SSAB Form Tube 420

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General Product Description

Form Tube 420 is high-strength formable precision tube. It has 15% higher elongation values and very narrow tolerances compared with competing products. Available in circular, rectangular, square and special shapes, it comes with different coating and surface options including cold rolled, galvanized, galvannealed and galfan. Customized shapes and other tailoring options are available upon request. Typically uses include light engineering, where formability, uniform quality, different surface options and usability are important.

Dimension Range

Shapes
Shapes
Circular (mmin)
Dimensions
16 - 88.90.63 - 3.50
Shapes
Shapes
Square (mmin)
Dimensions
19x19 - 70x70
Shapes
Shapes
Rectangular (mmin)
Dimensions
25x15 - 100x40
Shapes
Shapes
Wall thickness (mmin)
Dimensions
0.9 - 3.00.04 - 0.12
Shapes
Shapes
Mill length (mm)
Dimensions
6000

SSAB Form Tube 420 is available in circular, square and rectangular shapes.

Other shapes, sizes and lengths are available upon request.

Circular Dimensions

Outer diameter (mmin)
Outer diameter (mmin)
160.63
0.9 mm (kg/m)
0.335
1.0 mm (kg/m)
0.370
1.25 mm (kg/m)
0.455
1.5 mm (kg/m)
0.536
2.0 mm (kg/m)
0.691 1)
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Outer diameter (mmin)
Outer diameter (mmin)
180.71
0.9 mm (kg/m)
0.380
1.0 mm (kg/m)
0.419
1.25 mm (kg/m)
0.516
1.5 mm (kg/m)
0.610
2.0 mm (kg/m)
0.789
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Outer diameter (mmin)
Outer diameter (mmin)
190.75
0.9 mm (kg/m)
0.402
1.0 mm (kg/m)
0.444
1.25 mm (kg/m)
0.547
1.5 mm (kg/m)
0.647
2.0 mm (kg/m)
0.838
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Outer diameter (mmin)
Outer diameter (mmin)
200.79
0.9 mm (kg/m)
0.424
1.0 mm (kg/m)
0.469
1.25 mm (kg/m)
0.578
1.5 mm (kg/m)
0.684
2.0 mm (kg/m)
0.888
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Outer diameter (mmin)
Outer diameter (mmin)
220.87
0.9 mm (kg/m)
0.468
1.0 mm (kg/m)
0.518
1.25 mm (kg/m)
0.640
1.5 mm (kg/m)
0.758
2.0 mm (kg/m)
0.986
2.5 mm (kg/m)
1.20 1)
3.0 mm (kg/m)
—
Outer diameter (mmin)
Outer diameter (mmin)
250.98
0.9 mm (kg/m)
0.535
1.0 mm (kg/m)
0.592
1.25 mm (kg/m)
0.732
1.5 mm (kg/m)
0.869
2.0 mm (kg/m)
1.13
2.5 mm (kg/m)
1.39 1)
3.0 mm (kg/m)
1.63 1)
Outer diameter (mmin)
Outer diameter (mmin)
281.1
0.9 mm (kg/m)
0.601
1.0 mm (kg/m)
0.666
1.25 mm (kg/m)
0.825
1.5 mm (kg/m)
0.980
2.0 mm (kg/m)
1.28
2.5 mm (kg/m)
1.57
3.0 mm (kg/m)
1.85
Outer diameter (mmin)
Outer diameter (mmin)
301.2
0.9 mm (kg/m)
0.646
1.0 mm (kg/m)
0.715
