Choosing the right material for aluminum sheet metal fabrication, or any sheet metal project, is one of the highest-leverage decisions an engineer makes. Specify stainless steel where mild steel works and you triple material cost. Use 6061-T6 where 5052-H32 suffices and you get cracked bends at prototype stage. This guide covers every major sheet metal material with full property data, cost indices and fabrication rules.
Manufyn’s aluminum sheet metal fabrication service covers 5052-H32, 6061-T6, stainless 304/316, mild steel, copper and titanium, mill-certified material, free DFM review included on every quote.
How to Choose a Sheet Metal Material for Aluminum Sheet Metal Fabrication
Choose sheet metal material on four criteria: (1) mechanical strength for the load, (2) operating environment, corrosion, temperature, food contact, (3) weight constraint, aluminum sheet metal fabrication saves 65% weight vs steel at equivalent section, (4) budget, mild steel is 1× baseline, titanium is 20×.
For most aluminum sheet metal fabrication projects, 5052-H32 is the default for enclosures and panels; 6061-T6 for structural brackets; stainless steel for hygienic or corrosive environments. See our sheet metal fabrication design guide for how material choice interacts with bend radius and DFM rules.
Aluminium Grades for Sheet Metal Fabrication
Aluminum sheet metal fabrication accounts for the second-largest global sheet metal volume after steel. Aluminium’s density of 2.7 g/cm³ vs steel’s 7.85 g/cm³ makes it the default choice wherever weight matters, aerospace, electronics, portable equipment.
Aluminium 5052-H32, The Fabrication Workhorse
| Property | 5052-H32 Value | Why It Matters for Sheet Metal Fabrication |
|---|---|---|
| Yield Strength | 193 MPa | Adequate for enclosures, panels, brackets |
| Tensile Strength | 228 MPa | Good structural performance at light weight |
| Elongation | 12% | Excellent formability, resists cracking on bends |
| Min. Bend Radius | 1× material thickness (grain) | Most forgiving Al grade for press brake work |
| Weldability | Excellent, TIG with 5356 wire | Clean welds with correct filler |
| Corrosion Resistance | Excellent (incl. marine) | Outperforms 6061 in salt and moisture |
| Anodisability | Good, clear and colour | Takes anodise well for aesthetic enclosures |
| Cost Index vs Mild Steel | 3.5× | Most cost-effective aluminium grade |
| Best For | Enclosures, HVAC, electronics, marine panels | Widest application range |
Aluminium 6061-T6, High-Strength Structural
Aluminum sheet metal fabrication with 6061-T6 delivers 276 MPa yield strength, 43% stronger than 5052-H32. The trade-off: minimum bend radius is 3× thickness with grain (vs 1× for 5052). Welding reduces strength in the heat-affected zone to ~60–70% of base material, factor this into joint design. For the full bend radius rules by alloy, see our DFM sheet metal design guide.
| Property | 6061-T6 | vs 5052-H32 |
|---|---|---|
| Yield Strength | 276 MPa | +43% stronger |
| Min. Bend Radius | 3× thickness | 3× more conservative, design carefully |
| Weld HAZ Strength | ~60–70% of base | Significant reduction at weld zones |
| Hard Anodise | Excellent Type III | Better wear surface than 5052 |
| Cost Index | 3.8× | Marginally more than 5052 |
| Best For | Structural brackets, aerospace, automotive | Strength-critical applications |
Stainless Steel Sheet Metal Fabrication: 304 vs 316
Stainless steel sheet metal fabrication costs 4–5× more than mild steel per completed part. The choice between 304 and 316 comes down to chloride exposure. SS 304 is the default for food, medical and architectural applications. SS 316 adds 2–3% molybdenum and is mandatory within 300m of the sea, in pharmaceutical clean rooms, or anywhere chloride is present.
| Property | SS 304 (1.4301) | SS 316 (1.4401) | Choose When |
|---|---|---|---|
| Yield Strength | 215 MPa | 220 MPa | — |
| Corrosion | Excellent, food acids, atmosphere | Outstanding, seawater, chloride | 304 standard; 316 marine/coastal/pharma |
| Weldability | Excellent, ER308 filler | Excellent, ER316L filler | Specify correct filler wire on drawing |
| NOT For | Seawater, pools, coastal | — | Switch to 316 within 300m of sea |
| Cost Index | 4.0× | 4.8× | Use 304 unless chloride confirmed |
| Best For | Food, medical, architecture, lab | Marine, pharma, chemical | — |
Mild Steel Sheet Metal Fabrication: DC01, S235, Galvanised
Mild steel sheet metal fabrication accounts for the largest share of global volume. DC01 (cold-rolled) is the default for enclosures and brackets, smooth surface ideal for powder coat. S235/S355 hot-rolled grades suit structural frames. Galvanised G90 (275 g/m² zinc) is the SMACNA-standard material for HVAC ductwork and outdoor construction. For detailed HVAC material specifications, see our sheet metal fabrication HVAC guide.
