M8 M12 Mild steel Flat & CSK Head Machine Screw grade 4.8 Zinc
plating Blue white
Product Description:
A machine screw is a fastener that is used like any other fastener
to join two or more objects. However, machine screws are unique
because of their size. The American Society of Mechanical Engineers
(ASME) defines machine screws as having a diameter of no more than
0.75 inches. They can be less than 0.75 inches in diameter, but no
larger. As a result, machine screws are generally smaller than most
other types of screws.
In addition to being 0.75 inches or less in diameter, machine
screws also feature a uniform thread. What exactly does this mean?
Well, screws typically have uniform or tapered threads. Uniform
threads mean that the external threads (the spiral ridges on the
outside of the screw) remain the same size from the top to the
bottom of the screw. In contrast, tapered threads mean that the
threads of the screw expand in taper or towards the bottom. Machine
screws have a uniform thread that remains the same size from top to
bottom.
Advantages of Machine Screws
Machine screws are often preferred over other, larger screws. Due
to their small size, they offer a wider range of applications.
Machine screws can be used to attach countless types of products,
objects, and surfaces.
Machine screws are also available in different materials. Stainless
steel is a common material used to manufacture machine screws. It
is strong and durable and provides a high level of protection
against rust and corrosion. Aluminium is another common material
used to manufacture machine screws. Like stainless steel, it offers
protection against rust and corrosion. Aluminium machine screws are
not as strong as stainless steel screws, but they are also not as
heavy. For applications where weight is a concern, aluminium
machine screws may be preferred!
Applications
Carbon steel is a common metal material+ with a range of advantages
and disadvantages. The characteristics of carbon steel materials
are discussed below:.
Advantages.
1.High Strength:Carbon steel has excellent strength properties and
is capable of withstanding large external forces and pressures.
This has led to the use of carbon steel in many engineering
applications such as construction, automotive manufacturing and
aerospace.
2. Good Wear Resistance:Carbon steel has high wear resistance and
is able to resist abrasion and scratches. This makes carbon steel
ideal for the manufacture of cutting tools, machine parts and
industrial equipment.
3. Plasticity: Carbon steel is easy to machine and form, and can be
plastically deformed by cold working, hot working, and forging
processes + this plasticity makes carbon steel suitable for the
manufacture of a variety of complex shapes and structures.
4. Economical price: Compared with other metal materials, carbon
steel production costs are relatively low, so the price is
relatively economical. This gives carbon steel a competitive
advantage in large-scale industrial applications.
Disadvantages.
1.Corrosion tendency:Carbon steel is susceptible to oxidation and
corrosion. When carbon steel is exposed to moisture or comes into
contact with acids, it tends to corrode, leading to material
damage. To reduce the risk of corrosion, it is often necessary to
treat carbon steel against corrosion or use anti-corrosion
coatings.
2. Low Seismic Resistance:Compared to other high-strength alloy
materials, carbon steel has poor seismic resistance. In an
earthquake or other vibration environment, carbon steel structures
are prone to deformation or instability, which may lead to
structural damage and safety hazards.
3. High Electrical and Thermal Conductivity:Carbon steel has good
electrical and thermal conductivity, which can cause problems in
certain specific applications. For example, in the field of
electronic equipment manufacturing, the electrical conductivity of
carbon steel may interfere with the normal operation of the
circuit.
4. High Density:The relatively high density of carbon steel makes
carbon steel materials heavier than other light alloys for the same
volume. This may be less desirable in certain applications where
weight reduction is required, such as in aerospace.
In summary, carbon steel materials have the advantages of high
strength, good wear resistance and malleability, but they also have
the disadvantages of corrosion tendency, low vibration resistance,
high electrical and thermal conductivity and high density. When
choosing to use carbon steel materials, it is necessary to take
into account the specific application environment and requirements
to ensure that the suitability and performance of the material
meets the needs.
Galvanising is a surface treatment technique in which a layer of
zinc is deposited on the surface of a metal, alloy or other
material to provide aesthetic appeal, rust protection, etc. The
main method used is hot-dip galvanising The advantages of
galvanising include:
1, stop corrosive substances, extend the service life of the
substrate.
2, prevent rust.
3, Creates a sacrificial anode that provides protection for the
metal below.
4, Durable, providing decades of protection.
5, Affordable, simple and economical.
6, Creates a thick coating, thicker than electroplating, etc.
| 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 | / |
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