MEISER has its own slitting plants, wire drawing devices and cold rolling centres. We are therefore able to design a grating exactly in accordance with the requirements and wishes of our customers. Here, oversizing makes little sense, while undersizing must be avoided under all circumstances. The ideal combination of material thickness and height, associated with the matching steel quality ensures the greatest possible economic benefits. That is our aspiration - not more and not less. We would like to explain the bestknownversions to you below:
S 235 JR (DIN EN 10025-2) has proven its worth due to its good weldability, malleability and strength. S 275 JR (DIN EN 10025) S275 JR displays comparable product characteristics to S235, although it stands out due to its somewhat higher tensile strength and resilience. S 355 JR (DIN EN 10025) The most important steels in the building industry are not only the well-known concrete steels, but also the steel grades S235JR and S355JR. All of the materials referred to have no passive layer and therefore have to be protected against corrosion. Indoors a primer with an additional coat of paint is sufficient for this. At least hot dip galvanisation is required out of doors.
High - gradesteel
The material non-rusting high-grade steel combines beneficial properties which have today become indispensable for many fields of application. N evertheless, it is important to know which types of high-grade steel are particularly suitable for the intended purpose, since there is no universal material that can be used everywhere. Two generic terms are generally used in Germany: V2A or 1.4301 is a high-grade steel that is often found in everyday use, for example in the construction of banisters, vehicles and sinks. V4A or 1.4571 is similar to V2A, but is additionally alloyed with 2 % molybdenum (Mo). This means that the high-grade steel is more resistant to corrosion in chloride-containing media. V4A high-grade steel is used in areas, for example, which come into permanent contact with salt water, in swimming baths and the chemical industry. It is also possible to pickle and polish the surface of high-grade steel. This process is described in detail on the following page.
Aluminium has been increasingly used over the past few years as a construction material. Its numerous beneficial properties make aluminium an interesting and competitive alternative to steel, and in the list of the most commonly used metals it is behind steel in second position. The specific weight of aluminium is only 2.7 kg/dm (approx. 1/3 of the weight of steel), which in conjunction with its relatively high strength and good welding properties means that in many applications it enables significant weight savings compared to steel structures.
Under the actual rust layer, COR-TEN steels form a particularly dense barrier layer as a result of weathering, which consists of adhesive sulphates or phosphates and protects the component against further corrosion. A distinction is made between Corten A and Corten B. Corten B ASTM A 588 material no. 1.8963, EN 10027-1: S 355J2W is not phosphorus-alloyed, approved by the building authorities, can be readily welded and offers good cold and hot workability. Owing to its insensitivity to the effects of the weather and its characteristic patina, CORTEN steel is also used to provide highlights in architecture, for example in the case of facade cladding.