Sidma Romania - Steel Service Center

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

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

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 La

Carbon steel type Ha

Nominal thickness
t

Carbon steel type La

Carbon steel type Ha

Measured lengthb

Measured lengthb

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

a Type L: steel with specified minimum yield strength of Re ≤ 460 Mpa, specified minimum yield strength.

a Type L: steel with specified minimum yield strength of Re ≤ 460 Mpa, specified minimum yield strength.

a Type H: steel with specified minimum yield strength of Re > 460 Mpa and all grades of quenched and quenched and tempered products.

a Type H: steel with specified minimum yield strength of Re > 460 Mpa and all grades of quenched and quenched and tempered products.

b Use 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

t < 0,70

0,7 ≤ t < 1,2

t ≥ 1,2

Normal

w<600

7

6

5

600≤ w< 1200

10

8

7

1200≤ w< 1500

12

10

8

w≥1 500

17

15

13

Special (FS)

w<600

4

3

2

600≤ w< 1200

5

4

3

1200≤ w< 1500

6

5

4

w≥1 500

8

7

6

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

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

Sidma Romania - Steel Service Center Str Oxigenului 2, Sat Căldăraru, Comuna Cernica, Jud. Ilfov 077035
Phone: +4 021 20.90.270, Fax: + 4 021 20.90.115
office@sidma.ro

© Copyright 2019 Sidma Romania SRL. All rights reserved. Design & programming Vectorpixel

RO EN