Thermomechanically rolled steels with excellent cold formability

Thermomechanically rolled alform® steels have a low-carbon, fine-grained microstructure. The steel can be stress-relief-annealed between 530 and 580 °C. Annealing above 580 °C is not permitted and would result in diminished yield and tensile strength. Should heat treatment above 580 °C be necessary, please contact our quality control department.

These steel grades comply with all requirements of comparable steels pursuant to EN 10149-2.

Convincing advantages

  • Very good suitability for cutting, punching and forming
  • Very good weldability because of low carbon equivalent

  • Improved properties with narrower limits than those of comparable standard steels

Dimensions and as-delivered condition

Maximum width per thicknessMinimum width 900 mm for hot-rolled steel stripThickness
[mm]
2.0
2.5
3.0
3.5
4.0
6.0
12.0
15.0
alform 280 M1,6201,6201,6201,6201,6201,6201,6201,620
alform 315 M1,6201,6201,6201,6201,6201,6201,6201,620
alform 340 M1,6201,6201,6201,6201,6201,6201,6201,620
alform 355 M1,5001,6201,6201,6201,6201,6201,6201,620
alform 380 M1,5001,6201,6201,6201,6201,6201,6201,620
alform 420 M1,3601,6201,6201,6201,6201,6201,6201,620
alform 460 M1,3601,6201,6201,6201,6201,6201,6201,620
alform 500 M1,2801,4801,6201,6201,6201,6201,6201,500
alform 550 M1,2801,4801,6201,6201,6201,6201,6201,500
alform 600 M1,2501,3801,5001,6201,6201,6201,6201,500
alform 650 M1,2501,3801,5001,6201,6201,6201)1,6201)1,500
alform 700 M1,2501,3801,5001,6201,6201,6201)1,6201)1,500

 

 (Cut-to-length sheets made of hot-rolled strip)

 
Maximum width per thickness
Minimum width 1,500 mm
Thickness 2)
[mm]
max. width
[mm]
max. length
[mm]
Delivery condition
alform plate 355 M8 ≤ 1003,80018,700TM + ACC
alform plate 420 M8 ≤ 1003,80018,700TM + ACC
alform plate 460 M8 ≤ 1003,80018,700TM + ACC
alform plate 500 M8 ≤ 803,80018,700TM + ACC
alform plate 550 M8 ≤ 503,80018,700TM + ACC


(Heavy plates)

1) Available only as cut sheets in unpickled condition.
2) For thickness 8 < 9 mm and widths ≥ 3,450 - 3,800 mm the max. length is 17,000 mm.
    For thickness 9 < 10 mm and widths > 3,650 - 3,800 mm the max. length is 17,000 mm.

TM thermomechanically rolled
ACC accelerated cooled

Additional dimensions upon request.

 
The different production routes for cut-to-length sheets made of hot-rolled steel strip and heavy plate result in specific product advantages that are described in greater detail in the respective data sheets. A special feature of alform plate 700 M and alform 700 ME is their excellent toughness.

Tensile test

Tensile test
Yield strength Reh
[%] min.
Tensile strength Rm
[%] min.
Elongation
[%] min.
[MPa][MPa]A80A5
alform 280 M280 - 400370 - 4702428
alform 315 M315 - 440390 - 4902226
alform 340 M340 - 470420 - 5202024
alform 355 M355 - 480430 - 5302024
alform 380 M380 - 510450 - 5502024
alform 420 M420 - 550480 - 5801822
alform 460 M460 - 590520 - 6401619
alform 500 M500 - 650550 - 6801518
alform 550 M≥ 550
600 - 7401417
alform 600 M≥ 600
650 - 8001316
alform 650 M3)≥ 650
700 - 8501215
alform 700 M3)≥ 700
750 - 9301114


(Cut-to-length sheets made of hot-rolled strip)

 
Tensile test Thickness 4)Yield strength 5) Reh
[%] min.
Tensile strength 5) Rm
[%] min.
Elongation 5)
[%] min.

