Laser cutting Aluminum

Laser cutting aluminum – precise, burr-free, and efficient

Aluminum impresses with its low weight and excellent workability – ideal for applications in aerospace, automotive engineering, and numerous other industries. With our process for laser cutting aluminum from 0.01 to 3.0 mm, even complex geometries can be realized precisely, efficiently, and with virtually no distortion. Thanks to minimal heat input, the material is protected and remains dimensionally stable—a clear advantage for thin sheets and sensitive components.

LaserJob relies on state-of-the-art laser technology and years of experience to cut aluminum with precision—with fine profiles, burr-free edges, and perfect repeatability. Whether for single pieces or series production, our customers benefit from fast processing times, minimal post-processing, and consistently high quality.

LaserJob – Your partner for precise aluminum laser cutting.

Your experts for laser cutting

Precise CAD data: Experienced colleagues convert your drawing or sketch into CAD format. We manufacture optimizedto the tolerance center.

The perfect combination of machine and manual work: CNC-controlled laser cutting systems implement CAD data with µm precision. And yet, often only manual intervention in the cutting sequence can achieve the perfect result.

Technical understanding of your project: To manufacture your workpiece in the best possible way, we first record all technical requirements and try to understand its intended use precisely. This allows us not only to manufacture with precision, but also to provide you with specific advice and, if necessary, make suggestions for optimization.

Optimized cutting parameters: Minimal edge roughness is achieved through a combination of precise focusing, optimal cutting parameters, and dynamic beam shaping, based on many years of in-depth industry experience.

High-quality optics and machine precision: Our high-quality laser cutting machines with precise control of optics and cutting parameters contribute significantly to edge quality.

Material and thickness adjustment: Choosing the right material and using thinner materials in combination with optimally adjusted parameters results in lower roughness. With thicker materials, precise coordination of laser power and cutting speed is crucial for component quality.

Minimal heat-affected zone: The combination of a small focus diameter and cutting speeds reduces thermal stresses on the material, thereby minimizing material warpage.

Dynamic power control: Our modern fiber lasers adjust power in real time through pulse modulation and beam shaping. For thin materials, the energy supply is precisely controlled to minimize heat input. Depending on the material type and thickness, these technologies achieve tolerances of ±0.005 mm even with complex geometries, such as those used in aerospace or medical technology.

Excellent reproducibility: Thanks to CNC control and automation, modern laser cutting systems cut every part with extremely high precision and repeat accuracy. Computer-aided control ensures that even in large series, every workpiece is practically identical.

High cost-effectiveness: Laser cutting is fast, enables short setup times, and allows tool-free switching between different designs. This saves time and money, especially with varying or small batch sizes.

Minimal post-processing: High cutting quality and clean edges significantly reduce stress on the material, leading to lower post-processing effort and cost.

Our technologies

LaserJob utilizes advanced technologies and innovative processes to achieve maximum precision and efficiency in laser cutting aluminum. Our method blends technical excellence with customized solutions designed specifically for your needs.

Our production

Our manufacturing conditions – precision and perfection

Climate-controlled production environment: Consistent temperatures ensure maximum precision and process reliability.
Versatile cutting areas: By expanding the cutting areas to 600 x 2000 mm and 1000 x 1000 mm, we can implement even more of your ideas. We specialize in material thicknesses from 10 µm to 3.0 mm.
In-house designed production machines: Our production machines were designed in-house to enhance the capabilities of conventional standard machines. When combined with proven laser technology from renowned manufacturers such as Trumpf and Alphalaser, we achieve powerful systems with unique production capabilities.
Versatile machines: 20 production machines enable both optimal production variants for each project and a wide range of services (laser cutting, laser welding, laser engraving, but also micro-bending and small-scale machining processes such as turning, milling, or countersinking).
In-house design and data preparation: Project-oriented and personal support from in-house experts.
Extensive material warehouse: Fast response times and high flexibility thanks to on-site warehousing and short links to renowned suppliers.
Redundant manufacturing systems: Consistent and timely delivery capacity through the use of multiple machines operating simultaneously.

