Tolerances are defined as Normal, Fine (F) or Precision (P). If the tolerance type is not specifically mentioned at the time of enquiry or order the Normal tolerance shall apply.
Nominal Width (w) | w < 125 | 125 < w < 250 | 250 < w < 600 | |||||||
Nominal Thickness (t) | Normal | Fine (F) | Precision(P) | Normal | Fine (F) | Precision(P) | Normal | Fine (F) | Precision(P) | |
Equal to and over | Less than | |||||||||
0.052) | 0.10 | ±0.10t | ±0.06t | ±0.04t | ±0.12t | ±0.10t | ±0.08t | ±0.15t | ±0.10t | ±0.08t |
0.10 | 0.15 | ± 0.010 | ±0.008 | ±0.006 | ±0.015 | ±0.012 | ±0.008 | ±0.020 | ±0.015 | ±0.010 |
0.15 | 0.20 | ±0.015 | ±0.010 | ±0.008 | ±0.020 | ±0.012 | ±0.010 | ±0.025 | ±0.015 | ±0.012 |
0.20 | 0.25 | ±0.015 | ±0.012 | ±0.008 | ±0.020 | ±0.015 | ±0.010 | ±0.025 | ±0.020 | ±0.012 |
0.25 | 0.30 | ±0.017 | ±0.012 | ±0.009 | ±0.025 | ±0.015 | ±0.012 | ±0.030 | ±0.020 | ±0.015 |
0.30 | 0.40 | ±0.020 | ±0.015 | ±0.010 | ±0.025 | ±0.020 | ±0.012 | ±0.030 | ±0.025 | ±0.015 |
0.40 | 0.50 | ±0.025 | ±0.020 | ±0.012 | ±0.030 | ±0.020 | ±0.015 | ±0.035 | ±0.025 | ±0.018 |
0.50 | 0.60 | ±0.030 | ±0.020 | ±0.014 | ±0.030 | ±0.025 | ±0.015 | ±0.040 | ±0.030 | ±0.020 |
0.60 | 0.80 | ±0.030 | ±0.025 | ±0.015 | ±0.035 | ±0.030 | ±0.018 | ±0.040 | ±0.035 | ±0.025 |
0.80 | 1.00 | ±0.030 | ±0.025 | ±0.018 | ±0.040 | ±0.030 | ±0.020 | ±0.050 | ±0.035 | ±0.025 |
1.00 | 1.20 | ±0.035 | ±0.030 | ±0.020 | ±0.045 | ±0.035 | ±0.025 | ±0.050 | ±0.040 | ±0.030 |
1.20 | 1.50 | ±0.040 | ±0.030 | ±0.020 | ±0.050 | ±0.035 | ±0.025 | ±0.060 | ±0.045 | ±0.030 |
1.50 | 2.00 | ±0.050 | ±0.035 | ±0.025 | ±0.060 | ±0.040 | ±0.030 | ±0.070 | ±0.050 | ±0.035 |
2.00 | 2.50 | ±0.050 | ±0.035 | ±0.025 | ±0.070 | ±0.045 | ±0.030 | ±0.080 | ±0.060 | ±0.040 |
2.50 | 3.003) | ±0.060 | ±0.045 | ±0.030 | ±0.070 | ±0.050 | ±0.035 | ±0.090 | ±0.070 | ±0.045 |
Nominal Thickness (t) | Nominal Width (w) | ||||||||||||
Equal to and over | Less than | w < 40 | 40 < w < 125 | 125 < w < 250 | 250 < w < 600 | ||||||||
Normal | Fine (F) | Precision (P) | Normal | Fine (F) | Precision (P) | Normal | Fine (F) | Precision (P) | Normal | Fine (F) | Precision (P) | ||
— | 0.25 | +0.17/-0 | +0.17/-0 | +0.10/-0 | +0.20/-0 | +0.15/-0 | +0.12/-0 | +0.25/-0 | +0.20/-0 | +0.15/-0 | +0.50/-0 | +0.50/-0 | +0.40/-0 |
0.25 | 0.50 | +0.20/-0 | +0.15/-0 | +0.12/-0 | +0.25/-0 | +0.20/-0 | +0.15/-0 | +0.30/-0 | +0.22/-0 | +0.17/-0 | +0.60/-0 | +0.50/0 | +0.40/-0 |
0.50 | 1.00 | +0.25/-0 | +0.20/-0 | +0.15/-0 | +0.25/-0 | +0.22/-0 | +0.17/-0 | +0.40/-0 | +0.25/-0 | +0.20/-0 | +0.70/-0 | +0.60/-0 | +0.50/-0 |
1.00 | 1.50 | +0.25/-0 | +0.22/-0 | +0.15/-0 | +0.30/-0 | +0.25/-0 | +0.17/-0 | +0.50/-0 | +0.30/-0 | +0.22/-0 | +1.0/-0 | +0.70/-0 | +0.60/-0 |
1.50 | 2.50 | — | — | — | +0.40/-0 | +0.25/-0 | +0.20/-0 | +0.60/-0 | +0.40/-0 | +0.25/-0 | +1.0/-0 | +0.80/-0 | +0.60/-0 |
2.50 | 3.00 | — | — | — | +0.50/-0 | +0.3/-0 | +0.25/-0 | +0.6/-0 | +0.40/-0 | +0.25/-0 | +1.2/-0 | +1.0/-0 | +0.80/-0 |
Nominal Length (L) | Tolerances | |
Normal | Special (S) | |
L < 2000 | +3.00/-0 | +1.50/-0 |
2000 < L < 4000 | +5.00/-0 | +2.00/-0 |
The flatness tolerance of cut lengths shall not exceed 10mm for normal cases and 7mm where a special tolerance (FS) is required. This requirement does not apply to material supplied in the work hardened condition.
For skin passed or stretch levelled strip the waviness of the edges shall be 0.03 for nominal thicknesses up to and including 1.00 mm and 0.02 for nominal thicknesses over 1.00, where waviness is defined as:
h/L where h is the wave height and L is the length over which the height is measured.
The out of squareness of cut lengths in widths of 250mm and above shall not exceed 0.5% of the actual width of the product.
For cut lengths in widths of less than 250mm, the value is to be agreed at the time of enquiry and order.
Out of squareness is measured as in the diagram below:
These shall be as in the table below:
Specified width | Edge camber tolerances | ||||
Equal to and over | Less than | Normal | Restricted (R) | ||
Measuring length | Measuring length | ||||
1000 | 2000 | 1000 | 2000 | ||
10 | 25 | 4 | 16 | 1.5 | 6 |
25 | 40 | 3 | 12 | 1.25 | 5 |
40 | 125 | 2 | 8 | 1.0 | 4 |
125 | 600 | 1.5 | 6 | 0.75 | 3 |
Edge camber is the greatest deviation of a side edge from a straight line, the measurement being taken on the concave side with a straight edge as shown in the diagram below: