Technologies
Sheet metal fabrication is the process of transforming flat metal sheets into functional components through a series of cutting, forming, joining, and finishing operations. It serves industries from a
Sheet metal fabrication is the process of transforming flat metal sheets into functional components through a series of cutting, forming, joining, and finishing operations. It serves industries from automotive to HVAC, producing parts with repeatable precision—typically to tolerances of ±0.1 mm or t
Sheet metal fabrication is the process of transforming flat metal sheets into functional components through a series of cutting, forming, joining, and finishing operations. It serves industries from automotive to HVAC, producing parts with repeatable precision—typically to tolerances of ±0.1 mm or tighter depending on process. Engineers and procurement managers across Egypt and Saudi Arabia rely on sheet metal fabrication to deliver enclosures, brackets, ducts, and structural assemblies at scale.
The core sheet metal fabrication processes are:
This article covers each process, material standards, tolerances, and how to choose the right method for your part geometry and volume.
Sheet metal cutting separates flat sheet stock into blanks and detailed 2D profiles. Laser cutting—particularly fiber laser cutting services in Egypt—is the dominant on-demand process because it requires no tooling, achieves ±0.1 mm positional accuracy, and cuts mild steel, stainless steel, aluminum, and galvanized sheet up to 3 mm thickness. Mechanical shearing produces straight cuts only and is faster and cheaper for simple rectangular blanks but cannot cut holes or curves. Punch press and stamping operations create hole patterns and repeating features on high-volume runs; typical tolerance is ±0.1–0.2 mm per punch hit. At Entag, laser cutting handles part orders from one prototype to 500-unit production batches without tooling fees—a direct advantage over traditional workshops in Cairo, Alexandria, Jeddah, and Riyadh that require minimum order quantities.
CNC press brake bending forms angles, radii, and flanges in sheet metal by forcing the sheet over a V-die or using air-bending techniques. The process holds ±0.5° angular tolerance and ±0.25 mm flange length tolerance per ISO 2768-m. Critical design inputs include minimum bend radius (typically 1–1.5× material thickness for mild steel), bend allowance (calculated per AISC standards), and inside corner radii. Rolling operations form cylindrical tubes and conical shapes; rolling tolerance is ±1–2 mm on radius. Stamping—a high-volume extension of bending—produces identical bent parts in seconds per cycle but requires dedicated tooling. Engineers designing sheet metal parts in Saudi Arabia and Egypt must account for springback (the material's elastic recovery after unloading), which ranges from 2–10° depending on material grade and thickness.
Welding fabrication in Egypt joins cut and bent sheet metal parts into complete assemblies. MIG (Metal Inert Gas) welding is faster, semi-automatic, and suitable for structural welds on mild steel and stainless steel; typical weld quality conforms to ISO 5817 Level C. TIG (Tungsten Inert Gas) welding offers greater control and superior finish quality (ISO 5817 Level B or A), making it preferred for food processing, marine, and pharmaceutical equipment where appearance and corrosion resistance are critical. Both processes require shielding gas and skilled operators. Fastening and riveting—mechanical joining without heat—are alternatives for aluminum, sandwich panels, and applications where heat distortion must be avoided. At Entag, MIG/TIG weld seams are inspected to ISO 5817 standards and require no post-weld rework for most industrial applications.
| Process | Best For | Typical Tolerance | Materials | Relative Cost |
|---|---|---|---|---|
| Fiber Laser Cutting | Complex 2D profiles, high volume | ±0.1 mm | Mild steel, SS, Al, galvanized | Medium |
| CNC Press Brake Bending | Precise bends, enclosures, brackets | ±0.5° / ±0.25 mm | All sheet metals | Low–Medium |
| MIG/TIG Welding | Structural joins, assemblies | Weld per ISO 5817 | Steel, SS, Al | Medium–High |
| Punch Press / Stamping | High-volume hole patterns | ±0.1–0.2 mm | Mild steel, Al | Low (at volume) |
| Roll Forming / Rolling | Cylindrical shapes, tubes | ±1–2 mm radius | Mild steel, SS | Medium |
| Surface Finishing (powder coat, sandblast) | Corrosion protection, aesthetics | N/A | All metals | Low |
Entag's platform allows you to select process, material, and finish in a single quote request—no back-and-forth emails or guesswork.
The standard materials in Egyptian and Saudi Arabian sheet metal shops are mild steel (S235JR / ST37 per EN 10025), stainless steel (AISI 304 and 316L for food and marine), aluminum (5052-H32 and 6061-T6 for lightweight structural parts), and galvanized sheet (DX51D per EN 10327) for HVAC and cladding. Mild steel and galvanized sheet are widely stocked in Cairo, Alexandria, Jeddah, and Dammam at 0.5–3 mm thickness; stainless and aluminum alloys may carry longer lead times depending on gauge and order quantity. Coastal environments—Alexandria and Dammam—require 316L stainless or aluzinc coating for long-term corrosion resistance. Material selection directly impacts cost and lead time; Entag's quoting system shows material availability and lead times upfront before you commit.
What are the main sheet metal fabrication processes?
The core sheet metal fabrication processes are laser cutting, shearing, punching, CNC bending, rolling, MIG/TIG welding, and surface finishing. Each process addresses a specific phase—cutting shapes from flat sheet, forming them into geometry, joining parts into assemblies, and protecting surfaces from corrosion or wear.
What tolerances can be achieved in sheet metal fabrication?
Laser cutting typically achieves ±0.1 mm positional accuracy. CNC press brake bending holds ±0.5° angular tolerance and ±0.25 mm on flange dimensions per ISO 2768-m. Welded assemblies are qualified to ISO 5817. Tighter tolerances require secondary machining operations such as milling or grinding.
What materials are used in sheet metal fabrication in Egypt?
The most common materials are mild steel (S235JR/ST37), stainless steel (AISI 304 and 316L), aluminum alloys (5052-H32 and 6061-T6), and galvanized sheet (DX51D). Mild steel and galvanized sheet are widely stocked in Egypt and Saudi Arabia; stainless and aluminum may carry longer lead times depending on gauge and quantity.
How does laser cutting differ from mechanical shearing for sheet metal?
Laser cutting uses a focused fiber laser beam to cut complex 2D profiles—curves, slots, holes—with ±0.1 mm accuracy and no tooling cost. Shearing makes straight-line cuts only and is faster and cheaper for simple rectangular blanks. Laser cutting is preferred for detailed parts; shearing for simple prep cuts.
What is the minimum order quantity for sheet metal fabrication at Entag?
Entag operates as an on-demand platform with no minimum order quantity. Engineers and procurement managers in Egypt and Saudi Arabia can order as few as one prototype part or scale to production runs. Quotes are generated online—upload your CAD file and receive pricing within 24 hours.
Which sheet metal fabrication process is best for HVAC components?
HVAC components—ducts, enclosures, brackets—are typically produced using laser cutting for profiles, CNC press brake bending for angles and flanges, and MIG welding for assemblies. Galvanized sheet (DX51D) is the standard material for corrosion resistance. In Egypt and Saudi Arabia, HVAC fabrication commonly uses 0.8–2.0 mm galvanized sheet.
Ready to start your project? Request a quote on Entag — upload your CAD file and get a price in 24 hours. Serving Cairo, Alexandria, Jeddah, Riyadh, and Dammam with no minimum order quantity and no hidden tooling fees.
