Carbon Steel M3 M4 M5 Hex standoff custom Galvanized Male And
Female hexagon studs
Product Description:
What is a standoff? As the name suggests, the standoff is a screw
with internal thread at one end and external thread at the other
end, and the broad sense of the standoff also includes screws with
internal threads at both ends. Its appearance is hexagonal, play a
role in fastening and isolating, because it is generally made of
hexagonal copper rods as raw materials, so the standoff is also
known as copper column, hexagonal copper column, copper isolation
column or copper gasket column.
The use of copper columns. Hexagonal screws are mainly used in
computers, circuit boards and other industries, when one end is
screwed into the locked object, the hexagonal column is exposed to
the outside, which can fix or isolate other objects.
The main specifications of standoff are M3, M4, M5, M6, M8, M10,
etc., and the specifications of the hexagonal column are 5, 6, 8,
10, 12, 15 mm, etc., of which the M3 series is the most. Materials
in addition to copper and stainless steel, there are fast cutting
steel.
Hexagonal studs are also known as yin and yang studs, it is one end
of the internal thread and one end of the external thread, but are
hexagonal, can play a role in fastening and isolation.
Mostly used in computers, circuit boards and other industries, when
used, when one end is screwed into the workpiece being fastened,
the hexagonal column is exposed on the surface, can be fixed or
isolated from other workpieces. Such as in the computer mainframe,
the external thread can be connected to the motherboard inside the
mainframe, the internal thread can be isolated from the motherboard
and sheet metal shell.
Applications:
Carbon steel is an iron-carbon alloy with a carbon content of
0.0218 per cent to 2.11 per cent. It is also called carbon steel.
Generally also contains a small amount of silicon, manganese,
sulfur, phosphorus. Generally, the higher the carbon content in
carbon steel, the greater the hardness, the higher the strength,
but the lower the plasticity.
Classification
(1) According to the use of carbon steel can be divided into carbon
structural steel, carbon tool steel and free-cutting structural
steel three categories, carbon structural steel is divided into
engineering construction steel and machine manufacturing structural
steel two;
(2) According to the smelting method can be divided into flat
furnace steel, converter steel;
(3) According to the method of deoxidation can be divided into
boiling steel (F), sedentary steel (Z), semi-sedentary steel (b)
and special sedentary steel (TZ);
(4) According to the carbon content of carbon steel can be divided
into low carbon steel (WC ≤ 0.25%), medium carbon steel
(WC0.25%-0.6%) and high carbon steel (WC ≥ 0.6%);
(5) according to the quality of steel can be divided into ordinary
carbon steel (containing phosphorus, sulphur higher), high-quality
carbon steel (containing phosphorus, sulphur lower) and
high-quality steel (containing phosphorus, sulphur lower) and
high-quality steel.
Stainless Steel:
1, the basic knowledge of stainless steel
Stainless steel is an alloy material with corrosion resistance, and
its main components are an alloy of elements such as iron, chromium
and nickel. These elements can effectively resist oxidation and
corrosion, so that stainless steel has a high degree of durability
and aesthetics.
2, stainless steel maintenance methods
Cleaning
Keeping stainless steel products clean is an important part of
their maintenance. You can use mild detergents and soft cloth for
cleaning, avoid the use of detergents containing acidic and
alkaline components, so as not to damage the surface of stainless
steel. When removing dirt, you should try to avoid using irritating
cleaning tools to avoid scratching the stainless steel surface.
After cleaning, rinse with water and dry with a clean soft cloth.
3, the use of stain remover
For some stubborn dirt, you can use special stainless steel stain
remover for cleaning. But before using it, you should carefully
read and follow the instructions in the product manual. In
addition, stainless steel products on the dirt can be cleaned with
alcohol or vinegar, these common cleaners on stainless steel has a
certain decontamination effect.
Steel types:
| No. | C% | Cr% | Ni % | Mo % |
| 304 | 0.07 | 17.5-19.5 | 8.0-10.5 | / |
| 316 | 0.08 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 |
| 301 | 0.15 | 16.0-18.1 | 6-8 | / |
| 310 | 0.08 | 24-26 | 19-22 | / |
| 304L | 0.03 | 18-20 | 8-12 | / |
| 316L | 0.03 | 16-18 | 10-14 | 2-3 |
| 321 | 0.08 | 17-19 | 9-12 | / |
201, 304, 316 are austenitic stainless steel, according to the
performance of the non-magnetic, some of the performance of the
weak magnetic because of the smelting of the composition of the
segregation or improper heat treatment leads to the austenite in a
small amount of martensite or ferrite. Austenitic stainless steel
corrosion resistance comes from the formation of chromium oxide
protective layer on the metal surface. When the material
temperature is heated to 450 degrees -900 degrees, the structure
changes, will form chromium carbide along the edge of the crystal
and can not form a protective layer of chromium oxide, thus
reducing the corrosion resistance, this is also known as
‘intergranular corrosion’. As a result, there are 304L and 316L,
the two due to the low carbon content also reduces the
intergranular corrosion. In particular, the higher susceptibility
to intergranular corrosion does not mean that non-low carbon
content is more susceptible to corrosion, in a highly chlorinated
environment, this susceptibility is also higher.
Resistant to air, steam, water and other weak corrosive media or
stainless steel, such as 201 (1Cr17Mn6Ni5N), 202 and other 2 series
of steel; and will be resistant to chemical corrosive media (acids,
alkalis, salts, etc.) corrosion of the steel to become
acid-resistant steel, such as 304 (06Cr19Ni10), 316 (0Cr17Ni12Mo2),
and so on, 3 series of steel. Because of the differences in
chemical composition of the two resulting in their ability to
resist corrosion is different, like 2 series of stainless steel is
generally not resistant to corrosion of chemical media, and 3
series of stainless steel have the ability to resist corrosion of
chemical media.
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