S450GD Steel Roll Forming Material Guide: Coil Sizes, Strength & Applications
S450GD Steel Roll Forming Material
1. Overview of S450GD Steel in Roll Forming
S450GD is a high-strength structural steel grade defined under EN 10346, offering a minimum yield strength of 450 MPa. It is widely used in roll forming where higher strength and reduced material thickness are required.
In roll forming, S450GD is commonly used for heavy-duty purlins, structural framing, solar mounting systems, and industrial sections.
Compared to S350GD, S450GD provides higher load capacity while allowing thinner material usage, improving efficiency and reducing weight.
2. Material Composition & Structure
S450GD consists of:
- Iron base metal
- Low carbon content
- Manganese
- Micro-alloying elements (niobium, vanadium)
Structure
- Fine grain structure
- Optimized for cold forming
- High strength with controlled ductility
3. Available Coil Specifications
Thickness Range
- 0.6mm – 3.0mm
Coil Width
- 600mm – 1500mm
Coil Weight
- 3 tons – 10 tons
Coil ID / OD
- ID: 508mm / 610mm
- OD: up to 1600mm
Tolerance
- Tight thickness tolerance
- High flatness quality
4. Mechanical Properties
Typical values:
- Yield Strength: ≥450 MPa
- Tensile Strength: 480 – 620 MPa
- Elongation: 12% – 18%
- Hardness: 140 – 200 HB
5. Coating Types
S450GD is commonly supplied with:
- Z (Zinc coating) → Z100, Z180, Z275, Z450
- AZ (Aluzinc coating) → AZ100, AZ150
- Painted (PPGI / PPGL)
Coating Thickness:
- 100–600 g/m²
6. Surface Finishes
- Galvanized
- Aluzinc
- Painted (color coated)
- Mill finish (less common)
7. Common Roll Forming Applications
- Heavy-duty C and Z purlins
- Solar mounting structures
- Structural framing systems
- Steel building components
- High-load support profiles
8. Advantages of S450GD Steel
- Very high strength
- Reduced material thickness required
- Excellent load-bearing capacity
- Compatible with coatings
- Cost savings in structural designs
9. Disadvantages / Limitations
- Higher springback during forming
- Reduced ductility vs lower grades
- Increased risk of cracking in tight bends
- Requires precise tooling setup
- Higher tooling wear
10. Roll Forming Machine Considerations
Roll Tooling
- Heavy-duty hardened rollers required
- Additional forming stations recommended
Speed
- 10–35 m/min
Lubrication
- Recommended
Cutting
- Hydraulic or flying shear
- High-strength blades required
Common Issues
- Springback
- Edge cracking
- Tool wear
11. Common Problems in Production
- Springback causing dimensional inaccuracies
- Cracking at tight bend radii
- Coating damage (painted versions)
- Increased roller wear
- Forming instability if setup is incorrect
12. Pricing Guide
Typical global pricing:
- Low: $800–$1000 per ton
- Medium: $1000–$1400 per ton
- High: $1400–$1800+ per ton
Factors affecting price:
- Coating type
- Thickness
- Market demand
- Supplier origin
13. Comparison with Other Materials
S450GD vs S350GD
- S450GD = higher strength
- S350GD = easier to form
S450GD vs HSLA
- S450GD = specific standardized grade
- HSLA = broader category
S450GD vs Aluminum
- Steel = stronger
- Aluminum = lighter
14. Best Industries Using S450GD Steel
- Construction and steel buildings
- Solar mounting systems
- Industrial structures
- Warehousing systems
- Infrastructure projects
15. How to Choose S450GD Steel
Choose S450GD When:
- High strength is required
- Weight reduction is important
- Structural efficiency is needed
- Heavy-duty purlins or frames
Avoid When:
- Complex forming required
- Tight bend radii needed
- Lower cost alternatives acceptable
16. FAQ Section
What is S450GD steel?
A high-strength structural steel grade used in roll forming.
What does 450 mean?
Minimum yield strength of 450 MPa.
Is S450GD suitable for roll forming?
Yes, but requires proper machine setup.
What is it used for?
Purlins, solar frames, structural components.
Does S450GD crack during forming?
It can if bend radii are too tight.
17. Machine Matcher Section
We supply roll forming machines for all material types including S450GD steel.
- Custom-built machines to your profile
- New machines built to specification
- Global delivery available
- UK and USA technical support
Contact:
Machine Matcher
Sales & Technical Team
Quick Specs
Thickness
0.6–3.0mm
Yield Strength
≥450 MPa
Coil Width
600–1500mm
Coil ID
508 / 610mm