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All the tools for your order submission in one place

Are you perhaps one of those people who can still remember the legendary times when the Internet was only for cranky computer freaks? Back then, when we still read yesterday's news in today's newspaper, only found out the football results in the sports show and had to go to the city library for specialist research?

Pretty laborious...

We now carry the World Wide Web around with us on our smartphones in our pockets and receive all the information anytime, anywhere – as long as we know where to find it.

Where can you find out, for example, how the alloy of a steel is exactly composed, what weight it will have with a fixed bar length and what its corrosion resistance is like? No, not on Wikipedia, but with the help of the practical tools that we provide to you on our homepage and whose function we would like to explain to you in this article.








Tool #1: Unit converter

We'll start off simple and probably self-explanatory: The unit converter allows you to convert numbers into different units. You simply set the starting and target unit via the drop-down menu, type the desired number in the input field and you will receive your result in the corresponding unit. You can choose between three different basic sizes:

  • Length: The basic size of length should be familiar to everyone; here is the scientific definition anyway: The length indicates the extension of a physical object within one dimension.

    Of course, you don’t need an engineering degree to convert between centimeters and meters. However, there are still said to be countries on this planet that are not convinced of the metric system - at this point a greeting to Chicago! That's why our tool naturally also allows you to convert from and to the imperial units of inches and feet.

  • Tension: It's essential for our steels, above all as a measure of their tensile strength; i.e. the maximum mechanical stress that a material can withstand in a tensile test.

    In metric units, this value is given as Newtons per square millimeter (N/mm²), or Megapascals (MPa), because: 1 N/mm² = 1,000,000 PA = 1 MPa. Kilonewtons per square centimeter (kN/cm²) is also used for larger objects.

    Of course, in the Anglo-American world, people are doing their own thing again. Pulling force is measured there in either kip-force per square inch (ksi) or pound-force per square inch (psi).

  • Energy: In physics, energy is internationally given in joules. One joule is the work done when a body weighing one newton (roughly 100 grams on Earth) is lifted one meter.

    So you could now calculate how often you would have to lift a bar of chocolate to completely use up the energy it contained. For our materials, however, energy is more interesting in notched bar impact tests, which are used to determine the toughness of a material.

    Our tool allows you to quickly convert in the joule space between joule (J), kilojoule (kJ) and dekajoule (daJ) and doesn't leave our American friends out in the rain either: the pound force times inch (in × lbf) is available to you as an additional one unit also available.

Tool #2: Bar Length & Bar Weight

It is often very important for your planning to know the length or weight of our materials - if only to answer the question of whether you can perhaps pick up the steel bars you have ordered with your Ford Transit.

Jokes aside, we will of course always deliver our products to your place of use if you so wish. The operation of this tool is similarly comfortable:



1. If you know the material number, simply enter it in the appropriate field. The tool pulls the associated density from our material database.

2. If you don't know the material number or even want to calculate the dimensions of other objects, add the density of the material.

3. Now enter the width and thickness of your steel bar (or pine wood panel) in millimeters in the appropriate fields.

4. Finally, in the bottom line, add the length you need or the weight you are aiming for. You get the other value as the result.

Unfortunately, at the moment you can only use the metric system in kilograms, millimeters and cubic decimeters. But our engineers are already working on the Imperial variant, so you'll soon be able to calculate how much a slug weighs with a three square perch cross-section and a length of twelve shots.

Tool #3: corrosion resistance

Our materials are often exposed to great stresses in use, not least to corrosion. Corrosion here means not only the formation of rust, for example through contact with water, but also, among other things, scaling, which occurs at high temperatures in connection with oxygen or intergranular corrosion as a result of the precipitation of chromium-rich carbides at the grain boundaries of the crystal structure of a material.

Irrespective of the cause of corrosion, there is one important parameter for corrosion resistance to pitting in steel: the Pitting Resistance Equivalent Number, or PREN for short.

The higher the PREN of a steel, the more resistant it is to pitting caused by corrosion. The decisive factor here is the alloy of the material, because the formula with which the PREN can be calculated is:

PREN = 1 x chrome wt. % + 3,3 x molybdenum wt % + 16 x nitrogen wt. %

PREN - Determination of corrosion resistance of stainless steels


Determination of corrosion resistance of stainless steels in chloride-containing media.

A steel is considered as resistant if PREN ≥ 32.