With state-of-the-art technology and strict quality standards, we create solutions that meet the highest requirements—both now and in the future.

Material: Aluminum

In general, all common aluminum alloys can be laser cut; however, the cut quality and speed vary depending on the alloy composition. We are ready to produce aluminum sheet cuts in thicknesses ranging from 0.1 to 3.0 mm for you.

AlMg3 / EN AW-5754

Advantages: High corrosion resistance, good weldability, and mechanical strength.
Application: Automotive engineering, shipbuilding, and design applications, as they are easy to anodize.

AlMgSi1 / EN AW-6082

Advantages: Medium tensile strength, good corrosion resistance, and machinability.
Applications: Offshore industry, vehicle construction, and food technology.

AlMg1SiCu / EN AW-6061

Advantages: Balance of strength, corrosion resistance, and moldability.
Applications: Aviation, mechanical engineering, and structural components.

Al 99,5 / EN AW-1050 (pure aluminum)

Advantages: Excellent formability and smooth cut edges.
Application: Simple constructions, drilling templates, and decorative parts.

The selection of alloy should be based on the desired strength, surface quality, and application. Magnesium-containing alloys (e.g., EN AW-5754) offer the best combination of machinability and mechanical strength. We would be pleased to assist you in choosing the right alloy.

Why choose LaserJob?

high accuracy

You can rely on our passion for precision: we meet your requirements with millimeter accuracy.

no matter the quantity

We create products with precision, whether it's a single piece or a series, perfectly suited for prototypes and custom-made solutions.

direct contact

Your benefit: We take care of your request personally—quickly, skillfully, reliably, and we're only happy when you are.

quick delivery

Benefit from our fast delivery times—thanks to our flexible service, even urgent projects always stay on schedule.

Your ideas, our expertise

Let's get your project started!

The fastest way to reach our order colleagues is by email at mail@laserjob.de or by calling us directly during our business hours.

This enables us to process your request efficiently and promptly. Find your personal contact person here.

When it comes to material processing, it is almost impossible to give general delivery time estimates. Requirements and projects vary too greatly. Please contact us directly to discuss how quickly we can deliver to you.

LaserJob keeps an extensive stock of AlMg3 sheets ready for you to meet your requirements in terms of quality and fast delivery. Material test certificates are available on request.

Aluminum is available from stock or at short notice in the following material thicknesses.

AlMg3 - EN AW 5754 - 3.3535	AL 99,0 - EN AW 1200 - 3.0205
0,3 mm	0,05 mm
0,5 mm	0,07 mm
1,0 mm	0,1 mm
1,2 mm	0,15 mm
1,5 mm	0,2 mm
2,0 mm
3,0 mm

We support a wide range of file formats:

DXF, DWG, IGES/step, and all common 2D and 3D formats can be processed directly.

Image files such as JPEG and TIFF, as well as Photoshop documents, can also be implemented. We can even create exact cutting commands for our lasers from your drawings, whether they are precise designs or spontaneous hand sketches.

Our precise cutting technology enables us to deliver components with minimal or no burrs as standard. The following post-processing methods are available for special requirements:

Brushing
We use a CNC-controlled brushing process to remove burrs on the laser exit side. The brush head moves in a meandering pattern in four directions across the surface to ensure uniform processing.
Polishing and Manual Deburring (Grinding)
For delicate parts with a material thickness of less than 0.2 mm, we recommend manual deburring. This method ensures maximum precision and protects sensitive workpieces.
Vibratory finishing (barrel finishing)
This process is suitable for parts with a material thickness of 0.5 mm or more and a maximum size of 50 x 50 mm. In drums with a capacity of 5 or 10 liters, the workpieces are processed by friction with abrasive media, which rounds off edges and improves surface quality.

Through our extended workbench, we can offer you a wide range of surface treatments, such as:

Technical surface treatments

Electroplating
Passivation
Black oxide finish
Gilding
Sandblasting
Electropolishing
Anodic treatment

Machining

Turning
Milling
Countersinking
Bending
Grinding
Grating and other machining operations

Standard tolerances in the field of laser cutting are specified and manufactured in compliance with ISO 2768f. Even smaller tolerances are always determined by the material, material thickness, and contour.