1.25 mm (kg/m)
0.886
1.5 mm (kg/m)
1.05
2.0 mm (kg/m)
1.38
2.5 mm (kg/m)
1.70
3.0 mm (kg/m)
2.00
Outer diameter (mmin)
Outer diameter (mmin)
321.3
0.9 mm (kg/m)
—
1.0 mm (kg/m)
0.765
1.25 mm (kg/m)
0.948
1.5 mm (kg/m)
1.13
2.0 mm (kg/m)
1.48
2.5 mm (kg/m)
1.82
3.0 mm (kg/m)
2.15
Outer diameter (mmin)
Outer diameter (mmin)
351.4
0.9 mm (kg/m)
—
1.0 mm (kg/m)
0.838
1.25 mm (kg/m)
1.04
1.5 mm (kg/m)
1.24
2.0 mm (kg/m)
1.63
2.5 mm (kg/m)
2.00
3.0 mm (kg/m)
2.37
Outer diameter (mmin)
Outer diameter (mmin)
381.5
0.9 mm (kg/m)
—
1.0 mm (kg/m)
0.912
1.25 mm (kg/m)
1.13
1.5 mm (kg/m)
1.35
2.0 mm (kg/m)
1.78
2.5 mm (kg/m)
2.19
3.0 mm (kg/m)
2.59
Outer diameter (mmin)
Outer diameter (mmin)
401.6
0.9 mm (kg/m)
—
1.0 mm (kg/m)
0.962
1.25 mm (kg/m)
1.20
1.5 mm (kg/m)
1.42
2.0 mm (kg/m)
1.87
2.5 mm (kg/m)
2.31
3.0 mm (kg/m)
2.74
Outer diameter (mmin)
Outer diameter (mmin)
411.6
0.9 mm (kg/m)
—
1.0 mm (kg/m)
0.990
1.25 mm (kg/m)
1.22
1.5 mm (kg/m)
1.46
2.0 mm (kg/m)
1.92
2.5 mm (kg/m)
2.37
3.0 mm (kg/m)
2.81
Outer diameter (mmin)
Outer diameter (mmin)
44.51.75
0.9 mm (kg/m)
—
1.0 mm (kg/m)
1.07
1.25 mm (kg/m)
1.33
1.5 mm (kg/m)
1.59
2.0 mm (kg/m)
2.10
2.5 mm (kg/m)
2.59
3.0 mm (kg/m)
3.07
Outer diameter (mmin)
Outer diameter (mmin)
481.9
0.9 mm (kg/m)
—
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.44
1.5 mm (kg/m)
1.72
2.0 mm (kg/m)
2.27
2.5 mm (kg/m)
2.81
3.0 mm (kg/m)
3.33
Outer diameter (mmin)
Outer diameter (mmin)
502.0
0.9 mm (kg/m)
—
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.50
1.5 mm (kg/m)
1.79
2.0 mm (kg/m)
2.37
2.5 mm (kg/m)
2.93
3.0 mm (kg/m)
3.48
Outer diameter (mmin)
Outer diameter (mmin)
552.2
0.9 mm (kg/m)
—
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.66
1.5 mm (kg/m)
1.98
2.0 mm (kg/m)
2.61
2.5 mm (kg/m)
3.24
3.0 mm (kg/m)
3.85
Outer diameter (mmin)
Outer diameter (mmin)
572.2
0.9 mm (kg/m)
—
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.72
1.5 mm (kg/m)
2.05
2.0 mm (kg/m)
2.71
2.5 mm (kg/m)
3.36
3.0 mm (kg/m)
4.00
Outer diameter (mmin)
Outer diameter (mmin)
602.4
0.9 mm (kg/m)
—
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.81
1.5 mm (kg/m)
2.16
2.0 mm (kg/m)
2.86
2.5 mm (kg/m)
3.55
3.0 mm (kg/m)
4.22
Outer diameter (mmin)
Outer diameter (mmin)
76.13.00
0.9 mm (kg/m)
—
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
2.76
2.0 mm (kg/m)
3.65
2.5 mm (kg/m)
4.54
3.0 mm (kg/m)
5.41
Outer diameter (mmin)
Outer diameter (mmin)
88.93.50
0.9 mm (kg/m)
—
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
—
2.0 mm (kg/m)
4.29
2.5 mm (kg/m)
5.33
3.0 mm (kg/m)
6.36

1) Elongation A-value according to +CR2, 12%.

