South Africa Precision Engineering Firm Orders 7075 Aluminum Sheet 0.2mm 0.25mm 0.3mm and 5754 H111 1mm
Published On: November 13, 2026
A precision engineering company in Gauteng, South Africa has placed a combined order for 7075 aluminum sheet plates in 0.2mm, 0.25mm and 0.3mm together with 5754 aluminum sheets in 1mm H111, consolidating two very different material duties into a single certified shipment. The 7075 thin gauges go into aerospace shims, instrument brackets and precision mechanism parts where high strength at minimum weight is the design driver, while the 5754 H111 sheet is formed into marine panels, fuel tank baffles and road-transport components that must survive constant vibration and moisture.
The buyer supplies machined and formed components to aerospace subcontractors, defence programmes and marine equipment builders, and holds stock for shops that cannot meet mill minimums. Its workshop runs CNC milling, laser cutting, forming and anodising, so material arrives as sheet and leaves as finished parts that must be traceable back to a heat number. Because it imports through Durban and trucks inland, packing quality and corrosion protection matter as much as the alloy.
- Two incompatible duties in one order. High-strength 7075 and formable, corrosion-resistant 5754 had previously come from different traders, doubling paperwork and freight.
- Extreme thin gauge supply. 0.2mm and 0.25mm 7075 sheet is difficult to source in small quantities with full certification, and local stockists rarely hold it.
- Flatness on light gauges. Thin sheet arrived with edge waves and buckles that jammed into the laser bed and distorted shim stacks.
- Traceability for aerospace customers. Subcontractors demanded mill certificates tied to heat number, with chemistry and mechanical properties per ASTM B209.
- Corrosion during transit. Condensation inside containers during the Durban leg caused water staining on unprotected sheets.
- Exchange rate and freight exposure. Splitting orders between suppliers multiplied freight and banking costs against a volatile rand.
We quoted both alloys from one mill and shipped them as a single consolidated lot. 7075 (UNS A97075) is a zinc-magnesium-copper alloy with the highest strength of the common wrought grades, and at 0.2–0.3mm it is normally supplied in T6 temper for shims and formed brackets, or in O temper where tight radii must be formed before ageing. Thickness on these light gauges is held to plus or minus 0.01mm and flatness to within 2mm per metre after tension levelling, which lets sheets sit flat on a laser bed and stack into accurate shim packs.
5754 (UNS A95754) in H111 is the marine workhorse of the 5000 series: 2.6–3.6% magnesium, annealed and then lightly work-hardened to give a stable, formable sheet with excellent seawater and industrial atmosphere resistance. H111 is chosen over harder tempers because it bends and rolls without cracking and welds cleanly with 5356 filler. Supplied at 1mm in 1000x2000mm and 1219x2438mm, it covers both production blanks and stock sales.
Every sheet carries a mill certificate with heat number, chemistry and mechanical properties; thin 7075 sheets are interleaved with neutral paper, VCI wrapped and crated with desiccant so no condensation forms on the surface.
| Attribute | 7075 (T6 / O) | 5754 (H111) |
|---|---|---|
| Series | 7000, Al-Zn-Mg-Cu | 5000, Al-Mg |
| Strength | Very high, up to 570 MPa tensile in T6 | Moderate, 190–240 MPa tensile |
| Formability | Limited in T6, good in O temper | Excellent, bends and rolls without cracking |
| Corrosion resistance | Fair, cladding or anodising recommended | Excellent, seawater and industrial atmosphere |
| Weldability | Poor, not normally welded | Good, 5356 filler recommended |
| Typical duty | Shims, instrument parts, aerospace brackets | Marine panels, fuel tank baffles, transport parts |
| Parameter | Specification |
|---|---|
| Alloy 1 | 7075 (UNS A97075), temper T6 or O |
| Alloy 1 thickness | 0.2mm / 0.25mm / 0.3mm |
| Alloy 2 | 5754 (UNS A95754), temper H111 |
| Alloy 2 thickness | 1.0mm |
| Sheet sizes | 1000x2000mm / 1219x2438mm, cut to size |
| Thickness tolerance | ±0.01mm (7075 thin gauge), ±0.05mm (5754) |
| Flatness | ≤2mm per metre |
| 7075 tensile strength | ≥540 MPa (T6) |
| 5754 tensile strength | 190 – 240 MPa |
| Surface protection | Neutral paper interleaved, VCI film |
| Documentation | Mill certificate with heat number per sheet lot |
| Standard | ASTM B209, EN 573-3, EN 485-2 |
- One certified shipment now covers both the high-strength and the marine-side material, cutting freight and banking costs.
- Thin 7075 sheet at ±0.01mm and 2mm per metre flatness eliminated laser-bed jams and shim-stack rework.
- Heat-number traceability satisfied aerospace subcontractor audits on the first submission.
- VCI packing and desiccant ended condensation staining on the Durban sea leg.
- Consolidated ordering removed dual-supplier price exposure against rand volatility.
Pairing a high-strength aerospace alloy with a formable marine grade in one certified, well-packed shipment is not a standard catalogue offer, but it is exactly what a diversified engineering supplier needs. The result for the South African buyer: fewer suppliers, tighter flatness on the thinnest gauges, and documentation that stands up to audit.
