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Flatness tolerances

HOT ROLLED COILS S235JR, DD11 EN 10025/ 10111

Flatness tolerances for grades with specified minimum yield strength of Re ≤ 300 Mpa dims in mm
Nominal thickness t	Nominal width w	Flatness tolerance	Special flatness tolerance
Nominal thickness t	Nominal width w	Flatness tolerance	Special flatness tolerance
t ≤ 2,00	w ≤1200	18	9
	1 200 < w ≤ 1 500	20	10
	w > 1500	25	13
2,00 < t ≤ 25	w ≤1200	15	8
	1 200 < w ≤ 1 500	18	9
	w > 1500	23	12
Source: EN 10151

HOT ROLLED COILS S355J2+N, S355MC EN 10025/ 10149

Flatness tolerances for grades with specified minimum yield strength of 300 Mpa < Re ≤ 900 Mpa dims in mm
Nominal thickness t	Nominal width w	Flatness tolerances class ^a
Nominal thickness t	Nominal width w	B	C
t ≤ 25	w ≤1200	18	23
	1 200 < w ≤ 1 500	23	30
	w > 1500	28	38
Source: EN 10151

QUARTO PLATES S355J2+N EN 10025

Normal flatness tolerance (class N) dims in mm					Special flatness tolerance (class S) dims in mm
Nominal thickness t	Carbon steel type L^a		Carbon steel type H^a		Nominal thickness t	Carbon steel type L^a		Carbon steel type H^a
	Measured length^b					Measured length^b
	1000	2000	1000	2000		1000	2000	1000	2000
3 ≤ t < 5	9	14	12	17	3 ≤ t < 5	9	14	12	17
5 ≤ t < 8	8	12	11	15	5 ≤ t < 8	8	12	11	15
8 ≤ t < 15	7	11	10	14	8 ≤ t < 15	7	11	10	14
15 ≤ t < 25	7	10	10	13	15 ≤ t < 25	7	10	10	13
25 ≤ t < 40	6	9	9	12	25 ≤ t < 40	6	9	9	12
40 ≤ t < 250	5	8	8	12	40 ≤ t < 250	5	8	8	12
250 ≤ t < 400	6	9	9	13	250 ≤ t < 400	6	9	9	13
^aType L: steel with specified minimum yield strength of Re ≤ 460 Mpa, specified minimum yield strength.					^aType L: steel with specified minimum yield strength of Re ≤ 460 Mpa, specified minimum yield strength.
^aType H: steel with specified minimum yield strength of Re > 460 Mpa and all grades of quenched and quenched and tempered products.					^aType H: steel with specified minimum yield strength of Re > 460 Mpa and all grades of quenched and quenched and tempered products.
^bUse 1 000 mm measuring length when wave pitch is ≤ 1 000 mm.					Use 1 000 mm measuring length when wave pitch is ≤ 1 000 mm.
Source: EN 10029					Source: EN 10029

COLD ROLLED COILS DC01 EN 10131

Flatness tolerances for grades with specified minimum yield strength of Re <260 Mpa
Tolerance class	Nominal width w	Nominal thickness Dims in mm
Tolerance class	Nominal width w	t < 0,70	0,7 ≤ t < 1,2	t ≥ 1,2
Normal
	600≤ w< 1200	13	10	8
	1200≤ w< 1500	15	13	11
	w≥1 500	20	19	17
Special (FS)
	600≤ w< 1200	8	6	5
	1200≤ w< 1500	9	8	6
	w≥1 500	12	10	9
	w<1 500	Specific wave height over 200 mm should not equal 1 % of its length.
	w≥1 500	Specific wave height over 200 mm should be smaller than 1,5 % of its length. For edges, the specific wave height over 200 mm should not overpass 2 mm.
Source: EN 10131

HOT DEEP GALVANIZED COILS DX51 D, S350GD EN 10346

Flatness tolerances for grades with specified minimum yield strength of 260 MPa≤ RP0,2< 360 Mpa and for grades DX51D and S550GD
Tolerance class	Nominal width w	Maximum wave height for nominal thickness t Dims in mm
Tolerance class	Nominal width w	t < 0,70	0,7 ≤ t < 0,60	1,6 ≤ t < 3,00	3,00 ≤ t ≤ 6,50
Normal	w≤ 1200	13	10		18
	1200< w≤ 1500	15	13		25
	w>1 500	20	19		28
Special (FS)	w≤ 1200	8	6	5	9
	1200< w≤ 1500	9	8	6	12
	w>1 500	12	10	9	14
Source: EN 10143

Up-grades of slitter line capacity

Best performance of a very narrow stip of cold rolled DC 03 of 17,9x0,4 mm was successfully performed in our steel service center. The second product, a strip of colled rolled DC 01 of 16x1 mm is used for very small and light street furniture. ...

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