Square Dimensions

Height x Width (mm)
Height x Width (mm)
19 x 19
1.0 mm (kg/m)
0.564
1.25 mm (kg/m)
0.694
1.5 mm (kg/m)
0.820
2.0 mm (kg/m)
1.06 1)
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
20 x 20
1.0 mm (kg/m)
0.595
1.25 mm (kg/m)
0.733
1.5 mm (kg/m)
0.868
2.0 mm (kg/m)
1.12 1)
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
25 x 25
1.0 mm (kg/m)
0.752
1.25 mm (kg/m)
0.930
1.5 mm (kg/m)
1.10
2.0 mm (kg/m)
1.44
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
30 x 30
1.0 mm (kg/m)
0.909
1.25 mm (kg/m)
1.13
1.5 mm (kg/m)
1.34
2.0 mm (kg/m)
1.75
2.5 mm (kg/m)
2.15
3.0 mm (kg/m)
2.39
Height x Width (mm)
Height x Width (mm)
32 x 32
1.0 mm (kg/m)
0.972
1.25 mm (kg/m)
1.20
1.5 mm (kg/m)
1.43
2.0 mm (kg/m)
1.88
2.5 mm (kg/m)
2.31
3.0 mm (kg/m)
2.58
Height x Width (mm)
Height x Width (mm)
35 x 35
1.0 mm (kg/m)
1.07
1.25 mm (kg/m)
1.32
1.5 mm (kg/m)
1.57
2.0 mm (kg/m)
2.07
2.5 mm (kg/m)
2.54
3.0 mm (kg/m)
2.86
Height x Width (mm)
Height x Width (mm)
40 x 40
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.52
1.5 mm (kg/m)
1.81
2.0 mm (kg/m)
2.38
2.5 mm (kg/m)
2.93
3.0 mm (kg/m)
3.33
Height x Width (mm)
Height x Width (mm)
50 x 50
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.91
1.5 mm (kg/m)
2.28
2.0 mm (kg/m)
3.01
2.5 mm (kg/m)
3.72
3.0 mm (kg/m)
4.28
Height x Width (mm)
Height x Width (mm)
60 x 60
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
2.75
2.0 mm (kg/m)
3.64
2.5 mm (kg/m)
4.50
3.0 mm (kg/m)
5.22
Height x Width (mm)
Height x Width (mm)
70 x 70
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
—
2.0 mm (kg/m)
4.26
2.5 mm (kg/m)
5.29
3.0 mm (kg/m)
6.16

1) Elongation A-value according to +CR2, 12%.