[mm][MPa][MPa]A5
alform plate 355 M  8 ≤ 16
 > 16 ≤ 40    
 > 40 ≤ 63    
     > 63 ≤ 100      
355
345
335
325
470 - 630
470 - 630
450 - 610
440 - 600 
22
22
22
22
alform plate 420 M   8 ≤ 16
  > 16 ≤ 40    
  > 40 ≤ 63    
        > 63 ≤ 100        
420
400
390
380
520 - 680
520 - 680
500 - 660
480 - 650
19
19
19
19
alform plate 460 M    8 ≤ 16
 > 16 ≤ 40  
 > 40 ≤ 63  
 > 63 ≤ 100
460
440
430
410
540 - 720
540 - 720
530 - 710
510 - 690
17
17
17
17
alform plate 500 M     8 ≤ 30
> 30 ≤ 50
> 50 ≤ 80
500
480
460
570 - 750
550 - 750
550 - 750
16
16
16
alform plate 550 M      8 ≤ 30
> 30 ≤ 50
550
530
600 - 760
570 - 730
16
16


(Heavy plates)

3) The yield strength may be lower by 20 MPa for thickness > 8 mm.
    Test direction: Longitudinal, minimum values for ReH and Rm also apply in cross direction.
    For a non-distinct offset yield strength and in arbitrary cases, an Rp0.2 elongation of A80 applies       
    to thicknesses less than 3 mm and A5 to thicknesses greater than or equal to 3 mm.
4) Larger thicknesses upon request.
5) The tensile test is conducted on transverse test specimens according to EN 10002.

5

Notch impact energy and edging radii

Notch impact energy
Edging radii
Notch impact energy 6) Av
[Joule]
Edging radii 7)
Ri min. at 90° edging
Location of bending edge in direction
of rolling
(s = sheet thickness)
Bending mandrel diameter
BgD min. 
M
Test temperature
- 20 °C
ME 
Test temperature
-40 °C 8)
s < 3 mms 3 - 6 mm
s > 6 mm
Thickness = s
alform 280 M40-0.25 s0.5 s0.8 s0 s
alform 315 M40-0.25 s0.5 s0.8 s0 s
alform 340 M40-0.25 s0.5 s0.8 s0 s
alform 355 M (ME)40270.25 s0.5 s0.8 s0 s
alform 380 M (ME)40270.25 s0.5 s0.8 s0.5 s
alform 420 M (ME)40270.5 s1.0 s1.0 s0.5 s
alform 460 M (ME)40270.5 s1.0 s1.4 s1.0 s
alform 500 M (ME)40270.8 s1.2 s1.6 s1.0 s
alform 550 M (ME)40270.8 s1.2 s1.6 s1.5 s
alform 600 M (ME)40270.8 s1.2 s1.6 s1.5 s
alform 650 M (ME)40270.8 s1.2 s1.6 s1.5 s
alform 700 M (ME)40270.8 s1.2 s1.6 s1.5 s


(Cut-to-length sheets made of hot-rolled strip)

 
Notch impact energy
Edging radii
Notch impact energy 9) Av
[Joule]
Edging radii
Ri min. at 90° edging
Location of bending edge in 
direction of rolling
(s = sheet thickness) 
Thickness
[mm]
Test-direction:
longitudinal
Temperature -50 °C
Test direction: transverse
Temperature
-50 °C
longitudinaltransverse
alform plate 355 M
8 ≤ 10027161.5 s1.0 s
alform plate 420 M
8 ≤ 10027162.0 s1.5 s
alform plate 460 M8 ≤ 10027162.0 s1.5 s
alform plate 500 M8 ≤ 8027163.0 s2.0 s
alform plate 550 M8 ≤ 5027163.0 s2.0 s


(Heavy plates)

6) Av minimum mean value from three samples (ISO-V, longitudinal) as related to full-size specimen    
    (10 x 10 mm).
7) Smallest permissible inside radius at 90° edging, Ri min.
8) Values at -40 °C are guaranteed for limited dimension ranges and material is labeled ME.
9) Notched bar impact bend test pursuant to EN 10045 using longitudinal Charpy-V samples at
   -50 °C. The mean value from the three tests must correspond to the specified requirements. None 
   of the individual values is permitted to lie below 70% of the minimum mean value. At thickness 
   below < 10 mm, Charpy-V specimens are tested in the dimensions of 10 x 7.5 mm. The guaranteed
   value drops proportionally to the cross section of the specimen.