| CNC Machining Material


Furthermore, our production lines possess the capability to manufacture precision plastic parts through the utilization of CNC milling machine centers and automatic CNC Lathe machines. This enables us to deliver high-precision plastic components with utmost accuracy and efficiency.

Material Accessibility:

ABS, UDPE, HDPE, LDPE, Nylon 6, Nylon 66, MC Nylon, PC, PEEK

PET-P(Ertalyte), PFA, POM(Acetal), PP, PPS(Techtron), Teflon(PTFE)

Glass-filled plastics are also readily accessible for CNC machining processes. 

Acetal (POM, Delrin)

Acetal, also known as polyoxymethylene (POM) or Delrin, is a thermoplastic material widely employed in precision CNC machining applications. Renowned for its exceptional properties, it offers high stiffness, excellent heat resistance, low friction, remarkable dimensional stability, outstanding dielectric properties, moisture resistance, wear resistance, and chemical resistance. Its superior machinability makes it an ideal choice for CNC machining services. Acetal finds broad applications across various industries, including the food industry, chemical industry, bearing manufacturing, diving equipment, conventional machinery, gear production, and toy manufacturing.

ABS (Acrylonitrile Butadiene Styrene)

ABS (Acrylonitrile Butadiene Styrene) is a widely recognized and cost-effective engineering plastic suitable for CNC machining processes. It exhibits exceptional impact strength, toughness, and good tensile strength, making it highly desirable for various CNC machining operations such as turning, drilling, milling, and sawing. As a result, ABS is extensively utilized in the production of consumer products and numerous automotive and truck components. Its versatility, affordability, and favorable mechanical properties make ABS a popular choice in CNC machining applications.

Acrylic (methyl methacrylate, PMMA)

Acrylic, also known as methyl methacrylate (PMMA), is a widely recognized thermoplastic material that is often supplied in a transparent form. It serves as a popular alternative to glass due to its lightweight nature and shatter-resistant properties.

Our CNC machining production lines possess extensive expertise in precision milling, bonding, and polishing of acrylic components with exceptional accuracy. While acrylic materials may be susceptible to failure under tensile or compressive forces, CNC milling enables efficient and precise machining processes for acrylic.

Acrylic is predominantly utilized in industries such as optics and automotive due to its favorable optical and physical properties. Its transparency and clarity make it ideal for optical applications, while its lightweight and impact resistance make it suitable for automotive components.

Nylon (Nylon 6, Nylon 66, PA, MC Nylon)

Alloy Steel, Carbon Steel

Assorted Alloy Steel Types

Alloy steel refers to a type of carbon steel that has been intentionally alloyed with various elements to enhance its mechanical properties. These elements are added to improve characteristics such as strength, hardness, toughness, wear resistance, corrosion resistance, and hardenability. In some instances, heat treatment is necessary to achieve the desired improved properties mentioned above. Alloy steel offers superior performance compared to conventional carbon steel, making it a preferred choice in applications requiring enhanced mechanical properties.

AISI 4140 (SCM 440, 42CrMo4)

The most commonly used alloy steel in CNC machining services is known for its moderate machinability, excellent strength and stiffness, and good weldability. It is particularly well-suited for structural purposes. This type of alloy steel finds widespread application in the manufacturing of shafts, transmission components, gears, molds, and cold-forged automotive and industrial spare parts. Its combination of mechanical properties and ease of machining make it a preferred material choice for various CNC machining applications in multiple industries.

AISI 4340 (SNCM 439, 40CrNiMoA)

In its heat-treated condition, this alloy steel exhibits high toughness and strength, making it suitable for demanding applications. In the annealed state, it demonstrates good ductility and formability. With average machinability and welding capability, it offers versatility in manufacturing processes. This alloy steel is primarily utilized in power transmission gears and shafts, aircraft landing gear, and various structural parts. Its exceptional combination of mechanical properties and adaptability makes it a preferred choice for applications requiring strength, toughness, and formability.

AISI 8620 (SCNM 220, 21NiCrMo2)

The common alloy steel used in industrial bearings exhibits high hardness and corrosion resistance. After undergoing carburizing treatment, it acquires excellent contact fatigue strength. Notably, the core of the component maintains its toughness and malleability. This alloy steel finds extensive application in internal engine components, suspension parts, bushings, and automotive components due to its exceptional properties.

AISI 4115 (SNCM 415, 15CrMo5)

Typically employed after carburization, this alloy steel attains a surface hardness ranging from HRC 56-60 through case hardening. Its primary applications include pistons, transmission shafts, gears, and spindles.

*Ref 1. Alloy Steel

Diverse Carbon Steel Types

In simple terms, carbon steel refers to a type of steel that contains carbon in a concentration of less than 2.1% by weight. It is commonly used to describe steel that is non-stainless. As the carbon content increases, carbon steel exhibits improved machinability and can be hardened and strengthened through heat treatment. However, higher carbon content can result in reduced ductility.

AISI 12L14 (JIS SUM24L, DIN 9SMnPb36, free cutting steel)

Free cutting steel, also known as AISI 12L14, is renowned for its exceptional CNC machining capability. When dosed with lead, its machinability is significantly enhanced. It can be subjected to case hardening treatment, resulting in a surface hardness of HV450. This type of steel is available in square, round, and hexagon forms, offering versatility in various applications. It finds widespread use in the manufacturing of shafts, bolts, valves, bushings, pins, fittings, machine screws, surgical and dental instruments, specific automotive components, and instruments, among others.

AISI 1215 (JIS SUM23, DIN 9SMn36, free cutting steel)

AISI 1215 is a type of free machining steel that has been resulphurized and rephosphorized, resulting in excellent machinability. When machined, it produces small chips, which aids in the machining process. To enhance its resistance to corrosion, AISI 1215 steel can be nickel plated, chrome plated, or zinc plated. It is primarily supplied for heavily machined components and parts that experience low stress levels and minimal shock loading.

