Stress Management

What Is Stainless Steel and Why Is it Stainless?

Why is Stainless Steel Stainless? What It Is and How It Works! What Is Stainless Steel and Why Is it Stainless? In 1913, English metallurgist Harry Brearly, working on a project to improve rifle barrels, accidentally discovered that adding chromium to low carbon steel gives it stain resistance. In addition to iron, carbon, and chromium, modern stainless steel may also contain other elements, such as nickel, niobium, molybdenum, and titanium. Nickel, molybdenum, niobium, and chromium enhance the corrosion resistance of stainless steel. It is the addition of a minimum of 12% chromium to the steel that makes it resist rust, or stain ‘less’ than other types of steel. The chromium in the steel combines with oxygen in the atmosphere to form a thin, invisible layer of chrome-containing oxide, called the passive film. The sizes of chromium atoms and their oxides are similar, so they pack neatly together on the surface of the metal, forming a stable layer only a few atoms thick. If the metal is cut or scratched and the passive film is disrupted, more oxide will quickly form and recover the exposed surface, protecting it from oxidative corrosion. (Iron, on the other hand, rusts quickly because atomic iron is much smaller than its oxide, so the oxide forms a loose rather than tightly-packed layer and flakes away.) The passive film requires oxygen to self-repair, so stainless steels have poor corrosion resistance in low-oxygen and poor circulation environments. In seawater, chlorides from the salt will attack and destroy the passive film more quickly than it can be repaired in a low oxygen environment. Types of Stainless Steel The three main types of stainless steels are austenitic, ferritic, and martensitic. These three types of steels are identified by their microstructure or predominant crystal phase. Austenitic: Austenitic steels have austenite as their primary phase (face centered cubic crystal). These are alloys containing chromium and nickel (sometimes manganese and nitrogen), structured around the Type 302 composition of iron, 18% chromium, and 8% nickel. Austenitic steels are not hardenable by heat treatment. The most familiar stainless steel is probably Type 304, sometimes called T304 or simply 304. Type 304 surgical stainless steel is an austenitic steel containing 18-20% chromium and 8-10% nickel. Ferritic: Ferritic steels have ferrite (body centered cubic crystal) as their main phase. These steels contain iron and chromium, based on the Type 430 composition of 17% chromium. Ferritic steel is less ductile than austenitic steel and is not hardenable by heat treatment. Martensitic: The characteristic orthorhombic martensite microstructure was first observed by German microscopist Adolf Martens around 1890. Martensitic steels are low carbon steels built around the Type 410 composition of iron, 12% chromium, and 0.12% carbon. They may be tempered and hardened. Martensite gives steel great hardness, but it also reduces its toughness and makes it brittle, so few steels are fully hardened. There are also other grades of stainless steels, such as precipitation-hardened, duplex, and cast stainless steels. Stainless steel can be produced in a variety of finishes and textures and can be tinted over a broad spectrum of colors. For information stainless steel fasteners please contact Marsh Fasteners .  

How it’s made – Stainless steel ( RO Sub )

Victorinox 40520 Fibrox 8-Inch Chef’s Knife $40.00 40520 Features: -Chef’s knife. -Fibrox collection. -Fibrox non slip handle. -High carbon fine grain stainless steel blade. -Taper ground blade for perfect chopping. Specifications: -Made in Switzerland. -Victorinox provides Lifetime warranty against defects in materials and workmanship. -Blade: 8” . -Overall dimensions: 2.25” H x 15.25” W x 0.75” D….

Krups 203 Electric Coffee and Spice Grinder with Stainless-Steel blades …

Cuisinart CSB-76 SmartStick 200-Watt Immersion Hand Blender $55.00 Cuisinart Smart Stick Hand Blender – 200W Blend ingredients right inside pots, pitchers, bowls, or the clear plastic beaker that is included with the Cuisinart Smart Stick Hand Blender, which is available in your choice of color. A powerful 200-watt motor operates with an easy one-touch control. Blend drinks, puree soup, and mix crêpe batters in seconds! The blender features a ergonomic grip that…

The Best of Shai: 20th Century Masters – The Millennium Collection $5.39 Sanyo RL-2500/ SCP-5400 Leather Carry Case with Swivel & Caller ID window Protects your Sanyo RL-2500/ SCP-5400 cellular phone!Leather carry case cover with swivel & caller ID window is designed specifically for Sanyo RL-2500/ SCP-5400 cellular phone models.Has a vinyl window on the outside cover for viewing the Caller ID LCD screen! Leather case Features a reinforced swivel button on the back sid…

Zevro MSR1400 Zero Gravity Magnetic Spice Rack with 12 Canisters $34.99 The Zero Gravity Magnetic Spice Rack by Zevro is a must have accessory for any and every kitchen. There has never been a more stylish, convenient and unique way to store your spices! The plastic magnetic spice canisters are placed on as well as hung below the included shelf, creating the most space efficient spice rack ever! With a flip of the finger, the pour control system adjusts between closed…

Inside the Dream Syndicate 3: Stainless Gamelan $19.98 …

Swiss+Tech MMCSSS Micro-Max 19-in-1 Keychain Multitool $8.03 The new Micro-Max 19-in-1 Series offers the most comprehensive and versatile set of tools to date. This solid stainless steel tool set, with its patented, quick-release and self-locking mechanism, folds out into 19 different professional-grade tools. Tighten, loosen, wire, drill, file, open and measure with ease. Includes 2 hex wrenches, 6 screwdrivers, pliers, wire cutter, wire stripper, wire cri…

simplehuman Wall Mount Grocery Bag Holder, Brushed Stainless Steel $8.30 A wall mounted grocery bag holder comes complete with mounting hardware. This stainless steel unit features easy tuck opening and wide dispensing area….

SE 6-1 Camping S. Steel Detachable Knife 4 Body $3.49 New camping utensil set. This sturdy tool is made of high quality stainless steel. It includes a sharp knife, fork, spoon, corkscrew and bottle opener. A great tool for weekend camping! The tool even separates, so you can use the knife and fork in different hands. It comes with its own storage bag. Folded length: 4 1/2″ Weight with bag: 5.3 oz…

Super Use $1.99 …

Tags: stainless steel, stainless steel backsplash, stainless steel cleaner, stainless steel cookware, stainless steel tubing

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