Rectangular Dimensions

Height x Width (mm)
Height x Width (mm)
25 x 15
1.0 mm (kg/m)
0.595
1.25 mm (kg/m)
0.733
1.5 mm (kg/m)
0.868
2.0 mm (kg/m)
1.12 1)
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
30 x 10
1.0 mm (kg/m)
0.595
1.25 mm (kg/m)
0.733
1.5 mm (kg/m)
0.868
2.0 mm (kg/m)
1.12
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
30 x 15
1.0 mm (kg/m)
0.673
1.25 mm (kg/m)
0.831
1.5 mm (kg/m)
0.985
2.0 mm (kg/m)
1.28
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
30 x 20
1.0 mm (kg/m)
0.752
1.25 mm (kg/m)
0.930
1.5 mm (kg/m)
1.10
2.0 mm (kg/m)
1.44
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
30 x 25
1.0 mm (kg/m)
0.830
1.25 mm (kg/m)
1.03
1.5 mm (kg/m)
1.22
2.0 mm (kg/m)
1.59
2.5 mm (kg/m)
1.95
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
35 x 15
1.0 mm (kg/m)
0.752
1.25 mm (kg/m)
0.930
1.5 mm (kg/m)
1.10
2.0 mm (kg/m)
1.44
2.5 mm (kg/m)
—
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
35 x 20
1.0 mm (kg/m)
0.830
1.25 mm (kg/m)
1.03
1.5 mm (kg/m)
1.22
2.0 mm (kg/m)
1.59
2.5 mm (kg/m)
1.95
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
40 x 20
1.0 mm (kg/m)
0.909
1.25 mm (kg/m)
1.13
1.5 mm (kg/m)
1.34
2.0 mm (kg/m)
1.75
2.5 mm (kg/m)
2.15
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
40 x 25
1.0 mm (kg/m)
0.987
1.25 mm (kg/m)
1.22
1.5 mm (kg/m)
1.46
2.0 mm (kg/m)
1.91
2.5 mm (kg/m)
2.34
3.0 mm (kg/m)
—
Height x Width (mm)
Height x Width (mm)
40 x 30
1.0 mm (kg/m)
1.07
1.25 mm (kg/m)
1.32
1.5 mm (kg/m)
1.57
2.0 mm (kg/m)
2.07
2.5 mm (kg/m)
2.54
3.0 mm (kg/m)
2.86
Height x Width (mm)
Height x Width (mm)
50 x 20
1.0 mm (kg/m)
1.07
1.25 mm (kg/m)
1.32
1.5 mm (kg/m)
1.57
2.0 mm (kg/m)
2.07
2.5 mm (kg/m)
2.54
3.0 mm (kg/m)
2.86
Height x Width (mm)
Height x Width (mm)
50 x 25
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.42
1.5 mm (kg/m)
1.69
2.0 mm (kg/m)
2.22
2.5 mm (kg/m)
2.74
3.0 mm (kg/m)
3.10
Height x Width (mm)
Height x Width (mm)
50 x 30
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.52
1.5 mm (kg/m)
1.81
2.0 mm (kg/m)
2.38
2.5 mm (kg/m)
2.93
3.0 mm (kg/m)
3.33
Height x Width (mm)
Height x Width (mm)
50 x 40
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.71
1.5 mm (kg/m)
2.05
2.0 mm (kg/m)
2.69
2.5 mm (kg/m)
3.33
3.0 mm (kg/m)
3.80
Height x Width (mm)
Height x Width (mm)
60 x 20
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.52
1.5 mm (kg/m)
1.81
2.0 mm (kg/m)
2.38
2.5 mm (kg/m)
2.93
3.0 mm (kg/m)
3.33
Height x Width (mm)
Height x Width (mm)
60 x 30
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.71
1.5 mm (kg/m)
2.05
2.0 mm (kg/m)
2.69
2.5 mm (kg/m)
3.33
3.0 mm (kg/m)
3.80
Height x Width (mm)
Height x Width (mm)
60 x 40
1.0 mm (kg/m)
—
1.25 mm (kg/m)
1.91
1.5 mm (kg/m)
2.28
2.0 mm (kg/m)
3.01
2.5 mm (kg/m)
3.72
3.0 mm (kg/m)
4.28
Height x Width (mm)
Height x Width (mm)
70 x 25
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
2.16
2.0 mm (kg/m)
2.85
2.5 mm (kg/m)
3.52
3.0 mm (kg/m)
4.04
Height x Width (mm)
Height x Width (mm)
70 x 30
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
2.28
2.0 mm (kg/m)
3.01
2.5 mm (kg/m)
3.72
3.0 mm (kg/m)
4.28
Height x Width (mm)
Height x Width (mm)
70 x 50
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
2.75
2.0 mm (kg/m)
3.64
2.5 mm (kg/m)
4.50
3.0 mm (kg/m)
5.22
Height x Width (mm)
Height x Width (mm)
80 x 20
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
2.28
2.0 mm (kg/m)
3.01
2.5 mm (kg/m)
3.72
3.0 mm (kg/m)
4.28
Height x Width (mm)
Height x Width (mm)
80 x 30
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
2.52
2.0 mm (kg/m)
3.32
2.5 mm (kg/m)
4.11
3.0 mm (kg/m)
4.74
Height x Width (mm)
Height x Width (mm)
80 x 40
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
2.75
2.0 mm (kg/m)
3.64
2.5 mm (kg/m)
4.50
3.0 mm (kg/m)
5.22
Height x Width (mm)
Height x Width (mm)
80 x 60
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
—
2.0 mm (kg/m)
4.26
2.5 mm (kg/m)
5.29
3.0 mm (kg/m)
6.16
Height x Width (mm)
Height x Width (mm)
100 x 40
1.0 mm (kg/m)
—
1.25 mm (kg/m)
—
1.5 mm (kg/m)
—
2.0 mm (kg/m)
4.26
2.5 mm (kg/m)
5.29
3.0 mm (kg/m)
6.16

1) Elongation A-value according to +CR2, 12%.

