.png)
When Not to Use Stainless Steel: What the Pros Know
At Builders Stainless, we specialize in high-quality stainless steel fasteners and hardware — but we’ll be the first to say: stainless steel isn’t always the right choice.
There are specific situations where using stainless is unnecessary, inefficient, or even problematic. If you’re a builder, fabricator, or homeowner trying to make the right call, this guide will walk you through when not to use stainless steel — and what to use instead.
1. When You're Building in a Dry, Indoor Environment
If you’re working indoors — away from moisture, chemicals, or extreme temperature swings — stainless steel might be overkill.
Example:
• Hanging drywall or building an interior wood frame?
• Installing cabinetry or shelving?
Use instead: Coated steel screws, zinc-plated fasteners, or phosphate drywall screws
Stainless is built to withstand corrosion. If there's no corrosion threat, it's like wearing a raincoat in the desert.
2. When Galvanic Corrosion Could Occur
Stainless steel doesn't always play well with other metals. If you fasten stainless into aluminum or carbon steel without isolating the metals, it can cause galvanic corrosion — which eats away at the weaker metal.
Example:
• Mounting stainless hardware directly onto aluminum framing or panels
• Fastening stainless screws into galvanized sheet metal
Watch out: You’ll often see corrosion rings form around the connection over time.
Solution: Use isolators, plastic washers, or choose compatible materials like aluminum fasteners for aluminum builds.
3. When You Need Higher Shear Strength or Hardness
Stainless steel is tough — but it’s not the hardest material available. In applications where load-bearing, shear strength, or thread integrity is critical (especially with fine threads), hardened carbon steel or alloy fasteners are often better.
Example:
• Automotive or engine assemblies
• Structural steel framing under heavy load
• Critical load joints where torque is extreme
Use instead: Grade 5 or Grade 8 alloy steel fasteners (black oxide, zinc-coated, or phosphate-treated)
Stainless can stretch or gall under extreme torque if not lubricated properly.
4. When Cost Is the Primary Concern
There’s no sugarcoating it — stainless steel is more expensive than zinc or coated steel. If you’re building in a protected, temporary, or low-risk environment and need to stay under budget, stainless may not be worth the upgrade.
Example:
• Temporary scaffolding or bracing
• Interior furniture or fixtures
• Non-structural outdoor projects in dry climates
Use instead: Galvanized or ceramic-coated fasteners (like ACQ-rated deck screws) for light-duty outdoor use
Pro tip: Save your budget by using stainless only where it matters — such as visible or load-bearing exterior elements.
5. When Welding Isn't Required (Or is Difficult)
Welding stainless requires special equipment, shielding gases, and knowledge. It’s not ideal for every job site.
If you're planning field-welding or working in basic fab conditions, mild steel is easier and cheaper to weld.
Use instead: Mild steel tubing, angle, or plates — with painted or galvanized finish afterward
So When Should You Use Stainless?
Use stainless steel when you need:
• Corrosion resistance (especially in coastal, humid, or chemical environments)
• Low maintenance (no rust, no painting, no flaking)
• A clean finish (for decks, railings, visible hardware)
• Long-term durability in outdoor or marine environments
Honest Advice from Builders Stainless
We sell only stainless steel — and we sell it proudly. But more importantly, we help customers make the right decision.
If you're unsure whether stainless is necessary for your project, reach out. We'll tell you honestly — even if that means pointing you toward a different material or solution.
That’s what makes us different.
