Steel vs Aluminum for Roll Forming: Which Material is Better?

Steel vs Aluminum Roll Forming Materials

1. Overview: Steel vs Aluminum in Roll Forming

Steel and aluminum are the two most commonly used materials in roll forming.

Choosing between them affects:

Product strength
Weight
Corrosion resistance
Machine setup
Production cost

There is no universal winner — the best choice depends on your application, environment, and budget.

2. What is Steel in Roll Forming?

Steel is the most widely used material in roll forming due to its strength, durability, and cost-effectiveness.

Common Types:

Mild steel
Galvanized steel (GI)
Pre-painted steel (PPGI / PPGL)
High strength steel (S350 / S450)
Stainless steel

👉 Steel is ideal for structural and heavy-duty applications

3. What is Aluminum in Roll Forming?

Aluminum is a lightweight metal known for its excellent corrosion resistance and formability.

Common Types:

Mill finish aluminum
Painted aluminum
Stucco embossed aluminum
Alloy grades (3003, 3004, 5052)

👉 Aluminum is ideal for lightweight and corrosion-resistant applications

4. Key Differences Between Steel and Aluminum

Strength

Steel: High strength
Aluminum: Lower strength

👉 Steel is better for structural applications

Weight

Steel: Heavy
Aluminum: Lightweight (≈ 1/3 of steel)

👉 Aluminum is better for transport and installation

Corrosion Resistance

Steel: Requires coating (GI, PPGI)
Aluminum: Naturally corrosion resistant

👉 Aluminum performs better in harsh environments

Formability

Steel: Good (depends on grade)
Aluminum: Excellent

👉 Aluminum is easier to form into complex profiles

Cost

Steel: Lower cost
Aluminum: Higher cost

👉 Steel is more economical for large-scale production

Durability

Steel: Very durable and strong
Aluminum: Durable but softer

👉 Steel resists impact better

5. Quick Comparison

Steel

Strength: High
Corrosion Resistance: Medium (with coating: High)
Cost: Low
Formability: Medium

Aluminum

Strength: Low–Medium
Corrosion Resistance: Very High
Cost: Medium–High
Formability: Very High

6. Best Applications for Steel

Steel is best used for:

Purlins and structural sections
Decking systems
Fencing and infrastructure
Industrial buildings
Load-bearing components

👉 Choose steel when strength is the priority

7. Best Applications for Aluminum

Aluminum is best used for:

Gutters and downpipes
Flashing and trim
Roofing panels (lightweight systems)
Architectural cladding
Portable roll forming applications

👉 Choose aluminum when weight and corrosion resistance matter

8. Machine Considerations

Steel

Requires stronger roll forming machines
Higher tooling wear
Lower forming speeds for thick materials

Aluminum

Easier on tooling
Higher production speeds
Lower machine stress

9. Common Problems in Production

Steel Issues

Springback in high strength grades
Coating damage
Tool wear

Aluminum Issues

Denting and scratching
Oil canning
Surface marking

10. Pricing Comparison

Typical global pricing:

Steel: $600–$1400/ton (depending on coating and grade)
Aluminum: $2000–$4000/ton

👉 Aluminum is typically 2–3x more expensive than steel

11. Which Material Should You Choose?

Choose Steel If:

You need high strength
Budget is limited
Product is structural
Impact resistance is required

Choose Aluminum If:

Weight reduction is important
High corrosion resistance is required
Product is decorative or visible
Easy forming is needed

12. Hybrid Use (Common Strategy)

Many manufacturers use both materials:

Steel for structure
Aluminum for finishing components

👉 This provides the best balance of cost and performance

13. FAQ Section

Is steel stronger than aluminum?

Yes, steel is significantly stronger.

Is aluminum better for outdoor use?

Yes, due to its natural corrosion resistance.

Which is cheaper?

Steel is much cheaper than aluminum.

Which is easier to roll form?

Aluminum is easier to form.

Can the same machine run both materials?

Yes, but setup adjustments are required.

14. Machine Matcher Section

We help you choose between steel and aluminum based on your application.

Material and machine matching
Custom-built roll forming machines
Multi-material machine setups
Global delivery available
UK and USA engineering support

Contact:
Machine Matcher
Sales & Technical Team

Quick Specs (General Comparison)

Thickness
Steel: 0.3–4.0mm
Aluminum: 0.3–2.0mm

Yield Strength
Steel: 250–550 MPa
Aluminum: 80–300 MPa

Coil Width
100–1500mm

Coil ID
508 / 610mm