastructure for the Future

Aluminothermic Welding Project Strengthens Rail...

Aluminothermic Welding Project Strengthens Rail Infrastructure for the Future As global rail networks continue to modernize, the demand for safer, stronger, and more efficient track systems is g...
October 14 2025