Why composite materials work so well

As with the principles that make a steel I-beam so strong, it is the outside faces of a composite that does most of the work when the sheet is subject to bending, so separating these faces makes for efficient use of the material.

For a composite to be most effective:

• The core needs to have good compression resistance and shear strength.
• The skin material needs to have a high modulus and tensile strength.
• The adhesive bond of skin to core is critical for maintaining composite performance.

Composites: A sustainable choice
This efficient use of materials means less raw materials are needed to create high performance sheets.

Coretinium derives its performance from the high quality pre-finished steel skins

The high strength of steel
The high Young’s modulus of steel makes it a very effective skin material compared to other options:

The other benefits of steel
Steel offers some significant benefits over other traditional skin materials:

• Durable – UV resistant skin.
• Fire safe – A1 non-combustible.
• Resistant to creep.
• Magnetic.
• Easy to process on CNC.
• Easy to mechanically fix to.
• Strong stable surface for adhesive.
• Recyclable*.

* With typically 85% of product weight coming from the Coretinium^® steel skins; at its end-of-life the composite sheet can be considered as steel scrap and recycled back into the steel making process without the need to separate the core from the skin.

Optimised materials
Colorcoat Prisma^® pre-finished steel outer skins combine to provide enhanced aesthetics and long-term performance and durability.

Colorcoat Prisma^® pre-finished steel layers

Submit an enquiry.

Product properties

Total weight
8.3kg/m² with 0.40mm skins (s)
10.7kg/m² with 0.55mm skins (s)
12.7kg/m² with 0.675mm skins (s)
Note: asymmetric skin combinations are possible

Total product thickness (H) 
10mm ± 0.2mm

Thermal properties
Thermal conductivity - K value ( λ ) : 0.070 W/mK
Thermal resistance - R value : 0.143 m²k/W
 
Core composition
Co-polymer blend of polypropylene with mineral fill for additional strength 

Core specifications (nominal)
Cell size (D)                   7.0mm Ø
Cell wall thickness (t)  600µm
Core thickness             8.9mm
Core density                 210kg/m3

Skin composition
Pre-finished steel skins
Coatings: 255g/m² Galvalloy™ with a 3 layer 65 micron Colorcoat Prisma^® paint finish

Young's modulus: 207GPa
Poisson’s ratio: 0.3
Density: 7854kg/m3

Steel specification
0.55mm S320GD+ZA (320N/mm² min yield stress) 
0.40mm S280GD+ZA (280N/mm² min yield stress)
0.675mm S280GD+ZA (280N/mm² min yield stress)

Submit an enquiry.

Coretinium^® can be supplied as either mill width sheets for customers to cut to size themselves or tight tolerance custom sized sheets processed on Tata Steel’s own 5 axis CNC.

Mill width sheets

Steel width: 1240mm +/- 3mm
Core width: 1290mm +/- 10mm
Lengths (10mm thick panel): 3m to 10m

Cut to size sheets

Widths from 250mm to 1240mm
Lengths from 300mm to 6250mm
CNC tolerances at +/- 0.5mm

Additional processing

Hole drilling / cut outs
Core stripping on edges
 

Submit an enquiry.

10mm applications

10mm Coretinium^® offers a great combination of strength with limited thickness, making it possible create new solutions where overall product thickness is critical.

Moving deck trailers

A perfect example of this is in moving deck commercial vehicle trailers, were the 10mm Coretinium product has been used to free up valuable internal space within the trailer – allowing Tiger Trailers to create innovative new designs capable of accommodating different cage types and palletised loads

Rear Doors on trailers.

With its 0.55mm Colorcoated skins and a high density core, the 10mm Coretinium can be used as a light weight alternative to 19mm Plymetal doors. Tata Steel can supply door blanks, cut to size with holes pre-drilled along with a PVC door seal optimised for the 10mm product.

Submit an enquiry.

The following Coretinium^® downloads are available:

Why composite materials work so well

As with the principles that make a steel I-beam so strong, it is the outside faces of a composite that does most of the work when the sheet is subject to bending, so separating these faces makes for efficient use of the material.

For a composite to be most effective:

• The core needs to have good compression resistance and shear strength.
• The skin material needs to have a high modulus and tensile strength.
• The adhesive bond of skin to core is critical for maintaining composite performance.

Composites: A sustainable choice
This efficient use of materials means less raw materials are needed to create high performance sheets.

Coretinium derives its performance from the high quality pre-finished steel skins

The high strength of steel
The high Young’s modulus of steel makes it a very effective skin material compared to other options:

The other benefits of steel
Steel offers some significant benefits over other traditional skin materials:

• Durable – UV resistant skin.
• Fire safe – A1 non-combustible.
• Resistant to creep.
• Magnetic.
• Easy to process on CNC.
• Easy to mechanically fix to.
• Strong stable surface for adhesive.
• Recyclable*.

* With typically 85% of product weight coming from the Coretinium^® steel skins; at its end-of-life the composite sheet can be considered as steel scrap and recycled back into the steel making process without the need to separate the core from the skin.

Optimised materials
Colorcoat Prisma^® pre-finished steel outer skins combine to provide enhanced aesthetics and long-term performance and durability.

Colorcoat Prisma^® pre-finished steel layers

Submit an enquiry.

