Patterned steel
Patterned steel enhances grip, durability, and safety on walking surfaces, making it ideal for outdoor environments prone to freezing. Patterned steel are widely used in both dry industrial settings and challenging outdoor conditions.
Why use Patterned Steel?
The general name “Patterned steel” is used to mean all the patterns and both patterned coils and patterned cut length sheets. In everyday language patterned steel is often named in accordance with its most general use i.e. floor plate.
Patterned steels are used for enhancing the grip, durability and safety of walking surfaces. The properties of tear patterns 1 and 2 are best suited for outdoor applications where the surface may be susceptible to freezing. Patterned steel can be supplied as cut length sheets or coils, either with mill edges or with sheared edges.
Where is patterned steel used?
The chequer pattern, which has excellent wear resistance properties, is recommended for dry environments. The properties of tear patterns 1-2 are best suited for outdoor applications where the surface may be susceptible to freezing. The tear pattern 2 is the best choice, however, for applications in which formability is required as the flangeability of this pattern is equally good in all sheet directions. The reference standards for patterned steels are DIN 59220/00, SEL014E-79, SFS-EN10363:2016 and ASTM A 786-15 (2021).
Walking surfaces both indoors and outdoors
Floorings
Stairways
Transport equipment
Applications in which good non-slip properties and load-bearing capacity are required
Selection criteria for patterned steel
The use of patterned steel for walking surfaces provides strength, lightness, practicality, durability, good appearance and safe grip on the surface. Mechanical properties of structures made from patterned steel is based on the thickness of the basic sheet. This means that the pattern is not taken into account when calculating the strength. The chequer pattern is recommended for use under dry conditions due its better wear resistance. The properties of tear patterns are best suited for outdoor applications where the surface may be susceptible to freezing. Tear patterned surfaces allow water to drain away more easily, in addition to which cleaning is also easier. The tear pattern 2 is the best choice, however, for applications in which formability is required as the flangeability of this pattern is equally good in all plate directions.Patterns
Chequer pattern
Tear pattern 1
Tear pattern 2
The dimensions of the patterns are:
- height 1–2 mm
- length tolerance 0/+40 mm.
Weight of patterned steels:
- In order to determine the theoretical weight of a patterned steel, the weight of the basic steel is first calculated using the density of 7.85 kg/dm3. The pattern weight is then added to the basic steel weight: approximately 2 kg/m2 for tear pattern 1, whereas 4 kg/m2 for tear pattern 2 and for chequer pattern.
Size of order and delivery weight
The smallest order is one patterned coil or the equivalent of one coil in the same width of cut lengths. Larger orders must be multiples of this minimum amount. Cut lengths of patterned sheet are supplied in bundles. Bundles always contain cut lengths of the same thickness, width and length. The tolerance on delivery weight of patterned coils and cut lengths is ±10 %, with a minimum of -2 tonnes and maximum of +3 tonnes. The recommended weight / width ranges for patterned coils and cut lengths are 8–12 kg/mm of width and 17–20 kg/mm of width. The weight/width range is calculated by dividing the weight of a ready-made coil in kilograms by its width in millimetres. The weight/width range of cut lengths is calculated from the original coil before it is cut to cut lengths.
Steel grades
Patterned steels are manufactured in three main strength categories of structural steel:
- Strength class ReH = 235 MPa, for example S235JR EN 10025-2
- Strength class ReH = 275 MPa, for example S275JR EN 10025-2
- Strength class ReH ≈ 355 MPa, for example S355MC EN 10149-2.
Patterned steels of other steel grades or other strength classes are manufactured when agreed upon separately.
Mechanical properties and material testing
The mechanical properties of patterned steel that are in compliance with standards ASTM A 786 and SFS-EN10363:2016 meet the requirements set for the steel grade in question. The elongation requirements for patterned steel in accordance with DIN 59220 must be checked, when necessary, from the supplier. The materials testing of patterned steel is carried out in accordance with the respective material and patterned steel standards
Inspection document and product marking
An inspection certificate EN 10204-3.1 is provided in accordance with the order requirements. Patterned steels are marked on order and drawing as shown in the following examples:
- Tear pattern 2 ASTM A 786 – 6.0x1500x6000 S355MC EN 10204-3.1.
- Chequer pattern SFS-EN10363:2016 – 5.0x1500x3000 S235JR EN 10204-3.1.
Dimensional ranges
The values shown are for patterned coils and cut to length sheets with mill edges.
Strength class ReH = 235 MPa
| Thickness mm | Width mm |
|---|---|
| 3.00–3.49 | 1200–1535 |
| 3.50–3.99 | 1200–1660 |
| 4.00–4.74 | 1200–1710 |
| 4.75–10.00 | 1100–1860 |
| 10.01–13.00 | 1000–1585 |
Strength class ReH ≈ 275 MPa
| Thickness mm | Width mm |
|---|---|
| 3.00–3.49 | 1200–1360 |
| 3.50–3.99 | 1200–1485 |
| 4.00–4.74 | 1200–1530 |
| 4.75–5.99 | 1100–1710 |
| 6.00–10.00 | 1000–1710 |
| 10.01–13.00 | 1000–1535 |
Strength class ReH ≈ 355 MPa
| Thickness mm | Width mm |
|---|---|
| 3.50–3.99 | 1200–1335 |
| 4.00–4.74 | 1200–1430 |
| 4.75–4.99 | 1100–1530 |
| 5.00–5.99 | 1100–1660 |
| 6.00–10.00 | 1000–1660 |
| 10.01–13.00 | 1000–1410 |
For patterned steels with sheared edges the maximum width is reduced by 40 mm compared with the standard value of the corresponding thickness. Patterned cut length sheets may be supplied in the length range of 2,000–12,000 mm. The inside diameter of patterned coils is usually 760 mm, but coils with an inside diameter of 610 mm can be supplied on request.
Dimensions other than those shown in the tables can be supplied by special agreement.