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Common Materials used in CNC machining and their characteristics

Jun. 13, 2022

We focus on CNC Machining service for over 15 years, and we have experience in different materials, in general, we list some types of materials commonly used.

1, Precision high-quality steel parts CNC machining

45 # steel

45 steel is the term in GB, also called "oil steel", which has high strength and good machinability.

Material advantages:

With higher strength and better machinability, after appropriate heat treatment can obtain a certain toughness, and wear resistance. Easy to obtain materials, suitable for hydrogen welding and argon arc welding.


40 Cr steel

40 Cr is the standard steel number of GB in China. 40Cr steel is one of the most widely used steels in the machinery manufacturing industry.

Material advantages:

It has good comprehensive mechanical properties, good low-temperature impact toughness and low notch sensitivity. Steel has good hardenability. In addition to quenching and tempering, this steel is also suitable for cyaniding and high-frequency quenching. Good cutting performance.


Q235 steel

Q235 steel is a kind of carbon structural steel, the Q in the steel number represents the yield strength. Normally, the steel is used directly without heat treatment.

Material advantages:

With the increase of the thickness of the material and its yield value will decrease, due to moderate carbon content, comprehensive performance is better, strength, welding and other properties get a better match, it is the most widely used.


SUS304 steel

High-quality SUS304 parts CNC machining

SUS304 refers to 304 stainless steel, with good processing performance, and high toughness characteristics.

Material advantages:

It has good corrosion resistance, heat resistance, corrosion resistance, low-temperature strength and mechanical properties. Stamping bending is good in heat processing, no heat treatment hardening, and no magnetic.



2, Precision high-quality aluminium alloy parts CNC machining

Aluminium alloy 6061

6061 aluminium alloy is a high-quality aluminium alloy produced by the heat treatment pre-stretching process. Although its strength cannot compare with that of the 2XXX series or 7XXX series, it has more characteristics of magnesium and silicon alloy.

Material advantages:

It has excellent machining performance, excellent welding characteristics and electroplating properties, good corrosion resistance, high toughness and no deformation after processing, easy polishing, easy colouring, excellent oxidation effect and other excellent characteristics.

7075 aluminium alloy

7075 aluminium alloy is a cold-treated forging alloy, high strength, and far better than mild steel. The 7075 is one of the most powerful alloys commercially available.

Material advantages:

General corrosion resistance, good mechanical properties and anodic reaction. Better deep drilling performance, enhanced wear resistance of tools, better thread rolling system.


3, Precision high-quality copper parts CNC machining


Pure copper (also known as red copper) is a metal with excellent electrical conductivity and toughness and has a rosy red surface. But it is not pure copper, it contains 99.9% copper, and some other elements are added to improve the surface and performance.

Material advantages:

It has good electrical conductivity, thermal conductivity, ductility and corrosion resistance. Copper conductivity and thermal conductivity are second only to silver, widely used in making conductive and thermal equipment. Copper has good corrosion resistance in the atmosphere, seawater and some non-oxidizing acids (hydrochloric acid, dilute sulfuric acid), alkali, salt solution and a variety of organic acids (acetic acid, citric acid). It is used in the chemical industry.

It has good weldability and can be processed into various semi-finished products and finished products by cold and thermoplastic processing. In the 1970s, the output of red copper exceeded that of all other copper alloys.


4, Precision high-quality brass parts CNC machining


Brass is an alloy of copper and zinc. Brass consisting of copper and zinc

Material advantages:

It has high strength, high hardness and strong chemical corrosion resistance. The mechanical properties of cutting are also better.

Brass has strong wear resistance. Brass is also called special brass, it is a high strength, hardness, and strong chemical corrosion resistance. The mechanical properties of cutting are also higher. Made of brass seamless copper pipe, soft, strong wear resistance.

Of course, there are other kinds of materials used for CNC machining, if you are interesting, you can contact us for the details.