Actually, stainless steels are a family of alloys, which can have a great range of properties, depending on what they are to be used for. Stainless steels are often used for their appearance or corrosion resistance, but they are also used for heat resistance, strength or toughness, and for their magnetic properties.
The best grade of stainless steel is chosen to suit the application. The grades fit into branches of the family, called austenitic, ferritic, duplex, martensitic or precipitation hardening, depending on their crystal structure. But most types — the ferritics, martensitics, duplexes and most of the precipitation hardening grades — are magnetic. The corrosion resistance is not affected in any way by whether the grade of stainless steel is magnetic or not — corrosion resistance depends on how much of the key alloying elements you have, especially chromium and molybdenum.
Even the austenitics can become somewhat magnetic when they are deformed. Try putting a magnet in the corner of a stainless steel sink — some magnetism can usually be detected. The amazing ability of austenitic stainless steel to deform without breaking is used to deep draw sinks in one piece — without heating!
Stainless steel do cost more than carbon steels, in dollars per tonne. With the extra alloys, they are bound to. But the extra performance of stainless steels more than pays for the difference, and stainless steel often works out as the cheapest way to do the job.
Carbon steels usually need to be painted for corrosion protection, and even if their first installed cost is lowest, their advantage disappears on the day they have to be repainted. The cost of stainless in dollars per day for the life of the job will be much lower. This is also a lower carbon, austenitic alloy containing chromium and nickel. Duplex stainless steel is a combination of ferritic and austenitic grades of steel.
This combination creates steel that is resistant to localized corrosion, such as pitting, stress corrosion cracking, and crevice attack. Duplex steel products have higher strength than other stainless compositions. It has been successfully used in the construction of off shore oil rigs. When you decide that stainless steel is the best choice for your marine project, due to its corrosion resistance, durability, and easy maintenance, allow our team to assist you in choosing the most suitable grades and alloys.
Stainless Structurals manufactures a wide array of standard and custom shapes and profiles in numerous grades and alloys. Some of these include beams , channels , angles , tees , and hollow sections. Our laser fusion technology is state-of-the-art and will give your project a distinctively clean appearance with precise lines.
All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon. Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.
Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards. Copyright Aalco Metals Limited. All rights reserved. VAT No. Aalco The UK's largest independent multi-metals stockholder.
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