EN 10278 p (Tolerances)

FLATS Dimensional tolerances
Carbon max 0,20% and
Free cutting steels low C%

width limit deviation
mm mm mm
≤ 18 + 0 – 0,11
> 18 ≤ 30 + 0 – 0,13
> 30 ≤ 50 + 0 – 0,16
> 50 ≤ 80 + 0 – 0,19
> 80 ≤ 100 + 0 – 0,22
> 100 ≤ 150 + 0,50 – 0,50
> 150 ≤ 200 + 1,00 – 1,00
> 200 ≤ 300 + 2,00 – 2,00
> 300 ≤ 400 + 2,50 – 2,50
FLATS Dimensional tolerances Carbon max 0,20% and
Free cutting steels low C%
Carbon > 0,20% and
all steel
thickness limit deviation limit deviation
mm mm mm mm mm
> 3 ≤ 6 + 0 – 0,075 + 0 – 0,15
> 6 ≤ 10 + 0 – 0,090 + 0 – 0,18
> 10 ≤ 18 + 0 – 0,11 + 0 – 0,22
> 18 ≤ 30 + 0 – 0,13 + 0 – 0,26
> 30 ≤ 50 + 0 – 0,16 + 0 – 0,32
> 50 ≤ 60 + 0 – 0,19 + 0 – 0,38
> 60 ≤ 80 + 0 – 0,30 + 0 – 0,60
> 80 ≤ 100 + 0 – 0,35 + 0 – 0,70

FLATS Straightness tolerances






width Steels
C% < 0,25 C% > 0,25 quenched
and tempered
stainless,
bearings, tools
max deviation
for w and t
mm mm/m mm/m mm/m
< 120 1,5 1,5 1,5 w w = width
1,5 2,0 2,0 t t = thickness
≥ 120
w / t < 10
1,5 2,0 2,0 w
2,0 2,5 2,5 t w / t = ratio
≥ 120
w / t ≥ 10
2,0 2,5 2,5 w
2,5 3,0 3,0 t

SQUARES
HEXAGONS
Straightness tolerances



Dimensional tolerances
Steels



h11 – h12
C% < 0,25 C% > 0,25 stainless
dimensions
mm
mm/m mm/m mm/m
≤ 75 1,0 2,0 1,0
> 75 1,5 2,5 1,5
ROUNDS Straightness tolerances



Dimensional tolerances

Steels





C% < 0,25 C% > 0,25 stainless
h9 – h10 – h11 – h12
all the
dimensions
mm/m mm/m mm/m
1,0 1,5 1,0
dimensional inspection shall be carried out as follows

● round bars: not less than 150 mm from the end
● round bars cut to length: not less than 10 mm from the end
● shapes other than round: not less than 25 mm from the end