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Introduction and Characteristics of stainless steel

Introduction and Characteristics of
stainless steel
Stainless steel is well known for corrosion and heat
resistance which is also an alloy of iron and carbon. It
also includes some other elements like chromium, nickel,
magnesium, molybdenum, and nitrogen. As chromium is
present 10 percent in stainless steel, it can resist
corrosion. The chromium prevents stainless steel from
getting rust.
The stainless steel has good mechanical properties. As a
result, it is widely used in making numerous components
in industries. If we compare ordinary steel with stainless
steel, we will see that stainless steel is 200 times more
corrosion resistant than our standard steel.
Once we use stainless steel in any components, it does
not require any paint or finishing.
Even stainless steel is good-looking.
Characteristics of stainless steel
Heat resistant
High tensile strength
Easy to fabricate
Good for environment
Temperature and corrosion resistant
Grading system
Stainless steel manufactured by self tapping screw
manufacturer in india is classified on its grades, and each
grade has unique properties. Each stainless steel is
represented first by a serial number followed by a grade
number. There are some popular series in stainless steel,
like 200,300,400,600. Mainly two types of grades are
used in stainless steel, like 304 and 316.
Classification of stainless steel
Ferritic stainless steel – It has a high percentage of
chromium. These types of steel have good ductility
and magnetic properties, and they are excellent in
resistance to corrosion. Ferritic stainless steel is
used in heat exchangers, furnaces, and various
automobile parts.
Austenitic stainless steel– It is most commonly used,
mainly of two types, i.e., 300 series and 200 series.
In the 300 series, nickel is added to stainless steel.
Whereas in the 200 series, there is the addition of
manganese and nitrogen to the stainless steel. The
austenitic stainless steel is mainly used in cutlery,
surgical equipment, boat fittings, the aerospace
industry, and various others.
Martensitic stainless steel– It is 400-grade stainless
steel with 12 to 15 percent chromium and 1 percent
molybdenum. This category of stainless steel is
magnetic and has high ductility and toughness. So,
they can be formed easily. Martensitic stainless steel
is used in various applications like kitchen utensils,
pumps, valves, machine parts, cutlery, and various
Duplex stainless steel – They are mixed stainless
steel, i.e., a mixed microstructure of ferrite and
austenite. Here the chromium and molybdenum are
high with very low nickel content. These have wide
applications like heat exchanger tubes, the food
industry, high chloride environments, and various
Manufacture of stainless steel
Stainless steel socket head cap screw is quite commonly
manufactured in various companies in India. These are
produced from high-grade stainless steel. They have a
cylindrical head and hexagonal hole. The socket head
resistance towards corrosion, higher ductility, and high
toughness. Because of this property, it is widely used in
industrial applications.
Apart from this, the manufacturing companies in India
also produce SS 304 screws, A325 Structural Bolts, and
various others.
Stainless steel has numerous applications. We use this
type of steel not only in our daily activities but also they
are used in industrial and medical applications.