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Posts Tagged ‘properties of stainless steel’

The Many Inventors of Modern Stainless Steel

May 2nd, 2016 by Natalie Mueller

Filed under: Stainless Steel

Before businesses worldwide were entrusting a Skolnik 55 gallon stainless steel drum with the shipment and storage of their most precious materials, someone had to invent stainless steel. While most people credit Harry Brearley with the discovery of stainless steel, but he was just one cog in the wheel of the invention (and definition!) of modern stainless steel.

Our journey begins in 1820 when two Englishmen, Stoddard and Farraday, and a Frenchman, Berthier, noted that iron-chromium alloys were more resistant to acids. They tried to produce higher chromium alloys to further test their discovery, but were unsuccessful.

Enter another pair of Englishmen, Woods and Clark, who in 1872 filed for the patent of an acid and weather resistant iron alloy containing 30-35% chromium and 2% tungsten. This was the first ever patent on what would, by today’s standards, be considered stainless steel. Though stainless steel was not officially defined until 1911.

The next big development, in 1875, came courtesy of another Frenchman, Brustlein. Brustlein is credited with discovering and outlining the importance of low carbon content in stainless steel – in order to create an alloy with high chromium content the carbon content must be kept lower than 0.15%. However, it wasn’t until 1895, when German scientist, Hans Goldschmidt, developed the aluminothermic reduction process for producing carbon-free chromium that the stainless steel development race truly began.

There was French scientist Leon Guillet who extensively researched iron-chromium alloys, including many of today’s models. And English Giesen who studied and published works on chromium-nickel steels while French national, Portevin, studied what is now known as 430 stainless steel.

And then, in 1911, the moment we’ve all been waiting for: German scientists P. Monnartz and W. Borschers discovered the correlation between chromium content and stainless steel’s beloved corrosion resistance. And stainless steel was finally defined.

The man often credited with the discovery of stainless steel, Harry Brearely, was a lead researcher at Brown Firth Laboratories in England. In 1912, Brearley was tasked by a small arms manufacturer with an erosion problem. Brearley set out to develop an erosion resistant steel for him, experimenting with steel alloys containing with chromium. During these experiments, specifically on August 13 1913, Brearley created a steel with 12.8% chromium and 0.24% carbon, arguably the first ever stainless steel.

Brearley’s title as “inventor of stainless steel” is greatly contested by a few americans, Elwood Haynes, Becket and Dantsizen, a polish man, Max Mauermann, and a few Swedes. Whoever is the true inventor, we and our clients want to thank them. If it weren’t for these hardworking metallurgists, researchers and scientists, Skolnik wouldn’t be able to provide our partners and customers with our expansive collection of stainless steel containers, including our crowned jewel, and most popular container, the 55 gallon stainless steel drum.

 

Stainless Steel: A Brief History

July 23rd, 2015 by Natalie Mueller

Filed under: Industry News

By definition, stainless steel is a steel alloy with a minimum of 10.5% chromium content by mass. It is stainless steel’s chromium content that differentiates it from carbon steel and provides the corrosion, rust and stain-resistant properties we have grown accustomed to for storing and shipping various materials. In the proper quantities, chromium forms a film of chromium oxide, protecting the surface and internal structure of the steel from corrosion.

The magical corrosion resistance of chromium can be traced back to 1821 when French metallurgist, Pierre Berthier, noted iron-chromium alloys resistance to some acids and suggested the alloys should be used in the construction of cutlery. Unfortunately for 19th century people and their cutlery, it was too difficult to produce the level of carbon to chromium found in today’s stainless steel. These early alloys were exciting and new, but a bit on the brittle side until the late 1890s when German chemist, Hans Goldschmidt, made his discovery. Goldschmidt developed a process for producing carbon-free chromium.

Goldschmidt’s development set several researchers down the path to alloys that, by today’s standards, would qualify as stainless steel. Year after year, more researchers and scientists developed more different high-chromium alloys and reported new properties and benefits to this ‘stain-less steel.’ It was patented, industrialized and, by the time the Great Depression hit, was being manufactured, utilized and sold en mass in the United States.

Early researchers were right to get excited by this new steel. It’s high resistance to oxidization, acids, weak bases, organics, rust and stains paired with it’s low conductivity and easy sanitation has made it an ideal material for numerous applications including, but not limited to, the containment, transport and storage of food and beverages, hazardous materials and more. At Skolnik Industries, stainless steel barrels aren’t just corrosive resistant and antibacterial, they are also made thicker and stronger than industry standards. And, because stainless steel isn’t porous or absorbent, a Skolnik stainless steel barrel may be used multiple times after proper cleaning.

I doubt Berthier knew what he had stumbled upon two centuries ago, but on behalf of Skolnik and all of our partners, we’re very grateful for the developments his curiosity set in motion.