Properties

Steel coils for laser cutting applications (CLAS) are hot rolled coils produced in specific grades, developed for applications using computer-controlled thermal and mechanical cutting equipment (laser, plasma etc).
 
Two ranges are available: structural and high yield strength steels for cold forming.

All these grades are designed to:

Advantages

Steel coils supplied for laser cutting are virtually free of internal stresses and can therefore be used to produce sheets with guaranteed flatness before, during and after cutting, provided that appropriate decoiling tools and procedures are used. Sheets produced on cutting-to-length lines certified by ArcelorMittal may have guaranteed flatness before, during and after cutting (see data sheet A42).

For thicknesses below 16 mm, steels for laser cutting offer significantly higher laser cutting speeds than those obtained with standard grades and/or conventional cutting processes (plasma, oxy-cutting).

These steels can be hot dip galvanised.

Applications

These grades are particularly suitable for manufacturing complex parts or for improving productivity when parts are to be produced on a small scale.
 
Since 1 July 2013, the Construction Products Regulation (Regulation (EU) No. 305/2011 – CPR) has required that CE marking be affixed to all products delivered in accordance with a harmonised standard (e.g. EN 10025). This CE marking guarantees, for the uses defined in the standard, the properties described in the declaration of performance submitted by the manufacturer.
 
The S235 CLAS AM FCE, S275 CLAS AM FCE and S355 CLAS AM FCE steels in this data sheet comply with this Regulation.

Surface quality

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:

Weldability

Due to their low carbon equivalent value (see table of chemical properties), ArcelorMittal's steel coils for laser cutting applications offer excellent weldability.

Brand correspondence

 
High yield strength steels for cold forming
 EN 10025-2:2004EN 10149-2:2013EN 10111:2008Old brand names
Amstrong® 320MC CLAS AM FCE  S315MC  
Amstrong® 360MC CLAS AM FCE  S355MC Sollaser® 380/Sidlaser® 380/Superlaser 355MC
Amstrong® 420MC CLAS AM FCE  S420MC Sollaser® 440/Sidlaser® 420
Amstrong® 500MC CLAS AM FCE  S500MC  
 
Structural steels
 EN 10025-2:2004EN 10149-2:2013EN 10111:2008Old brand names
S200 CLAS AM FCE   DD12Sollaser® 220/Sidlaser® 220/Superlaser DD12
S240 CLAS AM FCE S235J0  Sollaser® 260/Sidlaser® 240/Superlaser 235
S275 CLAS AM FCE S275J0   
S355 CLAS AM FCE S355J0   

Dimensions

Thickness tolerance
The consistent thickness and reduced internal stresses of these coils 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: 3/4, 1/2 and 1/3 for both mill finish and pickled steels. Contact our commercial teams for stricter tolerances.

Amstrong® grades are delivered with a thickness tolerance of 1/2 EN if a tighter tolerance is not requested.

Flatness tolerance
Since the degree of sheet flatness obtained mainly depends on the uncoiling and levelling process used during laser cutting, we cannot offer any guarantee for coil products supplied.

Dimension tables
The following tables show the dimensions available for ArcelorMittal's coils:

 

Mill finish

Thickness (mm)Min widthAmstrong® 320MC CLAS AM FCEAmstrong® 360MC CLAS AM FCEAmstrong® 420MC CLAS AM FCEAmstrong® 500MC CLAS AM FCES200 CLAS AM FCES240 CLAS AM FCES275 CLAS AM FCES355 CLAS AM FCE
Max widthMax widthMax widthMax widthMax widthMax widthMax widthMax width
2.00 ≤ th < 2.50700140014001400-1630163016301440
2.50 ≤ th < 3.001590150015002000185018301540
3.00 ≤ th < 3.50170016501650203020301800
3.50 ≤ th < 4.001790173016902130213021302130
4.00 ≤ th < 4.50188018801840*
4.50 ≤ th < 5.0020302030
5.00 ≤ th < 10.00213021302130
10.00 ≤ th < 11.002030-2030
11.00 ≤ th < 13.0019301930
13.00 ≤ th < 13.5019301930
13.50 ≤ th < 14.00-
14.00 ≤ th < 15.00-
15.00 ≤ th < 15.50--
15.50 ≤ th < 16.00

* Amstrong® 500MC CLAS AM FCE: only after prior agreement


Pickled coils

Thickness (mm)Min widthAmstrong® 320MC CLAS AM FCEAmstrong® 360MC CLAS AM FCEAmstrong® 420MC CLAS AM FCEAmstrong® 500MC CLAS AM FCES200 CLAS AM FCES240 CLAS AM FCE, S275 CLAS AM FCES355 CLAS AM FCE
Max widthMax widthMax widthMax widthMax widthMax widthMax width
2.00 ≤ th < 2.50600142014001400-163016301440
2.50 ≤ th < 3.00700159015001500200018501540
3.00 ≤ th < 4.00170016001550213020001780
4.00 ≤ th < 5.00188018801830(1540)21302130
5.00 ≤ th < 6.00213021302130
6.00 ≤ th < 7.1515201550
7.15 ≤ th < 8.1515201520-155015501520
8.15 ≤ th < 12.0015201520
12.00 ≤ th < 13.00-

