The Amstrong^® Laser sheet range comprises hot rolled steel grades developed for applications using computer-controlled thermal and mechanical cutting equipment (laser, plasma etc). The sheets are cut to length from ArcelorMittal coils for laser applications on certified lines that are able to reduce internal stresses and improve flatness before, during and after cutting.
 
All these grades are designed to:

• Give improved productivity, quality and consistency with laser cutting
• Meet the most stringent flatness requirements after cutting

Amstrong^® Laser sheets are virtually free of internal stresses and can therefore be used to produce sheets with guaranteed flatness before, during and after cutting.

These sheets are particularly suitable for manufacturing complex parts or for improving productivity.

Laser cutting speed largely depends on surface homogeneity and reflectivity. To improve productivity for our clients, ArcelorMittal has developed several surface finishes compatible with laser cutting:

• Mill finish:
• Surface appearance: only A (unexposed) is available
• Surface cleanliness: Amstrong^® Laser sheets are delivered with an improved surface finish. Contact our commercial teams for further information.
• Pickled:
  ArcelorMittal's hydrochloric acid pickling process produces a clean, more favourable surface for laser cutting than that produced by sulphuric acid pickling.
• Surface appearance: A (unexposed) and B (exposed) are available
• Protection:
• Protective oil may be applied
• Easyfilm^® HPE is available. It offers more uniform dry surface protection than oil and favourably reduces the reflectivity of the steel. Moreover, since no oil is used, workplace floors are cleaner and safer.
  For more information, see data sheet A80.

With the ArcelorMittal steels used to produce these sheets for laser cutting applications, excellent weldability is expected.

These sheets may be delivered from coils produced in the different grades shown below.

High Strength Low Alloy steels

Structural steels

Thickness tolerance
The consistent thickness and reduced internal stresses make it possible to operate laser cutting machines continuously by lowering the breakdown risk and the frequency of laser cutting head breakage. This allows the use of fully automated loading and discharging systems.
 
The following thickness tolerances (EN 10051:2010) are available: 1/2 or 1/3 for both mill finish and pickled steels.

Flatness tolerance 
Two products are available, depending on the level of guarantee required:

• Laser Classic
• Laser Premium

All the types of guarantee available are summarised in the following table:

 
Dimension tables
Cut-to-length sheets will be produced from coils of steels for laser cutting applications (see data sheet A40) and/or from steels in the Amstrong^® range (see data sheets A20 – A22). Since the dimensions available are linked to the cutting line, contact our commercial teams for further information on the sheets produced on the line in question.

See guarantees on coils in A20 – A22 – A40 data sheets

See guarantees on coils in A20 – A22 – A40 data sheets