Can a 4000W air laser welder really penetrate 12mm steel?

Yes, our 4000W air-cooled laser welder is specifically engineered with high energy density to achieve stable and deep penetration, making it fully capable of high-quality welding on 12mm carbon steel plates.

Can welding quality be guaranteed without buying gas?

Yes. The air-cooled system and optimized nozzle design ensure excellent shielding of the weld pool, providing oxidation-free, high-strength welds while significantly reducing the cost and hassle of external gas tanks.

How much money can be saved in a year using an air laser welder?

By eliminating gas consumption and reducing electricity and maintenance costs associated with water-cooled systems, users can typically save thousands of dollars annually in operational expenses.

What are the advantages of Kempson's wire feeding system?

Kempson's intelligent wire feeding system offers precise control and smooth delivery, which is essential for bridging larger gaps in 12mm steel and ensuring a uniform, professional weld bead.

Can the machine work stably in extreme cold or high-heat environments?

Absolutely. Unlike water-cooled welders that risk freezing or overheating, our air-cooled technology uses industrial-grade components designed to maintain stable performance across a wide range of ambient temperatures.

What kind of after-sales service do you provide?

We provide comprehensive support including a full warranty, 24/7 technical guidance, operational training videos, and fast global shipping for any necessary spare parts to ensure your production never stops.

Laser welder for 12mm carbon steelLaser Welder For 12mm Carbon Steel

Challenges in a laser welder for 12mm carbon steel

The laser welder for 12mm carbon steel falls under the category of industrial-grade medium-to-heavy plate welding. Compared to welding thin plates under 3mm, the difficulty increases exponentially. The challenges involved include the following:

Thermal Distortion Control: The high heat required for thick-plate welding can easily cause the plates to warp, resulting in high post-welding straightening costs.
Challenges in Deep Penetration: It is essential to ensure that heat energy reaches the root to avoid lack-of-penetration defects; traditional processes often rely on complex groove preparation.
Challenges of Double-Sided Bead Formation: Without flipping the workpiece, it is extremely difficult to precisely control the pressure in the molten pool to achieve simultaneous bead formation on both sides.
Risk of Cold Cracks: Thick plates cool extremely quickly, causing the joint to harden; under residual stress, this can easily lead to structural cracks.
Filling Large Gaps: Assembly gaps in large workpieces are difficult to avoid, placing extremely high demands on the weld’s coverage width and wire deposition capacity.
Overall Cost Pressure: Traditional welding incurs high gas costs, consumes large amounts of welding wire, and involves significant labor costs associated with frequent gas cylinder changes.

The real challenge in Laser welder for 12mm carbon steel lies in how to ensure full penetration while simultaneously controlling distortion and reducing the costs associated with groove preparation and gas consumables.

laser welder for 12mm Carbon Steel Solutions

Traditional air laser welding is mostly limited to thin plates and feels powerless when facing heavy workpieces. The Kempson KPS-ALW4000 is an industrial deep penetration laser welder（See also: 4000W Air Laser Welding Machine）. That uses 4000W of powerful energy combined with unique deep molten pool technology to overcome the technical challenges of a laser welder for 12mm carbon steel. It can not only weld through but also complete single-sided welding with natural double-sided forming effects, ensuring the connection strength of thick plates remains extremely stable.

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Deep Penetration Technology, 8mm Ultra-wide Weld Forming

This is a professional industrial deep penetration laser welder. It allows the high-energy laser beam to easily reach the root of the plate, achieving an 8mm ultra-wide weld bead. Single-side welding meets industrial standards for double-side forming, with dense welds and high tensile strength.

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Innovative Triple-wire Feeding System

The equipment comes standard with a self-developed stepping four-drive wire feeder, offering strong power and precise delivery. This system supports free switching between single, double, and triple wires without jamming or breaking. It includes a wire straightening function for smooth operation.

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“Black Gold” Anti-spatter Torch

We have upgraded to a multi-vortex anti-spatter black gold welding torch. It uses a specialized anti-spatter nozzle and pipeline design to prevent welding dust and spatter from entering, reducing lens loss. A built-in emergency alarm device sounds in case of abnormalities.

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Cooling System

We customized a 18000W cooling capacity full-copper tube chiller. Combined with a hollowed-out air duct design, it supports the equipment for 24-hour continuous operation in any season, eliminating power attenuation or shutdown caused by overheating.

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Electronic Control

Utilizing the French Schneider electronic control system, it ensures stable current output even in industrial areas where voltage may fluctuate sharply.

