Stainless Steel | General Information
EN Standards for Stainless Steel H.R. Plate
For Hot Rolled stainless steel the old BS1449 and BS1501 standards have been replaced by EN Standards:
EN10088-2 Replaces BS1449-Part 2: 1983
EN10028-7 Replaces BS1501-Part3: 1990
EN10095 Covers Heat Resisting Grades
EN10259 & ISO 9445: Tolerances for COLD Rolled material (Sheets, plate, coil) up to 6.5mm thick
EN10029 & ISO 18286: Tolerances for 'Quarto' Hot Rolled Plate 3mm thick and above
EN10051 & Now ISO 9445 / 9444: Tolerances for Continuosly Produced (CPP) Hot Rolled Plate
Flatness - Quarto Plate
| Thickness (mm) | Tols (mm) over Given Length (mm) | Tols (mm) over Given Length (mm) |
| 1000 | 2000 | |
| 3 to 4.9 | 9 | 14 |
| 5 to 7.9 | 8 | 12 |
| 8 to 14.9 | 7 | 11 |
| 15 to 24.9 | 7 | 10 |
| 25 to 39 | 6 | 9 |
| 40 to 250 | 5 | 8 |
Length - Quarto Plate
| Length (mm) | Tolerance in (mm) | Tolerance in (mm) |
| Under 4000 | -0 | +20 |
| 4000 to 5999 | -0 | +30 |
| 6000 to 7999 | -0 | +40 |
Width - Quarto Plate
| Nominal Thickness (mm) | Tolerance (mm) | Tolerance (mm) |
| Up to 40 | -0 | +20 |
| 40 to 150 | -0 | +25 |
| 150 to 400 | -0 | +30 |
Thickness - Quarto Plate
| Thickness (mm) | Tolerance (mm) CLASS B | Tolerance (mm) CLASS B |
| Minus | Plus | |
| 3 to 4.9 | 0.3 | 0.7 |
| 5 to 7.9 | 0.3 | 0.9 |
| 8 to 14.9 | 0.3 | 1.1 |
| 15 to 24.9 | 0.3 | 1.3 |
| 25 to 39.9 | 0.3 | 1.7 |
| 40 to 79.9 | 0.3 | 2.3 |
| 80 to 149 | 0.3 | 2.9 |
| 150 to 250 | 0.3 | 3.3 |
Flatness - CPP
For CPP there are 3 categories of tolerances according to the grade where:
B = Ferritic and Martensitic Grades
C = Austenitic Grades without Mo
D = Austenitic Grades with Mo
* These flatness tolerances only apply for thicknesses up to 25mm
** To be agreed at the time of enquiry and order
| Width (mm) | Tols* for given category | Tols* for given category | |
| B | C | D** | |
| Up to 1200 | 18 | 23 | ** |
| 1200 to 1500 | 23 | 30 | ** |
| Over 1500 | 28 | 38 | ** |
Length - CPP
| Length (mm) | Tolerance (mm) | Tolerance (mm) |
| Under 2000 | -0 | +20 |
| 2000 to 7999 | -0 | 0.05 x Length |
Width - CPP
| Length (mm) | Plus Tols (mm) (-0) | Plus Tols (mm) (-0) |
| Up to 1200 | +20 | +3 |
| 1201 to 1850 | +20 | +5 |
| Over 1850 | +25 | +6 |
Thickness - CPP
These figures must be increased for stainless steel by:
15% for Ferritic & Martensitic
30% for Austenitic
40% for Moly Grades
| Thickness (mm) | Tols +/-(mm) for given width | Tols +/-(mm) for given width | Tols +/-(mm) for given width | Tols +/-(mm) for given width |
| Up to 1200 | 1201 to 1500 | 1501 to 1800 | Over 1800 | |
| Up to 2.0 | 0.17 | 0.19 | 0.21 | - |
| 2.01 to 2.5 | 0.18 | 0.21 | 0.23 | 0.25 |
| 2.51 to 3.0 | 0.20 | 0.22 | 0.24 | 0.26 |
| 3.01 to 4.0 | 0.22 | 0.24 | 0.26 | 0.27 |
| 4.01 to 5.0 | 0.24 | 0.26 | 0.28 | 0.29 |
| 5.01 to 6.0 | 0.26 | 0.28 | 0.29 | 0.31 |
| 6.01 to 8.0 | 0.29 | 0.30 | 0.31 | 0.35 |
| 8.01 to 10.0 | 0.32 | 0.33 | 0.34 | 0.40 |
| 10.01 to 12.50 | 0.35 | 0.36 | 0.37 | 0.43 |
| 12.51 to 15.0 | 0.37 | 0.38 | 0.40 | 0.46 |
| 15.01 to 25.0 | 0.40 | 0.42 | 0.45 | 0.50 |
Width - CPP
Tolerances
For Cold Rolled Plate please refer to the datasheet on cold rolled
Note that in this Datasheet there are two sets of tolerances tables – One set for Quarto Plate to EN10029 and one set for CPP plate to EN10051
For CPP there are 3 categories of tolerances according to the grade where:
B = Ferritic & Martensitic Grades
C = Austenitic Grades without Mo
D = Austenitic Grades with Mo
Material Certification
Where multi-certification is required, a combination of EN10088-2, EN10028-7, EN10029 or 10051 will appear together with the appropriate ASTM Standards.