MPM Engineering

MPM Engineering Ltd was established in 2001 by professionals in the construction of complex industrial solutions in industrial engineering.The company operates since 1993 with core business import and distribution of stainless steel and various metal products.

MPM Engineering Ltd is registered by the need to unite to distribution and import of stainless steel and related products in the production of various products and components, and provide targets integrated solutions to customers: international and Bulgarian companies privatized and existing businesses.

What is Stainless steel?

In metallurgy stainless steel, also known as inox steel or inox from French "inoxydable", is defined as a steel alloy with a minimum of 10.5 or 11% chromium content by mass. Stainless steel does not stain, corrode, or rust as easily as ordinary steel, but it is not stain-proof.
It is also called corrosion-resistant steel or CRES when the alloy type and grade are not detailed, particularly in the aviation industry. Stainless steel differs from carbon steel by the amount of chromium present.
Stainless steels contain sufficient chromium to form a passive film of chromium oxide, which prevents further surface corrosion and blocks corrosion from spreading into the metal's internal structure.

Types of stainless steel...

*Austenitic, or 300 series, stainless steels make up over 70% of total stainless steel production.
*Ferritic stainless steels generally have better engineering properties than austenitic grades, but have reduced corrosion resistance, due to the lower chromium and nickel content.
*Martensitic stainless steels are not as corrosion-resistant as the other two classes but are extremely strong and tough, as well as highly machinable, and can be hardened by heat treatment.
Martensitic stainless steels are not as corrosion-resistant as the other two classes but are extremely strong and tough, as well as highly machinable,and can be hardened by heat treatment.

Scientific researches and innovations...

In 1904, Leon Guillet published research on alloys with composition that today would be known as 410, 420, 442, 446 and 440-C.
In 1909, Giesen published in England a lengthy account on the chromium-nickel (austenitic 300 series) stainless steels.
Also in England and France, Portevin published studies on an alloy that today would be 430 stainless steel.
In Germany, in 1908, Monnartz & Borchers found evidence of the relationship between a minimum level of chromium (10.5%) on corrosion resistance as well as the importance of low carbon content and the role of molybdenum in increasing corrosion resistance to chlorides.