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Laser Welding Thick Steel

Handheld laser welding machine mainly consists of laser, welding system, handheld laser gun and cooling system. It adopts an integrated structure design, multiple welding swing modes, and the swing width can be adjusted within the range of 0~8MM to ensure the consistency of the welding effect. It has the advantages of fast welding speed, high strength, large depth, small deformation, narrow weld seam, small heat affected zone, small workpiece deformation, less subsequent processing workload, less manual output, high flexibility and safety.
Product Model: ST-FW1500H/ST-FW2000H/ST-FW3000H
Laser power: 1500W/2000W/3000W
Single maximum welding thickness: 0.5-8mm

Details        Product Parameters        Samples       Video

laser welding thick steel features-Suntop

Features of laser welding thick steel

1. Infrared positioning is utilized for calibrating and verifying the welding position in the welding process, resulting in increased accuracy and a more aesthetically pleasing welding seam.

2. The beam quality is excellent, allowing for precise control and creating fine weld joints. It has a small focusing spot, enabling high-precision positioning and facilitating automation.

3. The wire feeder features a high-precision touch capacitive screen, operates on 220V, and provides automatic wire feed. It offers a more powerful wire feed and prevents wire jamming.

4. Our self-developed handheld welding head is equipped with various safety alarm devices, ensuring easy and flexible operation.

5. We offer a range of welding copper nozzles to cater to different needs, including external welding, internal welding, right angle welding, narrow edge welding, and large spot welding. Customers can select the appropriate welding copper nozzle for their specific requirements.

6. Suntop's patented technology includes a water circulation protection system and auxiliary gas detection, effectively prolonging the lifespan of the laser lens and preventing damage to optical components caused by improper operation.

Details of laser welding thick steel

1. Laser welding head

Light weight only 0.8KG, flexible and convenient to weld any shape of metal parts, adjustable welding seam width, can carry out 10 meters long distance welding. Equipped with safety temperature monitoring system.

2. Operation interface

Multi-language intelligent control panel, flexible adjustment of welding parameters, multi-group welding parameter library, light output cumulative timing, etc.

3. Automatic wire feeding system

Touch screen design, automatic wire filling, fully digital design, supporting stainless steel and aluminum wire of 0.8mm, 1.0mm, 1.2mm, 1.6mm, 2.0mm diameter.

4. Laser Source

We use customized fiber with minimum core diameter of 20um for deeper penetration, laser life up to 100,000 hours, maintenance-free, with Bluetooth capability.

5. Water Cooler

Double circulation water cooling makes the laser source and weld head cooler, temperature control sensor adopts imported brand.

6. Welding connection fiber

10 meters long fiber optic cable built-in design, effectively avoid damage to the fiber and the problems caused by moisture, greatly improving the service life of the laser device.

laser welding thick steel detail-Suntop

Advantages of laser welding thick steel

1. Flexible and convenient, one-piece design, the laser, water tank, and control part are combined together, occupying a small area and requiring low site requirements. It is equipped with moving pulleys, and the work position can be adjusted at any time according to site requirements, making it convenient and flexible.

2. The operation is simple and easy to learn, with no technical threshold required. Ordinary workers can operate it after short-term training and easily achieve high-quality welding results.

3. The welding heat-affected zone is small, the yellowing and blackening areas on both sides of the weld are small, and the overall deformation of the workpiece is small; the heap height of the welding surface is small, and secondary grinding is not required, reducing labor and time costs.

4. A variety of welding methods can be used to achieve any angle welding, cladding welding, butt welding, vertical welding, flat fillet welding, internal fillet welding, external fillet welding, etc., and can be used for various workpieces with complex welds and large irregular-shaped workpieces. welding.

5. Concentrated energy, small heat-affected zone, no deformation, no blackening, large welding depth, fine and beautiful welds, firm welding, and the strength of the welds reaches or even exceeds the strength of the base material itself.

6. The use and maintenance costs are low, the electro-optical conversion efficiency is as high as over 30%, the lifespan is more than 100,000 hours, and it is basically maintenance-free.