Mechanical Properties

Yield strength Rp0.2
(min MPa)
Yield strength Rp0.2
(min MPa)
420
Tensile strength Rm
(min MPa)
490
Elongation A
(min %)
14

Mechanical properties meet or exceed the requirements of EN 10305 (+CR2).

Chemical Composition (ladle analysis)

C
(max %)
C
(max %)
0.12
Si 1)
(max %)
0.50
Mn
(max %)
1.70
P 1)
(max %)
0.020 2)
S 2)
(max %)
0.020
Altot 3)
(min %)
0.020

Chemical composition meets or exceeds the requirements of EN 10305.

If other chemical elements such as Ti, Nb or V are used, the content of these elements are reported in the inspection document.

1) SSAB Form Tube H grade is suitable for high quality hot-dip galvanizing (Si < 0.03%, Si +2.5P < 0.06%)

2) Low level of impurities ensure excellent formability and weldability

3) This requirement is not applicable provided the steel contains a sufficient amount of other nitrogen binding elements, such as Ti, Nb or V.

Tolerances

Tolerance Circular

Characteristic
Characteristic
Outside diameter (D) (1
D < 20 mm
20 ≤ D < 32 mm
32 ≤ D < 44 mm
44 ≤ D < 55 mm
55 ≤ D < 70 mm
70 ≤ D < 80 mm
80 ≤ D < 100 mm
Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

±0.12 mm
±0.15 mm
±0.20 mm
±0.25 mm
±0.30 mm
±0.35 mm
±0.40 mm
Characteristic
Characteristic
Out-of-roundness
Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3
The diameter tolerances include the out-of-roundness
Characteristic
Characteristic
Thickness (T)
Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3
T ≤ 1.5 mm: ±0.15 mm
T >1.5 mm: ±10% of nominal thickness or ±0.35 mm whichever is the smaller
Characteristic
Characteristic
Straightness
Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3
Maximum 0.15% of measured length
Characteristic
Characteristic
Height of internal weld bead, g;
Bead removed
Bead not removed
Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

g ≤ 0.3 mm
g < 0.6 mm, when T ≤ 1.5 mm
g < 0.4 x T, when 1.5 mm < T ≤ 3.0 mm
Characteristic
Characteristic
Mill length
Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3
0/+50 mm, standard length 6000 mm
Characteristic
Characteristic
Exact length, single cutting
Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3
Agreed at the time of enquiry and order
Characteristic
Characteristic
Exact length, bundle cutting
Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3
Agreed at the time of enquiry and order

1)For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances.

Tolerance Square

Characteristic
Characteristic
Outside dimensions (H) and (B), longer side1)
H < 25 mm
25 ≤ H < 40 mm
40 ≤ H < 60 mm
60≤ H < 70 mm
70 ≤ H < 80 mm
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

±0.20 mm
±0.25 mm
±0.30 mm
±0.35 mm
±0.40 mm
Characteristic
Characteristic
Side concavity and convexity
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
Included in outside dimension tolerance
Characteristic
Characteristic
Thickness (T)
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
T≤ 1.5 mm: ±0.15 mm
T >1.5 mm: ±10% of nominal thickness or ±0.35 mm whichever is the smaller
Characteristic
Characteristic
Straightness
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
Maximum 0.15% of measured tube length when shorter side length > 30 mm
Maximum 0.25% of measured tube length when the shorter side length ≤ 30 mm
Characteristic
Characteristic
Location of weld seam from the centre line
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
On narrow side for square and rectangular, optionally on wide side. On wide side for flat oval and ellipse. ± 10% of side length or ± 3 mm, whichever is greater.
Characteristic
Characteristic
Height of internal weld bead, g;
Bead removed
Bead not removed
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