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Durability

The chassis is made of a 2 mm-thickened steel plate. The structure is reinforced for anti-collision and equipped with universal wheels at the bottom. The surface undergoes industrial-grade spray treatment for corrosion and fatigue resistance, adapting to power grid environments in mines and steel structure plants.

Laser Welder for 12mm Carbon Steel Enters the Gasless Era

Self-Generated Shielding Gas: Self-developed High-purity Gas Generation System： This air laser welding (gas-free) equipment features a built-in precision gas factory. It utilizes a multi-stage vortex conflict separation and filtration system imported from South Korea to extract and convert inert shielding gas (argon/nitrogen) from the air with a purity of up to 99.99%. During the welding process, the self-produced gas simultaneously isolates oxygen to prevent the weld from oxidizing and turning black. This means you no longer need heavy gas cylinders; simply plug in to start high-quality welding mode.
Cost Efficiency: Save 30,000 RMB in Gas Costs Annually： A traditional 4000W handheld laser welding machine usually requires the continuous consumption of purchased argon gas. Based on an average daily consumption of 1-2 cylinders in the domestic market, daily gas expenses are approximately 100 RMB. After switching to Kempson air laser welding, gas costs drop directly to zero. Long-term operation not only saves the labor cost of moving gas cylinders but also significantly improves production gross margins, making it a hard choice for enterprises to reduce costs and increase efficiency.

Laser Welder For 12mm Carbon Steel/ 4000W

Technical Parameters

Core Item	Technical Specifications	Remarks
Product Model	KPS-ALW4000	4000W Thick Plate Special Model
Laser Power	4000 Watts	Kempson Customized Chip / USA GW Laser
Carbon/Angle Steel Thickness	12mm	South Korea imported vortex separation
Stainless Steel Thickness	11mm	Bright weld bead, secondary wall backup
Magnesium Alloy Thickness	10.5mm	Supporting self-generated gas, aluminum welding doesn’t blacken
Max Penetration	7.5mm	Industrial deep penetration, strength far exceeds traditional welds
Weld Width Range	1.5mm – 8.0mm	Supports wide weld gap filling and stacking
Wire Feeding Mode	Motor four-drive automatic feeding	Supports free switching of single, double, and triple wires
Modified Wire Diameter	Φ0.8 / 1.0 / 1.2 / 1.6 / 2.0	Compatible with various wire specifications
Shielding Gas Type	99.99% Nitrogen-enriched mixture	Self-produced gas, zero consumption of external cylinders
Gas Generation System	South Korean imported vortex separation	High-precision filtration, gas source purification
Control System	French Schneider	Phosphate protection, stable current discharge
Cooling Method	S&A Customized 18000W Chiller	Full copper tube spindle, supports 24-hour continuous work
Total Power Consumption	≤ 3.5kW	High photoelectric conversion rate, energy saving
Working Voltage	380V	Industrial grade
Fiber Length	Standard 10 meters	Meets outdoor and large workpiece distance welding
Weight / Size	≈585kg / 1.2 * 1.3 * 1.3m	Limit thickness, single-side welding, double-side forming

Application Scenarios

The Kempson KPS-ALW4000 thick plate air laser welder is designed for heavy industries with demanding environments, thick plates, and high-strength requirements. Key industrial application scenarios include:

Heavy Engineering Machinery Parts: Boom brackets, support ribs, large arm connectors.

Mining Equipment and Components: Vibrating screen dust removal, crusher shells, pipeline supports.

Steel Structure Workshops and Buildings: Corbel gussets, embedded parts, I-beam connection plates.

Special Container Operations and Box Welding: Body brackets, chassis crossbeams, container corner fittings.

Heavy Truck Architecture and Agricultural Equipment: Truck longitudinal beam reinforcement plates, agricultural hitch devices, trailer axles.

Power and Energy Facilities: Thick plate brackets for power cabinets, energy pipeline supports.

The KPS-ALW4000 is a “thick plate welding artifact.” Its self-produced high-purity shielding gas solves the logistics problem of “difficult cylinder transport” in remote factories. With 4000W of power, it locks in the 12mm carbon steel golden thickness range, making it the best choice to replace traditional low-efficiency welding solutions.

Showcase of Achievements

Conclusion

Kempson specializes in the research, development, manufacturing, sales, and service of laser welding equipment.We remain at the forefront of thick-plate laser welding technology. With an in-house R&D team and extensive industry experience, the company holds over 30 patents and certifications, including ISO 9001, CE, and FDA certifications, and we provide high-performance laser welding equipment. This 4000W air-cooled laser welder, equipped with an independent gas generation unit and backed by a three-year warranty, effectively addresses cost and efficiency challenges in thick-plate welding.