Sheet Metal Materials Guide
Pick the right sheet metal for your fabricated parts
Sheet metal material selection involves considerations unique to forming processes: bendability (minimum bend radius), weldability, springback compensation, and available gauges. The wrong material choice can mean cracked bends, warped welds, or parts that spring out of tolerance.
Key Selection Factors
Bendability
Minimum bend radius before cracking. Softer alloys bend tighter.
Weldability
How well the material TIG/MIG/spot welds without distortion or cracking.
Springback
How much the material bounces back after bending — must be compensated in tooling.
Gauge Availability
Standard thickness availability and cost per gauge.
Laser Cutting Quality
Edge quality, heat-affected zone, and maximum thickness for clean cuts.
Finish Options
Paintability, anodizing compatibility, and as-finished appearance.
Recommended Materials
The #1 choice for sheet metal enclosures. 5052 bends beautifully without cracking, welds easily, and anodizes well. 6061 is stronger but cracks at tight bend radii.
The workhorse stainless for sheet metal. Excellent corrosion resistance, good formability, welds well with TIG. 316L for marine/chemical environments, 430 for decorative applications.
Cheapest sheet metal option. Bends and welds easily. Must be painted or plated for corrosion protection. Best for indoor/painted applications where cost matters most.
Best electrical and thermal conductivity. Bends well, solders easily, and develops a beautiful natural patina. Used when conductivity is non-negotiable.
Excellent formability — it's called "cartridge brass" because it can be deep-drawn into bullet casings. Beautiful gold appearance, antimicrobial properties.
💡 Pro Tips
- ▸ For bendable aluminum, always specify 5052 over 6061. 6061-T6 cracks at bend radii below 2× thickness.
- ▸ Standard gauges are cheapest: 1.0mm, 1.5mm, 2.0mm, 3.0mm. Odd thicknesses cost more.
- ▸ Cold-rolled steel (SPCC) gives better surface finish than hot-rolled (SPHC). Use CR for visible parts.
- ▸ Stainless steel springback is 3–5× higher than mild steel. Tooling must compensate or parts won't hold angle.
- ▸ For painted parts, mild steel is 40–60% cheaper than aluminum. Only use aluminum when you need the weight savings.
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