Determination of corrosion resistance of stainless steels in hydrosulphide media in the context of DIN EN ISO 15156 / NACE.

A steel is considered as resistant if PREN ≥ 40. PREN ≥ is sufficient for steels with Mo ≥ 1,5 wt.-%.




If the material is used in an atmosphere containing hydrogen sulfide, the percentage by mass of tungsten is also added as a summand with a coefficient of 3.3. The formula is then:


PREN = 1 x chrome wt. % + 3,3 x molybdenum wt. % + 16 x nitrogen wt. % + 3,3 x tungsten wt. %


Accordingly, the steel with the material number 1.4539 would have a PREN of:


1 × 20 + 3,3 × 4,5 + 16 × 0,15 = 37,25 PREN


With the help of our tool you can of course save yourself all the calculations. Once you have selected whether to calculate the PREN for a chloride atmosphere or a hydrogen sulfide atmosphere - so whether or not to include tungsten in the formula - all you have to do is enter the mass percentages of chromium (Cr), molybdenum (Mo), nitrogen (N) and, if applicable, tungsten (W) in the appropriate fields. The software does the rest.

From a PREN of 32, steels are considered seawater resistant. For the transport of hydrogen, the PREN should be 26 or more. Finally, we would also like to draw your attention to the two tables in the lower part of the tool:

  • Corrosion resistance class: According to DIN EN 1993-1-4:2015-10, steels are divided into so-called corrosion resistance classes (Corrosion Resistance Classes - CRC). Depending on your project, the material you choose must belong to one of these classes for your project to be approved at all.

    A steel structure near the coast, for example, requires at least one material from CRC III, the boarding ladder of a swimming pool Class IV and a container steamer Class V.

    So that you don't have to wade through data sheets for hours to find a suitable steel for your project, we have listed the most common representatives of each class in this table.

  • Resistance to intergranular corrosion: According to DIN EN 10088-3, steels are further subdivided according to their resistance to intergranular corrosion. A distinction is made between the delivery condition and the sensitized condition.

    You can probably imagine what the delivery condition of a steel is. Steels reach their sensitized state when they are exposed to very high temperatures (austenitic steels above 475° Celsius, ferritic steels from 950° Celsius).

    At these temperature values, the grain boundaries in the metallic structure become increasingly detached, which can lead to increased intergranular corrosion. Materials in the right-hand column of the table resist this chemical process even when sensitized, steels in the left-hand column can even corrode intergranularly in the as-delivered condition.

Tool #4: Scrap, alloy and energy surcharge

Unfortunately, our fourth tool is not interactive, which makes it all the more important for transparency: updated monthly, you will find the surcharges in euros for scrap, alloy and energy that we have to calculate for every kilogram of bar steel. The date of delivery always applies.

The timely updating of our surcharge tables not only enables you to reliably control costs, but also to make strategic purchases: If you can see that the energy surcharge has been increasing for months, it is time to order the materials for your project sooner rather than later.

Tool #5: Material database

We have already presented our practical materials database in detail in a separate article. So just this much at this point:

There are over 2,500 standardized types of steel worldwide, of which we produce around 400 in our rolling mills. With the help of our database, it is almost child's play to choose the right one for you.

Numerous filter functions, the search for typical areas of application, keywords and national and international material numbers and approvals enable you to carry out targeted research in a matter of seconds. Only our professional team can advise you better than our materials database.

Tool #6: Inquiry

Which brings us to the last tool on our list: our inquiry tool, which allows you to easily get in touch with us.

Either to send us your order directly: Simply enter the desired material, its dimensions and the required quantity in the respective fields. Of course, it is also possible to send us construction plans, delivery specifications or other important documents. Then just add your contact information and off you go! We will get back to you as soon as possible via your desired contact channel.

Or you can simply use the tool to send us a general message. Because we are happy to answer your questions about our products and take care of all your concerns about our rolling mills. Would you like to know why your confidential company data is in safe hands with us? Or do we still have apprenticeship positions available for this year? Are you looking for an exciting destination for a trip with your physics course? Just use that

With WE into the future

Our rolling mills have existed for over 350 years; far longer than even the dream of a data network spanning the world. However, the best possible service for our customers has always been our goal - with or without an online presence.

We hope to take another step on this path with our tools and to make working with us even more pleasant. If you have any questions or if you miss a possible tool, please do not hesitate to contact us. Because that's exactly what our live chat is for, but also, as we said, the inquiry tool.