These tolerances can be warranted based on experience:

±5 µm up to 50 µm material thickness
±10 µm up to 100 µm material thickness
±20 µm up to 600 µm material thickness
±50 µm up to >600 µm material thickness

with a positioning accuracy of ±10 µm.

Additionally, we offer the option to measure the cut parts and document them in an initial sample test report, a CoC certificate, or a test report.

We can also accommodate smaller tolerances if required. Please contact us for more information.

Any questions? Feel free to contact us directly— Your personal contact looks forward to your call:

Online inquiry

Robert MassenhauserSales Laser material processing

+49 (0) 8141 52778 - 25 r.massenhauser@laserjob.de

Are you encountering difficulties?

Let us advice you!

FAQ: Frequently asked questions

The high thermal conductivity of aluminum

(approx. 205–235 W/(m·K)) has a significant influence on the cutting quality during laser cutting. Since aluminum dissipates heat very quickly from the cutting area, the laser energy applied is rapidly distributed throughout the material. This means that less energy is available for the melting and cutting process, which can impair the cutting quality, especially with thicker sheets.

In detail, this means the following:

Wider heat-affected zone: Rapid heat dissipation can result in a wider heat-affected zone (HAZ), which can reduce the precision of the cut and the quality of the cut edge.
Higher energy requirements: To achieve clean cuts, it is often necessary to work with higher laser power or lower cutting speeds so that sufficient energy remains in the cutting area.
Potential burr formation and distortion: Due to the high thermal conductivity, uneven heating and thus burr formation or warping of the workpiece may occur, especially with complex geometries or thin sheets.

Modern laser technologies, like our fiber lasers, are designed to overcome these challenges and deliver high cutting quality even with aluminum. Nevertheless, heat conduction remains a key factor that must be taken into account when configuring the process and selecting parameters.

Aluminum

is available in numerous alloys, each with different properties. Pure aluminum extracted from bauxite is combined with small amounts of elements such as magnesium, manganese, copper, silicon, or zinc, depending on the desired application. This targeted addition creates alloys that blend the positive properties of the respective elements. For example, aluminum, which is already lightweight, can be further hardened and better protected against corrosion or high temperatures. Essentially, almost all aluminum alloys are suitable for laser cutting. However, the alloys differ in terms of their material properties, which in turn influence the cutting quality, cutting speed, and challenges involved in cutting.

An overview of the most important alloying elements and their properties:

Magnesium: Increases strength and corrosion resistance, especially relevant for shipbuilding and vehicle construction.
Manganese: Improves moldability and thermal conductivity, often used for cookware and vehicle parts.
Copper: Increases strength but reduces corrosion resistance; hence, it is often used in aircraft construction.
Silicon: Lowers the melting point and improves castability, important for foundry parts and welding applications.
Zinc: Provides substantial tensile strength, typically for heavy-duty components in the aerospace industry.

Appropriate selection of aluminum alloy is made based on the requirements for strength, machinability, corrosion protection, and other specific properties.

Precision and accuracy

Despite the challenges, laser cutting aluminum offers significant advantages when used correctly. The accuracy of aluminum laser cutting is approximately ±0.1 mm with a dispersion of ±0.3 mm, which enables high precision for custom laser cuts that fit perfectly. This precision makes laser cutting ideal for complex shapes and fine details.

Quality of cut surfaces

Laser cutting of aluminum produces smooth, burr-free edges that do not require post-processing such as grinding. This saves production time and costs. The low thermal deformation of the material, as the laser concentrates the heat on a small area, also preserves the mechanical and structural properties of the aluminum.

Efficiency and flexibility

Laser cutting of aluminum is characterized by high efficiency and speed. This shortens production time and optimizes series manufacturing. In addition, the technology enables the processing of different aluminum thicknesses with high cutting quality, from very thin to thicker sheets.

