By Roger Brochu, lundi le 6 mai 2019, 18:38
We must go back to 1913 to witness the birth of stainless steel as we know it today. Discovered by an English engineer during tests to reduce the wear of steel, stainless steel has revolutionized the way to manufacture mechanical parts. Today, this material stands out as one of the most reliable thanks to its advantageous properties, establishing at the same time as the number 1 choice in most industries.
Gestion Industrial RB (GRB) specializes in importing and distribution of industrial mechanical parts. Today GRB offers a wide range of products, it is with a wide variety of stainless steel bearings that the company located in Sainte-Catherine has made a name for itself in the industry. It was in 2001 that GRB focused in this type of mechanical parts, becoming at the same time the reference for stainless steel parts.
Today, GRB is proud to offer its customers a complete series of stainless steel bearings. A wide selection of full feet stainless steel pillow blocks flanges and inserts. These types of bearings are particularly used in the food and pharmaceutical industries, as well as in environments sensitive to corrosion.
The raceways and balls are made of AISI 440C stainless steel. The bearing housings, cages, slingers and grease nipples are made of AISI 304 stainless steel.
Gestion Industrial RB also distributes stainless steel accessories. Among these accessories, several models of stainless steel Ball Bearing, rod end ball joints and shaft collars are available. Added to this list are other products such as chain, sprockets and gears.
Stainless steel is composed of more than 10.5% chromium. It is this property that defines the main advantage of the stainless steel mechanical part, which is its property of being very slightly corrosive. In large quantities, chromium results in the formation of a protective layer called chromium oxide, a shield that immunizes surfaces against rust. As a result, the mechanical stainless steel part can be used in an environment where other materials cannot be effective, especially in wet or marine areas.
There are three main families of stainless steel: austenitic, ferritic and martensitic. It is possible to classify them according to their chemical composition, their main properties of use and their crystalline structure.
Firstly, austenitic stainless steel mechanical parts are composed on average of 18% of chromium and 8 to 10% of nickel. Thanks to the high percentage of nickel, the mechanical parts of this type of material have a high deformation capacity and a good resistance to corrosion. These mechanical parts adapt well to temperature variations.
Second, there is a stainless steel called ferritic with a carbon percentage of less than 0.1%. Mechanical parts of this type are particularly used for their anticorrosive properties rather than for their mechanical properties. It is also interesting to note that at room temperature, ferritic stainless steel is magnetic.
Thirdly, martensitic stainless steel has higher carbon content than the others with a percentage greater than 0.08%. This composition gives the mechanical parts a high performance. Martensitic steels are magnetic, very rigid and resistant. 440C stainless steel has the greatest hardness, up to Rockwell 60. It is ideal for ball bearings.