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Machining Allowance and Tolerances Hot-rolled products EN 10060: 2004
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Allowances hereunder indicated are valid for length under 1000 mm, for upper lengths you need to consider also the straightness deviation according to norms.
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Lucefin Group Machining allowance min.
advised for rounds |
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(
b
) mm after |
≤ 10 |
> 10 ≤ 30 |
> 30 ≤ 40 |
> 40 ≤ 60 |
> 60 ≤ 80 |
> 80 ≤ 100 |
> 100 ≤ 140 |
> 140 ≤ 150 |
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machining |
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allowance |
2,0 |
2,5 |
3,0 |
3,5 |
4,0 |
5,0 |
6,0 |
7,0 |
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(
2 a
) |
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(
b
) mm after |
> 150 ≤ 220 |
> 220 ≤ 250 |
> 250 ≤ 280 |
> 280 ≤ 300 |
> 300 ≤ 320 |
> 320 ≤ 360 |
- |
- |
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machining |
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allowances |
10,0 |
13,0 |
18,0 |
20,0 |
22,0 |
24,0 |
- |
- |
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(
2 a
) |
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Example: for finished round 75 mm, you have to order 79 mm. If this size is not in the normal range of production, you'll have to order an 80 mm bar |
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Dimensional tolerances
EN 10060
: 2004 |
Straightness
EN 10060
: 2004 |
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diameters |
Limit deviation |
Limit deviation |
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mm |
normal
mm |
precision
mm |
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10 - 12 |
± 0,4 |
± 0,15 |
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13 - 15 |
± 0,4 |
± 0,20 |
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16 - 22 |
± 0,5 |
± 0,20 |
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24 - 25 |
± 0,5 |
± 0,25 |
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26 - 30 |
± 0,6 |
± 0,25 |
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32 - 35 |
± 0,6 |
± 0,30 |
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36 - 40 |
± 0,8 |
± 0,30 |
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42 - 50 |
± 0,8 |
± 0,40 |
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52 |
± 1,0 |
± 0,40 |
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55 - 75 |
± 1,0 |
± 0,50 |
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80 |
± 1,0 |
not applicable |
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85 - 100 |
± 1,3 |
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105 - 120 |
± 1,5 |
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125 - 160 |
± 2,0 |
nominal diameter mm |
tolerance |
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165 - 200 |
± 2,5 |
≤ 25 |
not fixed |
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220 |
± 3,0 |
≤ 25 ≤ 80 |
q ≤ 0,40 % di L |
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250 |
± 4,0 |
≤ 80 ≤ 250 |
q ≤ 0,25 % di L |
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> 250 |
± 6,0 |
Lucefin Group, as for what concerns the bars assigned to peeling, requires a maximum deviation on straightness of 2% uniformly along the total length. |
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The deviation for roundness shall not exceed 75% of the tolerance range |
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