Product properties

Total weight
9.1kg/m² with 0.40mm skins (s)
11.5kg/m² with 0.55mm skins (s)
13.4kg/m² with 0.675mm skins (s)
Note: asymmetric skin combinations are possible

Total product thickness (H) 
25mm ± 0.2mm

Thermal properties
Thermal conductivity - K Value ( λ ) : 0.090 W/mK
Thermal resistance - R Value : 0.278 m²k/W
 
Core composition
Co-polymer blend of polypropylene with mineral fill for additional Strength 

Core specifications (nominal)
Cell size (D)                   7.0mm Ø
Cell wall thickness (t)  400µm
Core thickness             23.9mm
Core density                 80kg/m³

Skin composition
Pre-finished steel skins
Coatings: 255g/m² Galvalloy™ with a 3 layer 65 micron Colorcoat Prisma^® paint finish

Young's modulus: 207 GPa
Poisson’s Ratio: 0.3
Density: 7854 kg/m3

Steel specification
0.55mm S320GD+ZA (320N/mm² min yield stress)
0.40mm S280GD+ZA (280N/mm² min yield stress)
0.675mm S280GD+ZA (280N/mm² min yield stress)

Submit an enquiry.

Coretinium^® can be supplied as either mill width sheets for customers to cut to size themselves or tight tolerance custom sized sheets processed on Tata Steel’s own 5 axis CNC.

Mill width sheets

Steel width: 1240mm +/- 3mm
Core width: 1290mm +/- 10mm
Lengths (25mm thick panel): 2.8m to 10m

Cut to size sheets

Widths from 250mm to 1240mm
Lengths from 300mm to 6250mm
CNC tolerances at +/- 0.5mm

Additional processing

Hole drilling / cut outs
Core stripping on edges
 

Submit an enquiry.

25mm applications

25mm panels made with a lightweight core has exceptional flexural rigidity to weight making it ideal for applications were products need to maintain their flatness while being subjected to universally distributed loads    
 

Submit an enquiry.

The following Coretinium^® downloads are available:

Why composite materials work so well

As with the principles that make a steel I-beam so strong, it is the outside faces of a composite that does most of the work when the sheet is subject to bending, so separating these faces makes for efficient use of the material.

For a composite to be most effective:

• The core needs to have good compression resistance and shear strength.
• The skin material needs to have a high modulus and tensile strength.
• The adhesive bond of skin to core is critical for maintaining composite performance.

Composites: A sustainable choice
This efficient use of materials means less raw materials are needed to create high performance sheets.

Coretinium derives its performance from the high quality pre-finished steel skins

The high strength of steel
The high Young’s modulus of steel makes it a very effective skin material compared to other options:

The other benefits of steel
Steel offers some significant benefits over other traditional skin materials:

• Durable – UV resistant skin.
• Fire safe – A1 non-combustible.
• Resistant to creep.
• Magnetic.
• Easy to process on CNC.
• Easy to mechanically fix to.
• Strong stable surface for adhesive.
• Recyclable*.

* With typically 85% of product weight coming from the Coretinium^® steel skins; at its end-of-life the composite sheet can be considered as steel scrap and recycled back into the steel making process without the need to separate the core from the skin.

Optimised materials
Colorcoat Prisma^® pre-finished steel outer skins combine to provide enhanced aesthetics and long-term performance and durability.

Colorcoat Prisma^® pre-finished steel layers

Submit an enquiry.

Product properties

Total weight
10.4kg/m² with 0.40mm skins (s)
12.8kg/m² with 0.55mm skins (s)
14.8kg/m² with 0.675mm skins (s)
Note: asymmetric skin combinations are possible

Total product thickness (H) 
28mm ± 0.2mm

Thermal properties
Thermal conductivity - K value ( λ ) : 0.099W/mK
Thermal resistance - R value : 0.283m²k/W
 
Core composition
Co-polymer blend of polypropylene with mineral fill for additional strength 

Core specifications (nominal)
Cell size (D)                   8.6mm Ø
Cell Wall Thickness (t)  600µm
Core Thickness             26.9mm
Core Density                 120kg/m³

Skin composition
Pre-finished steel skins
Coatings: 255g/m² Galvalloy™ with a 3 layer 65 micron Colorcoat Prisma^® paint finish

Young's modulus: 207 GPa
Poisson’s ratio: 0.3
Density: 7854 kg/m³

Steel specification
0.55mm S320GD+ZA (320N/mm² min yield stress)
0.40mm S280GD+ZA (280N/mm² min yield stress)
0.675mm S280GD+ZA (280N/mm² min yield stress)

Submit an enquiry.

Coretinium^® can be supplied as either mill width sheets for customers to cut to size themselves or tight tolerance custom sized sheets processed on Tata Steel’s own 5 axis CNC.

Mill width sheets

Steel width: 1240mm +/- 3mm
Core width: 1290mm +/- 10mm
Lengths (28mm thick panel): 2.6m to 10m

Cut to size sheets

Widths from 250mm to 1240mm
Lengths from 300mm to 6250mm
CNC tolerances at +/- 0.5mm

Additional processing

Hole drilling / cut outs
Core stripping on edges
 

Submit an enquiry.

28mm applications

28mm panels made with 600 micron cell walls combines exceptional flexural rigidity with a higher compressive strength than the 25mm, and when supplied with thicker steel skins and anti-slip coatings can be used as a flooring product.

Submit an enquiry.

The following Coretinium^® downloads are available: