Best laser cutability. Narrowest tolerances. Excellent workability.
The steel grades of the alform laser series are thermomechanically rolled or normalized hot-rolled steels with excellent cold formability and are especially well suited to laser cutting. We supply minimum yield strengths of 180 to 420 MPa.
![](/vasd_assets/var/site/storage/images/_aliases/content_img_large/medien-bibliothek/bilder/portal-alform/bild-laserschnitt/264652-1-ger-DE/Bild-Laserschnitt.jpg)
The alform laser series is characterized by the following:
- Extremely homogeneous surface and internal properties achieved through high degrees of purity with respect to non-metallic inclusions
Minimum inherent sheet stresses to avoid warping during cutting
Optimized laser cutting with regard to cutting speed and grade through limited phosphorus and sulfur content and a maximum silicon content of 0.03%,
Limited flatness tolerances for high-quality cutting
Optimized surface quality achieved by a thin, uniform layer of scale resulting from thermomechanical or normalized rolling
The use of alform® steels has proven successful in applications where extremely precise cuts, burr-free cut edges and parts free of distortion are required.
The advantages of the alform® laser series
![alform-plus-vorteil](/vasd_assets/var/site/storage/images/_aliases/content_img_medium/medien-bibliothek/bilder/portal-alform/tabellen-infografiken-icons/icons/alform-plus/258460-2-ger-DE/alform-plus.jpg)
Best laser cutting quality ensured through implementation of the following:
- Special additional inspections of surface, dimensional tolerances and flatness
Highest cutting speeds with optimum shape of the cut edges as a result of the optimized chemical composition
High degrees of purity with respect to non-metallic inclusions (resulting in vertical cut edges without undercutting)
Homogeneous, uniform secondary scale layer ensuring trouble-free operation in laser cutting units as well as fine and shallow draglines.
Optimized production conditions from the hot-rolling mill and cut-to-length lines to the straightening lines and shearing units (guaranteed flatness deviations of ≤ 3 mm across a length of 1 meter)
Limited tolerances (50% of EN 10051, Tables 3 and 4)
![alform-plus-vorteil](/vasd_assets/var/site/storage/images/_aliases/content_img_medium/medien-bibliothek/bilder/portal-alform/tabellen-infografiken-icons/icons/alform-plus/258460-2-ger-DE/alform-plus.jpg)
Excellent weldability is ensured by the following:
- Large field of welding parameters (processing range)
Cold cracking resistance without preheating
Best mechanical-technological properties in the welded joint equivalent to those in the base material
Excellent formability of the welded joint
Improved tempering resistance in case-hardening and heat-treatable steels
Low tendency toward age hardening
![alform-plus-vorteil](/vasd_assets/var/site/storage/images/_aliases/content_img_medium/medien-bibliothek/bilder/portal-alform/tabellen-infografiken-icons/icons/alform-plus/258460-2-ger-DE/alform-plus.jpg)
Uniform mechanical properties
- The high consistency of mechanical properties in alform® laster steels guarantees smooth automatic material processing.
Delivery specifications
alform® laser is available in both normalized and thermomechanically rolled condition. If it is necessary to heat-treat thermomechanically rolled steels (M series) above 580 °C (e.g., normalizing), this will result in a decrease of the minimum yield strength.
In such a case we would be able to supply normalized-rolled steels (N series), though only up to a minimum yield strength of 380 MPa. (Flame straightening is also possible in thermomechanically rolled steel grades up to 800 °C.)
Dimensions
Thickness [mm] | max. thickness [mm] for alform laser (min. width 900 mm) | ||||
180 N | 200 N 240 N | 380 N | 355 M 380 M | 420 M | |
1.80 - 1.89 | 1,185 | 1,360 | - | 1,050 | - |
1.90 - 1.99 | 1,260 | 1,440 | 1,100 | 1,115 | 1,000 |
2.00 - 2.24 | 1,320 | 1,500 | 1,120 | 1,165 | 1,040 |
2.25 - 2.49 | 1,505 | 1,600 | 1,175 | 1,340 | 1,150 |
2.50 - 2.74 | 1,600 | 1,600 | 1,235 | 1,600 | 1,315 |
2.75 - 2.99 | 1,600 | 1,600 | 1,290 | 1,600 | 1,540 |
3.00 - 3.24 | 1,600 | 1,600 | 1,350 | 1,600 | 1,600 |
3.25 - 3.49 | 1,600 | 1,600 | 1,410 | 1,600 | 1,600 |
3.50 - 3.74 | 1,600 | 1,600 | 1,475 | 1,600 | 1,600 |
3.75 - 4.50 | 1,600 | 1,600 | 1,535 | 1,600 | 1,600 |
4.51 - 12.00 | 1,600 | 1,600 | 1,600 | 1,600 | 1,600 |
(Cut-to-length sheets made of hot-rolled strip)
Tensile test
Tensile test | Yield strength Reh [%] min. | Yield strength Rp0,2 [%] min. | Tensile strength Rm [%] min. | Elongation [%] min. | |
[MPa] | [MPa] | [Mpa] | A80 | A5 | |
laser 180 N | 180 - 290 | - | 280 - 360 | 28 | 34 |
laser 200 N | 200 - 320 | - | 320 - 400 | 26 | 32 |
laser 240 N | 240 - 360 | - | 360 - 470 | 23 | 28 |
laser 380 N | 380 - 520 | - | 510 - 610 | 19 | 24 |
laser 355 M | 355 - 480 | - | 430 - 530 | 20 | 24 |
laser 380 M | 380 - 510 | - | 450 - 550 | 20 | 24 |
laser 420 M | 420 - 550 | - | 480 - 580 | 18 | 22 |
(Cut-to-length sheets made of hot-rolled strip)
Notch impact energy and edging radii
Notch impact energy Edging radii | Notch impact energy 1) ISO-V / 20 °C [J] min. | Edging radii 2) Ri min. at 90° edging Location of bending edge in direction of rolling (s = sheet thickness) | ||
s < 3 mm | s 3 - 6 mm | s > 6 mm | ||
alform laser 180 N | 3) | 0.25 s | 0.5 s | 1.0 s |
alform laser 200 N | 3) | 0.25 s | 0.5 s | 1.0 s |
alform laser 240 N | 27 | 0.25 s | 0.5 s | 1.0 s |
alform laser 380 N | 404) | 0.25 s | 0.5 s | 1.0 s |
alform laser 355 M | 40 | 0.25 s | 0.5 s | 0.8 s |
alfom laser 380 M | 40 | 0.25 s | 0.5 s | 0.8 s |
alform laser 420 M | 40 | 0.50 s | 1.0 s | 1.0 s |
(Cut-to-length sheets made of hot-rolled strip)
1) Av minimum mean value from three samples (ISO-V, longitudinal) as related to full-size specimen
(10 x 10 mm). Upon agreement, notch impact energy is determined for thickness of 6 mm and
higher. The value indicated is the mean value of three samples of 10 x 10 mm.
2) Smallest permissible inside radius at 90° edging, Ri min.
3) No guarantee.
4) A minimum value of 24 J is guaranteed for thickness higher than 8 mm.