Technologies
Laser cutting materials guide refers to the specification of which metals, alloys, and gauges can be cut using fiber laser technology, along with their maximum thickness limits, achievable tolerances,
Laser cutting materials guide refers to the specification of which metals, alloys, and gauges can be cut using fiber laser technology, along with their maximum thickness limits, achievable tolerances, and surface finish quality. Understanding material compatibility determines whether a design can be
Laser cutting materials guide refers to the specification of which metals, alloys, and gauges can be cut using fiber laser technology, along with their maximum thickness limits, achievable tolerances, and surface finish quality. Understanding material compatibility determines whether a design can be laser cut cost-effectively or requires alternative processes like plasma or waterjet cutting.
Fiber laser cutting handles mild steel (S235/S355) up to 20 mm, stainless steel (304/316) up to 15 mm, aluminum (6061/5052) up to 12 mm, brass up to 6 mm, galvanized steel up to 4 mm, and copper up to 4 mm. The fiber laser operates at 1,064 nm wavelength, making it three times more efficient on metals than older CO2 systems (10,600 nm), which struggle with reflective metals like aluminum and copper.
At Entag, we cut mild steel to ±0.1 mm positional tolerance per ISO 2768-f (fine) classification, achieving EN ISO 9013 thermal cutting Class 2–3 quality—suitable for structural brackets, enclosures, and precision sheet metal assemblies without secondary finishing. Stainless steel cuts clean edges with minimal oxidation (Ra 1.6–3.2 surface finish), making it ideal for food equipment and medical components. Aluminum cuts require precise assist gas control to prevent thermal distortion; Entag's fiber setup handles 6061 and 5052 grades reliably up to 12 mm.
Laser Cutting Materials: Full Compatibility Chart for Metal Fabrication
| Material | Grade (Egypt Market) | Max Thickness (mm) | Laser Type | Tolerance | Surface Finish (Ra) | Typical Use Case |
|---|---|---|---|---|---|---|
| Mild Steel | S235 / S355 | 20 mm | Fiber | ±0.1 mm | Ra 3.2–6.3 | Structural brackets, enclosures |
| Stainless Steel | 304 / 316 | 15 mm | Fiber | ±0.1 mm | Ra 1.6–3.2 | Food equipment, medical parts |
| Aluminum | 6061 / 5052 | 12 mm | Fiber | ±0.15 mm | Ra 3.2 | Panels, heat sinks, aerospace |
| Brass | C360 | 6 mm | Fiber | ±0.1 mm | Ra 1.6–3.2 | Decorative, electrical components |
| Galvanized Steel | DX51D | 4 mm | Fiber | ±0.2 mm | Ra 3.2–6.3 | HVAC, light fabrication |
| Copper | C101 | 4 mm | Fiber | ±0.15 mm | Ra 3.2 | Electrical, thermal applications |
Note on Reflective Metals: Brass and copper are highly reflective and require fiber laser technology—CO2 systems risk back-reflection damage. Entag's fiber setup handles both safely without secondary tooling costs.
Never laser cut PVC, vinyl, or composite materials containing chlorine—they release toxic chlorine gas. Thick galvanized steel above 4 mm produces harmful zinc fumes that damage equipment and create health hazards. Carbon fiber, fiberglass, and tempered glass are incompatible: carbon fiber and fiberglass release carcinogenic particles, while tempered glass fractures unpredictably. Coated composites and sandwich materials (foam cores) also fail because the laser melts or burns the binder matrix unevenly. Always confirm material composition and coatings before submitting a quote—Entag requires material certification or sample verification for non-standard alloys.
Engineers sourcing parts in Jeddah, Riyadh, and Dammam often face questions about material substitution when their first choice is incompatible; our team helps identify laser-suitable alternatives within your performance requirements.
The answer depends on reflectivity, thermal conductivity, and assist gas interaction. Fiber lasers excel on metals with moderate-to-low reflectivity: mild steel, stainless steel, and their alloys absorb laser energy efficiently. Aluminum and copper are reflective but conduct heat rapidly, allowing fiber lasers to cut them without damage—CO2 systems cannot do this safely. Brass falls between these: it cuts cleanly on fiber lasers but requires precision nozzle height (±0.2 mm) to avoid edge oxidation.
Material thickness interacts directly with tolerance: thicker material dissipates heat across a wider thermal zone, widening the kerf (cut width). Stainless steel 304 at 8 mm achieves ±0.08 mm, but at 15 mm tolerance opens to ±0.15 mm. This is why Entag specifies maximum thickness per material—beyond that threshold, tolerance control becomes impossible without secondary operations.
What metals can be laser cut?
Fiber laser cutting is compatible with mild steel (S235/S355), stainless steel (304/316), aluminum (6061/5052), brass, copper, and galvanized steel. Each material has maximum thickness limits—mild steel up to 20 mm, stainless up to 15 mm, aluminum up to 12 mm—depending on laser power and assist gas used.
What is the maximum thickness for laser cutting steel?
Mild steel (S235/S355) can be fiber laser cut up to 20 mm thickness with ±0.1 mm tolerance per ISO 2768-f. Beyond 20 mm, plasma or waterjet cutting becomes more cost-effective. Stainless steel (304/316) is typically limited to 15 mm for clean, burr-free edges.
Can laser cutting be used on aluminum?
Yes. Fiber lasers cut aluminum effectively up to 12 mm (grades 6061 and 5052 are standard in Egypt). CO2 lasers fail with aluminum due to reflectivity, but fiber lasers at 1,064 nm wavelength handle reflective metals without back-reflection risk to the cutting head.
What materials cannot be laser cut?
PVC and vinyl release toxic chlorine gas when cut. Thick galvanized steel above 4 mm produces harmful zinc fumes. Carbon fiber, fiberglass, and tempered glass are incompatible—they release carcinogenic particles or fracture unpredictably. Always verify material composition before quoting.
What tolerances does laser cutting achieve?
Fiber laser cutting achieves ±0.1 mm positional tolerance on mild and stainless steel, meeting ISO 2768-f (fine) class. Per EN ISO 9013, Entag's cuts achieve Class 2–3 thermal cutting quality—suitable for most structural, industrial, and precision applications without secondary finishing.
Is fiber laser or CO2 laser better for cutting metals?
Fiber lasers are superior for metal cutting: they operate at 1,064 nm wavelength (three times more efficient than CO2 at 10,600 nm), handle reflective metals safely, and achieve tighter tolerances (±0.1 mm vs. ±0.3 mm). CO2 lasers are only preferred for non-metallic cutting (acrylic, wood, paper).
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