* Amstrong® 500MC CLAS AM FCE: only after prior agreement


Mechanical properties

High yield strength steels for cold forming
 
Direction
Thickness (mm)
Re (MPa)
Rm (MPa)
A80 (%)
A 5.65√So (%)
Bending ratio (th)
KV 0°C (J)
KV -20°C (J)
Amstrong® 320MC CLAS AM FCEL2 - 3320 - 420420 - 500≥ 22≥ 27---
3 - 6-
6 - 14≥ 40
T2 - 3345 - 450435 - 540≥ 21≥ 26≥ 0--
3 - 14-
Amstrong® 360MC CLAS AM FCEL2 - 3360 - 440450 - 530≥ 21----
3 - 6-≥ 26
6 - 16≥ 40
T2 - 3380 - 460460 - 540≥ 20-≥ 0.2--
3 - 16-≥ 25
Amstrong® 420MC CLAS AM FCEL2 - 3420 - 500490 - 590≥ 18----
3 - 6-≥ 23
6 - 14≥ 40
T2 - 3440 - 520500 - 600≥ 17-≥ 0.5--
3 - 14-≥ 22
Amstrong® 500MC CLAS AM FCEL< 2500 - 600570 - 700≥ 15----
2 - 3≥ 16
3 - 6-≥ 19
6 - 10≥ 40
T< 2530 - 630570 - 700≥ 14-≥ 0.6--
2 - 3≥ 15
3 - 6-≥ 18
6 - 10≥ 1
Values in bold: tighter than the standard

Bending ratio is as defined in EN 10149-2:2013: “Bending at 180° minimum mandrel diameter”.

Structural steels
 
Direction
Thickness (mm)
Re (MPa)
Rm (MPa)
A80 (%)
A 5.65√So (%)
Bending ratio (th)
KV 0°C (J)
KV -20°C (J)
S200 CLAS AM FCET2 - 3200 - 310320 - 410≥ 27----
3 - 16200 - 300320 - 400-≥ 32
S240 CLAS AM FCEL6 - 16-----≥ 27-
T2 - 3240 - 320360 - 440≥ 22----
3 - 16---≥ 28
S275 CLAS AM FCEL6 - 16-----≥ 27-
T2 - 2.5≥ 275430 - 580< 16----
2.5 - 3< 17
3 - 16410 - 560-< 21
S355 CLAS AM FCEL6 - 16-----≥ 27-
T2 - 2.5≥ 355510 - 610≥ 15-≥ 1--
2.5 - 3≥ 16
3 - 16490 - 590-≥ 20

Bending ratio: the values of the bending radius are applicable for bend angles ≤ 90º, as proposed in EN 10025-2:2004.



Chemical composition

 
High yield strength steels for cold forming
 
C (%)
Mn (%)
P (%)
S (%)
Si (%)
Al (%)
Cu (%)
Cr (%)
Ni (%)
Nb (%)
Ceq (%)
Galvanisation
Amstrong® 320MC CLAS AM FCE ≤ 0.100 ≤ 1.30 ≤ 0.025 ≤ 0.012 ≤ 0.03 ≥ 0.020 ≤ 0.25 ≤ 0.15 ≤ 0.25 ≤ 0.040 ≤ 0.36 Class 1
Amstrong® 360MC CLAS AM FCE ≤ 0.100 ≤ 1.40 ≤ 0.020 ≤ 0.012 ≤ 0.03 ≥ 0.020 ≤ 0.25 ≤ 0.15 ≤ 0.25 ≤ 0.065 ≤ 0.36 Class 1
Amstrong® 420MC CLAS AM FCE ≤ 0.110 ≤ 1.50 ≤ 0.020 ≤ 0.012 ≤ 0.03 ≥ 0.020 ≤ 0.25 ≤ 0.15 ≤ 0.25 ≤ 0.065 ≤ 0.38 Class 1
Amstrong® 500MC CLAS AM FCE ≤ 0.120 ≤ 1.70 ≤ 0.020 ≤ 0.012 ≤ 0.03 ≥ 0.020 ≤ 0.25 ≤ 0.15 ≤ 0.25 ≤ 0.090 ≤ 0.42 Class 1
 
Structural steels
 
C (%)
Mn (%)
P (%)
S (%)
Si (%)
Al (%)
Cu (%)
Cr (%)
Ni (%)
Nb (%)
Ceq (%)
Galvanisation
S200 CLAS AM FCE ≤ 0.080 ≤ 0.45 ≤ 0.025 ≤ 0.025 ≤ 0.03 ≥ 0.020 - - - - ≤ 0.16 Class 1
S240 CLAS AM FCE ≤ 0.170 ≤ 0.80 ≤ 0.025 ≤ 0.025 ≤ 0.03 ≥ 0.020 ≤ 0.25 - - - ≤ 0.35 Class 1
S275 CLAS AM FCE ≤ 0.180 ≤ 1.30 ≤ 0.025 ≤ 0.025 ≤ 0.03 ≥ 0.020 ≤ 0.25 ≤ 0.15 ≤ 0.25 - ≤ 0.40 Class 1
S355 CLAS AM FCE ≤ 0.200 ≤ 1.60 ≤ 0.025 ≤ 0.012 ≤ 0.03 ≥ 0.020 ≤ 0.25 ≤ 0.15 ≤ 0.25 ≤ 0.060 ≤ 0.45 Class 1


For commercial information (quotations, deliveries, product availability):

For technical questions about these products: flateurope.technical.assistance@arcelormittal.com


All details provided in the ArcelorMittal Flat Carbon Europe S.A. catalogue are for information purposes only. ArcelorMittal Flat Carbon Europe S.A. reserves the right to change its product range at any time without prior notice.