g ≤ 0.3 mm
g < 0.6 mm, when T ≤ 1.5 mm
g < 0.4 x T, when 1.5 mm < T ≤ 3.0 mm
Characteristic
Characteristic
Squareness of side
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
90° ±1°
Characteristic
Characteristic
Corner profile
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
R < 1.5 x T, when T ≤ 2.5 mm
R < 2.2 x T, when T > 2.5 mm
Characteristic
Characteristic
Twist (V)
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
V ≤ 3 mm for B and H ≤ 30 mm
V ≤ B/10 or ≤ H/10 for B or H > 30 mm
Characteristic
Characteristic
Mill length
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
0/+50 mm, standard length 6000 mm
Characteristic
Characteristic
Exact length, single cutting
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
Agreed at the time of enquiry and order
Characteristic
Characteristic
Exact length, bundle cutting
Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
Agreed at the time of enquiry and order

1)For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances.

Tolerance Rectangular

Characteristic
Characteristic
Outside dimensions (H) and (B), longer side1)
H < 25 mm
25 ≤ H < 40 mm
40 ≤ H < 60 mm
60≤ H < 70 mm
70 ≤ H < 80 mm
80 ≤ H < 90 mm
90 ≤ H < 100 mm
100 ≤ H < 120 mm
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

±0.20 mm
±0.25 mm
±0.30 mm
±0.35 mm
±0.40 mm
±0.50 mm
±0.60 mm
±0.65 mm
Characteristic
Characteristic
Side concavity and convexity
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
Included in outside dimension tolerance
Characteristic
Characteristic
Thickness (T)
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
T≤ 1.5 mm: ±0.15 mm
T >1.5 mm: ±10% of nominal thickness or ±0.35 mm whichever is the smaller
Characteristic
Characteristic
Straightness
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
Maximum 0.15% of measured tube length when shorter side length > 30 mm
Maximum 0.25% of measured tube length when the shorter side length ≤ 30 mm
Characteristic
Characteristic
Location of weld seam from the centre line
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
On narrow side for square and rectangular, optionally on wide side. On wide side for flat oval and ellipse. ± 10% of side length or ± 3 mm, whichever is greater.
Characteristic
Characteristic
Height of internal weld bead, g;
Bead removed
Bead not removed
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

g ≤ 0.3 mm
g < 0.6 mm, when T ≤ 1.5 mm
g < 0.4 x T, when 1.5 mm < T ≤ 3.0 mm
Characteristic
Characteristic
Squareness of side
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
90° ±1°
Characteristic
Characteristic
Corner profile
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
R < 1.5 x T, when T ≤ 2.5 mm
R < 2.2 x T, when T > 2.5 mm
Characteristic
Characteristic
Twist (V)
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
V ≤ 3 mm for B and H ≤ 30 mm
V ≤ B/10 or ≤ H/10 for B or H > 30 mm
Characteristic
Characteristic
Mill length
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
0/+50 mm, standard length 6000 mm
Characteristic
Characteristic
Exact length, single cutting
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
Agreed at the time of enquiry and order
Characteristic
Characteristic
Exact length, bundle cutting
Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5
Agreed at the time of enquiry and order

1)For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances.

Surface designation and general usability

Designation
Designation
C
Definition
Cold rolled
Usability
Suitable for painting and chromium plating
Designation
Designation
H
Definition
Hot rolled and pickled
Usability
Suitable for painting and hot-dip galvanizing
Designation
Designation
Z
Definition
Zinc coated (zinc 99%)
Usability
Suitable when corrosion resistance is required
Designation
Designation
ZA
Definition
Galfan coated (zinc 95%-aluminium 5%)
Usability
Suitable when corrosion resistance and demanding forming are required
Designation
Designation
ZF
Definition
Galvannealed coated (zinc 90%-iron 10%)
Usability
Suitable when corrosion resistance and paintability are required

Surface is slightly oiled to protect it from corrosion during transportation and short-term storage. By request, tubes can be delivered dry, however in that case SSAB will not be responsible for any possible rust.