The special properties of aluminum with laser cutting

Aluminum poses particular challenges for laser cutting, requiring specific technological adjustments. The unique physical properties of this light metal—in particular its high reflectivity, low melting temperature, and excellent thermal conductivity—have a significant impact on the laser cutting process. These factors require specialized laser systems and adapted process techniques to achieve precise, high-quality cuts.

?Physical properties of aluminum and their influence on laser cutting?

High reflectivity as a key challenge

The highly reflective surface of aluminum poses one of the greatest challenges in laser cutting. The metal reflects a significant portion of the laser energy, which makes effective material processing difficult. Up to a wavelength of approximately 330 nm, aluminum even has a higher reflectivity than silver and also reflects ultraviolet radiation. As a result, a significant portion of the laser beam is reflected instead of penetrating the material. The reflection of the laser beam also poses risks for the laser cutting system itself. In conventional laser systems, this reflection can lead to process instability, disruptive shutdowns, or even damage to the laser. Therefore, aluminum laser cutting requires special lasers with anti-reflection protection that can operate without instability or damage despite the extreme reflection.

Low melting point and thermal properties

Aluminum has a significantly lower melting point than other metals, such as iron (1538°C) or copper (1084.6°C), at 660.4°C. This property requires adjusted cutting parameters to prevent overheating and unwanted thermal effects. The low melting point, combined with the comparatively high coefficient of thermal expansion, causes aluminum to expand more under the influence of heat, which can affect cutting precision.

Excellent thermal conductivity

Aluminum has a high thermal conductivity of 235 W/(m·K). By comparison, copper has a value of 400 W/(m·K) and silver even 429 W/(m·K). This excellent thermal conductivity, although lower than that of copper or silver, means that the heat generated by the laser is quickly distributed throughout the material rather than remaining concentrated at the cutting point. This complicates the local melting and vaporization process and requires a higher energy input to achieve an effective cut.

Technical challenges in aluminum laser cutting

Energy absorption problems due to reflection

The main difficulty in laser cutting aluminum is the effective transfer of energy from the laser beam to the material. ?Engraving? aluminum with a laser cutting machine is made considerably more difficult by its high reflectivity, as it is difficult for the plasma equipment to cut through the material effectively. The reflective nature of aluminum means that a considerable portion of the laser energy does not contribute to cutting, but is reflected back.

Thermal conductivity and material behavior

The high thermal conductivity of aluminum means that the heat generated by the laser is quickly distributed throughout the material, making the cutting process less efficient. The rapid heat distribution makes it difficult to maintain the temperature required for slicing at the cutting point. In addition, the low melting point combined with good thermal conductivity means that the material behaves differently during cutting than other materials like steel or stainless steel.

Special laser technologies and processes for aluminum

Optimal laser systems for aluminum processing

Not all types of lasers are equally suitable for cutting aluminum. Fiber lasers and Nd:YAG lasers have proven to be particularly effective, as their wavelength is better absorbed by aluminum than that of CO2 lasers. Modern fiber lasers offer high quality and process efficiency, making them the ideal choice for cutting aluminum. Lasers with shorter wavelengths are often used to overcome the reflection problem. These have a higher energy level and can penetrate the surface of aluminum more effectively. This makes aluminum processing more efficient and precise.

Innovative process engineering

The sublimation cutting process is often used for laser cutting aluminum up to 4 mm thick. In contrast to cutting by laser burning or laser melting, this process offers particular advantages when processing aluminum. The modulation frequencies of the laser can be individually varied between 500 and 50,000 Hz, resulting in perfect cut quality with slag-free cut edge.

Functional technology for unique material requirements

Due to the special material properties of aluminum—high reflectivity, low melting point, and good thermal conductivity—laser cutting requires specialized laser systems and customized processes. However, with the right technologies, it is possible to achieve precise, high-quality cuts that are suitable for a wide range of industrial applications. The development of innovative lasers with anti-reflection protection and the application of special process techniques have made laser cutting one of the preferred methods for aluminum processing, used in aerospace engineering, architectural design, and many other industries.

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[Translate to Englisch:] Ein runder schwarzer Schalterring, laserbeschriftet in sehr sauberem Farbabtrag in Weiß mit den Worten "Sport, Pfeilsymbolen und Green"

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