| Grade | Yield (MPa) | Surface Quality | Weldability | Best Use | Cost |
|---|---|---|---|---|---|
| DC01 (cold rolled) | 140–280 | Smooth, ideal for powder coat | Excellent | Enclosures, brackets, general fabrication | 1.0× |
| DC04 (cold rolled) | 140–210 | Smooth, best formability | Excellent | Deep drawn parts, complex forms | 1.05× |
| S235 (hot rolled) | 235 | Rough, structural | Excellent | Heavy frames, gantries, supports | 0.95× |
| S355 (hot rolled) | 355 | Rough, structural | Very good | High-load structure, thinner sections | 1.1× |
| Galvanised G90 | 210 | Zinc-coated, no painting needed | Good | HVAC ductwork, outdoor construction | 1.4× |
Specialist Sheet Metal Materials: Copper, Brass, Titanium
| Material | Key Property | Cost Index | Best Applications |
|---|---|---|---|
| Copper C101 | Highest electrical conductivity (101% IACS) | 10× | Busbars, heat exchangers, PCB shields |
| Brass C260 | Conductivity + machinability + gold appearance | 8× | Terminals, connectors, decorative hardware |
| Titanium Gr.2 | Exceptional corrosion + low density | 20× | Aerospace, medical, chemical plant |
| Titanium Gr.5 | 40% stronger than Gr.2 (Ti-6Al-4V) | 25× | Aerospace primary structure, motorsport |
Master Sheet Metal Material Comparison Table
| Material | Yield (MPa) | Density g/cm³ | Corrosion | Weldability | Formability | Cost | Primary Use |
|---|---|---|---|---|---|---|---|
| Al 5052-H32 | 193 | 2.68 | Excellent | Excellent | Excellent | 3.5× | Enclosures, marine, HVAC |
| Al 6061-T6 | 276 | 2.70 | Good | Good | Moderate | 3.8× | Structural, aerospace |
| SS 304 | 215 | 7.93 | Excellent | Excellent | Good | 4.0× | Food, medical, architecture |
| SS 316 | 220 | 7.98 | Outstanding | Excellent | Good | 4.8× | Marine, pharma, chemical |
| Mild Steel DC01 | 210 | 7.85 | Poor (bare) | Excellent | Excellent | 1.0× | General fabrication |
| Galvanised G90 | 210 | 7.85 | Good | Good | Excellent | 1.4× | HVAC, construction |
| Copper C101 | 70 | 8.96 | Good | Good | Excellent | 10× | Electrical, thermal |
| Titanium Gr.2 | 275 | 4.51 | Outstanding | Good TIG | Moderate | 20× | Aerospace, medical |
Material Decision Guide for Sheet Metal Fabrication
| Your Requirement | Specify This Material |
|---|---|
| Lowest cost, indoor use, painted or powder coated | Mild Steel DC01 |
| HVAC ductwork, outdoor without painting | Galvanised Steel G90 |
| Lightweight enclosure, moderate strength | Aluminium 5052-H32 |
| High-strength lightweight bracket or structure | Aluminium 6061-T6 |
| Food contact, hygienic surfaces, medical equipment | Stainless Steel 304 |
| Marine, chloride environment, coastal, pharmaceutical | Stainless Steel 316 |
| Electrical conductor, heat sink, busbar | Copper C101 |
| Maximum corrosion resistance, aerospace or medical | Titanium Grade 2 or 5 |
Tell us your material and quantity, Manufyn quotes aluminum sheet metal fabrication from India in 24 hours. All materials in this guide available. Free DFM review. No minimum order. Or explore our full sheet metal services.
Frequently Asked Questions, Aluminum Sheet Metal Fabrication
Aluminum sheet metal fabrication is the manufacture of parts from aluminium alloy sheet through laser cutting, CNC bending, welding and surface finishing. The most common grades are 5052-H32 (best formability, excellent corrosion resistance) and 6061-T6 (highest strength, structural applications). Manufyn’s aluminum sheet metal fabrication service uses fibre laser cutting to ±0.05mm, CNC press brake bending, TIG/MIG welding with correct filler wire, and anodising or powder coat finishing.
5052-H32 has better formability (bend radius 1× thickness vs 3× for 6061) and better corrosion resistance, the default for enclosures and panels. 6061-T6 is 43% stronger (276 MPa yield) and used for structural brackets and aerospace. 6061 loses 30–40% strength at weld zones. Choose 5052 unless structural loading specifically demands 6061. See our DFM design guide for bend radius rules by grade.
SS 304 costs ~4× mild steel baseline vs aluminium 5052 at ~3.5×. Because stainless is 2.9× denser than aluminium, a same-geometry enclosure in stainless weighs ~3× more, making the total material cost 7–10× higher than aluminium.
Galvanised steel G90 is standard for outdoor structural and HVAC work. Aluminium 5052-H32 where weight matters. SS 304 for coastal architectural. SS 316 mandatory within 300m of the sea or where chloride is present. See Manufyn’s full sheet metal material range and get a quote.
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