Surface roughness, Ra

Designation
Designation
C
Ra value
< 0.6 µm
Designation
Designation
H
Ra value
< 2.0 µm

Different metal coatings and minimum coating mass

Coating thickness 1)(µm)
Coating thickness 1)(µm)
7
Zinc (Z) 2) (g/m2)
Z100
Galfan (ZA) 2) (g/m2)
—
Galvannealed (ZF) 2) (g/m2)
ZF100
Coating thickness 1)(µm)
Coating thickness 1)(µm)
8
Zinc (Z) 2) (g/m2)
—
Galfan (ZA) 2) (g/m2)
—
Galvannealed (ZF) 2) (g/m2)
ZF120
Coating thickness 1)(µm)
Coating thickness 1)(µm)
10
Zinc (Z) 2) (g/m2)
Z140
Galfan (ZA) 2) (g/m2)
ZA130
Galvannealed (ZF) 2) (g/m2)
ZF140
Coating thickness 1)(µm)
Coating thickness 1)(µm)
20
Zinc (Z) 2) (g/m2)
Z275
Galfan (ZA) 2) (g/m2)
ZA255
Galvannealed (ZF) 2) (g/m2)
—
Coating thickness 1)(µm)
Coating thickness 1)(µm)
25
Zinc (Z) 2) (g/m2)
Z350
Galfan (ZA) 2) (g/m2)
ZA300
Galvannealed (ZF) 2) (g/m2)
—
Coating thickness 1)(µm)
Coating thickness 1)(µm)
32
Zinc (Z) 2) (g/m2)
Z450
Galfan (ZA) 2) (g/m2)
—
Galvannealed (ZF) 2) (g/m2)
—
Coating thickness 1)(µm)
Coating thickness 1)(µm)
42
Zinc (Z) 2) (g/m2)
Z600
Galfan (ZA) 2) (g/m2)
—
Galvannealed (ZF) 2) (g/m2)
—

Galfan coating ZA255 by SSAB has been granted a C3 15 (years) certification by RISE, Research Institute of Sweden AB.

1) Theoretical guidance values for coating thickness per surface.

2) Minimum coating mass - g/m2 refers the total weight of coatings on both sides of a 1 m2 plate.

Indicative specification for proper coating selection

Coating type
Coating type
Z
Coating mass (g/m2)
100
Coating life - marine (year)
10
Properties
Good weldability and formability with tolerable corrosion resistance.
Coating type
Coating type
Z
Coating mass (g/m2)
275
Coating life - marine (year)
25
Properties
Good combination of corrosion resistance and usability.
Coating type
Coating type
Z
Coating mass (g/m2)
350
Coating life - marine (year)
30
Properties
Excellent corrosion resistance.
Coating type
Coating type
Z
Coating mass (g/m2)
450
Coating life - marine (year)
40
Properties
Excellent corrosion resistance.
Coating type
Coating type
Z
Coating mass (g/m2)
600
Coating life - marine (year)
60
Properties
Superior corrosion resistance.
Coating type
Coating type
ZA
Coating mass (g/m2)
130
Coating life - marine (year)
40
Properties
Excellent corrosion resistance and formability.
Coating type
Coating type
ZA
Coating mass (g/m2)
255
Coating life - marine (year)
80
Properties
Superior corrosion resistance in marine condition.
Coating type
Coating type
ZA
Coating mass (g/m2)
300
Coating life - marine (year)
95
Properties
Superior corrosion resistance in marine condition.
Coating type
Coating type
ZF
Coating mass (g/m2)
100
Coating life - marine (year)
15
Properties
Superior paint adhesion and corrosion reistance as painted. Weldability in same level as cold rolled material under proper welding conditions.
Coating type
Coating type
ZF
Coating mass (g/m2)
120
Coating life - marine (year)
17
Properties
Superior paint adhesion and corrosion reistance as painted. Weldability in same level as cold rolled material under proper welding conditions.
Coating type
Coating type
ZF
Coating mass (g/m2)
140
Coating life - marine (year)
20
Properties
Superior paint adhesion and corrosion reistance as painted. Weldability in same level as cold rolled material under proper welding conditions.

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