Single side weld thickness

Maximum melting




Stainless steel   (mm)




Mild steel (mm)




Aluminum (mm)




Brass/copper (mm)




Galvanized sheet   (mm)




Iron (mm)




Remark: Double weld thickness can be achieved if the material is welded from both sides in two times.

Other optional functions

Cleaning function

By replacing the laser nozzle and cleaning lens, the material surface cleaning function can be achieved, effectively removing rust, oxide layers, oil stains, etc. from the material surface without damaging its characteristics. It has the characteristic of non-contact and does not require cleaning solution, which can replace professional cleaning equipment.

laser welding thick steel cleaning-Suntop

Cutting function

It can perform simple cutting, and welding and cutting can be freely switched by simply changing the welding copper nozzle to the cutting copper nozzle, which is very convenient.

It can cut metal sheets such as stainless steel, carbon steel, aluminum, aluminum alloy, and iron, with a maximum cutting thickness of about 2mm.

laser welding thick steel cutting-Suntop

Welding seam cleaning function

It can effectively remove impurities such as oxides, welding slag, oil stains, and dust generated during the welding process, making the weld surface clean. This not only helps improve the quality of the weld, but also enhances the strength and appearance of the weld. Laser cleaning has high precision and controllability, and can thoroughly clean the weld surface without damaging the base material.

laser welding thick steel welding seam cleaning-Suntop

Welding method

A wide range of welding methods are available for welding at any angle, including overlay, butt, vertical, fillet, internal, external, etc. These methods can be used for a variety of workpieces, including complex welds and irregularly shaped workpieces, especially larger ones. These methods can be used to weld a wide variety of workpieces, including complex weld seams and irregularly shaped workpieces, especially larger workpieces.

laser welding thick steel welding method-Suntop

Application materials

It can be used for welding stainless steel, carbon steel, copper, aluminum, gold, chromium, silver, titanium, nickel and other metals or alloys. It can also be used for various welding between different materials, including copper – brass, titanium-molybdenum, titanium- gold, nickel-copper, etc.

Application industry

Widely used in sheet metal processing, chassis, water tanks, distribution boxes and other cabinets, door and window guardrails, advertising signs, battery components, steel furniture, electronic appliances, metal molds, auto parts, instruments, mobile communications, medical equipment and other industries.

Parameters of laser welding thick steel









Welding   gun weight




Max.   welding thickness (mm)




Max.   welding seam width (mm)




Laser type

Fiber laser   (Suntop custom 20um welding exclusive)

Laser detection method

Bluetooth wireless   connection, Mobile App Monitoring

Control panel language support

English,   Spanish, German, French, Turkish, Italian, Russian,

Vietnamese, Thai, Korean, Japanese, etc.

Laser wavelength (nm)


Suitable welding materials

Carbon   steel, stainless steel, aluminum, galvanized sheet metal,

brass, iron and other metal materials

Adapted welding methods

Spot   welding, overlap welding, splice welding, fillet welding,

lap welding etc.

Laser power adjustment range (%)


Cooling method

Advanced   water-cooling, dual temperature control and automatic


Welding aiming preview method

Built-in Red-Light pointer

Protection systems

Air pressure sensor and solenoid valve   control

Length of fiber optic cable (meter)

Standard 10 (can be customized 15)

Welding shielding gas

Argon or nitrogen (air pressure approx. 6-8   bar)

Working environment

Temperature 5-45 °C /humidity 10-90%

Other   optional support functions

Cleaning   + cutting

Cleaning   + cutting

Cleaning   + cutting + weld bead cleaning

Max.   Cutting thickness (mm)




Max. cleaning width (mm)




Automatic wire   feeder type

(Universal   with TIG wire)

Single wire feed

Single wire feed

Support both the double wire feed and single wire feed

Solid wire type (SS, Iron, AL, Brass)

0.8, 1.0, 1.2, 1.6

0.8, 1.0, 1.2, 1.6

0.8, 1.0, 1.2, 1.6, 2.0, 2.5

Temperature control monitoring alarm




Main machine consumables

Laser protective lenes, welding nozzles, welding wires

Machine size (MM)




Machine net weight (KG)




Power supply requirement

110V / 220V±10%, single phase

380V±10%, three phase

Total power consumption (Maximum)




laser welding thick steel samples-Suntop





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