AISI 1015 (JIS S15C)

AISI 1015 is a commonly utilized low carbon steel known for its favorable properties. While it has lower strength compared to medium carbon steel, it exhibits good toughness, weldability, and punching press properties. This makes AISI 1015 suitable for manufacturing applications such as chain production, rivets, bolts, and shafts. Its combination of properties makes it a reliable choice for applications that require a balance between strength and workability.

AISI 1045 (JIS S45C)

Medium carbon steel is a commonly employed type of steel known for its advantageous properties. It exhibits good wear resistance and high strength, making it suitable for demanding applications. Through heat treatment, it can be hardened to achieve a surface hardness of up to HRC 45. This versatility allows for its wide usage in mechanical parts and structural steel components. Common applications include sleeves, automobile shells, pistons, steam turbines, machine shafts, worms, gears, crankshafts, and spindles. The combination of wear resistance, strength, and machinability makes medium carbon steel a reliable choice for various industrial applications.

AISI 1144 (JIS SUM43, free cutting medium carbon steel)

A commonly utilized medium carbon steel is known for its enhanced machinability, thanks to the inclusion of sulfur. This type of steel is commonly referred to as free cutting medium carbon steel. In addition to its improved machinability, it also exhibits good wear resistance and high strength. It finds primary application in the manufacturing of transmission components, including gears, shafts, bolts, valves, bushings, pins, fittings, spring seats, and machine screws. Moreover, it is used in surgical and dental medical components, automobile parts, industrial instrument spare parts, and more. The combination of machinability, wear resistance, and strength makes this medium carbon steel a preferred choice for various industrial sectors.

JIS SK4 (SK95)

High carbon tool steel, characterized by a carbon content ranging from 0.9% to 1.0% by weight, is renowned for its exceptional toughness, high strength, and excellent wear resistance. It exhibits high hardenability, allowing it to attain a minimum hardness of HRC 62 when tempered. Additionally, it experiences minimal deformation during the quenching process. This type of steel finds wide application across various industries, including the manufacturing of regular springs, spiral springs, knitting needles, horns, measuring tapes, pins, shafts, plug gauges, and washers. Its unique combination of properties makes high carbon tool steel a preferred choice for applications requiring durability, strength, and wear resistance.

JIS SK5 (SK85, spring steel)

JIS SK5 is a widely used high carbon tool steel that contains approximately 0.8-0.9% carbon by weight. It is known for its exceptional toughness, high strength, and good anti-corrosion properties. With high hardenability, it can be tempered to achieve a minimum hardness of HRC 62, while experiencing minimal deformation during quenching. To enhance the springiness of machined parts made from JIS SK5, tempering treatment is necessary. This type of steel is commonly supplied for various industrial components, including automobile parts, blades, regular springs, clips, and washers. Its combination of toughness, strength, anti-corrosion properties, and springiness makes JIS SK5 a reliable choice for a range of industrial applications.

JIS SK7 (SK65, spring steel)

JIS SK7 is a widely used high carbon tool steel that contains approximately 0.6-0.7% carbon by weight. It is known for its high hardenability, allowing it to achieve a minimum hardness of HRC 59 when tempered. During the quenching process, JIS SK7 experiences minimal deformation. Tempering treatment is necessary to enhance the springiness of machined parts made from this steel. It is commonly supplied for a variety of industrial components, including automobile parts, coil springs, clip springs, and washers. The combination of high hardenability, minimal deformation, and improved springiness makes JIS SK7 a preferred choice for these industrial applications.

*Ref 2. Carbon steel

*Ref 3. Free Cutting Steel: This type of steel facilitates the operation of CNC lathes with automatic feeding systems, allowing them to run autonomously without the need for human intervention. This not only enhances efficiency but also provides economic benefits. By eliminating the need for constant human interaction, the production process becomes more streamlined and cost-effective.

Aluminum Alloy

Our core CNC machining service specializes in producing aluminum parts that offer a combination of affordability, lightweight design, and aesthetic appeal. Aluminum alloys (Ref*) are particularly cost-effective because they can be machined more efficiently compared to other metals like steel. While CNC machining aluminum parts can be left as is, we also offer the option of supplying anodized aluminum parts in a variety of colors. Additionally, plain aluminum naturally forms a thin protective layer when exposed to the atmosphere, making it resistant to corrosion.

Aluminum boasts excellent machinability and a high strength-to-weight ratio. Furthermore, its superior conductivity of electricity and heat makes it an ideal choice for applications requiring heat sinks.

Different types of Aluminum Alloy

The following are commonly utilized and supplied aluminum alloys at Overland:

Aluminum 1050

This alloy is widely recognized as part of the commercially pure 1XXX series of aluminum-based alloys. It is known for its remarkable softness and malleability, typically shaped through extrusion or rolling processes. It finds extensive application in the electrical and chemical industries due to its exceptional electrical conductivity, corrosion resistance, and workability. The alloy’s high electrical conductivity makes it suitable for electrical components, while its corrosion resistance ensures durability in chemical environments. Moreover, its excellent workability allows for easy shaping and fabrication into desired forms.

Aluminum 2024

The 2024 aluminum alloy is commonly employed in applications that demand a favorable strength-to-weight ratio and excellent fatigue resistance. It exhibits weldability through friction welding and possesses moderate machinability. This alloy finds widespread use in the aerospace industry, particularly for aircraft structures subjected to tension, such as wing and fuselage structures. Its high strength-to-weight ratio allows for lighter aircraft designs without compromising structural integrity, while its fatigue resistance ensures long-term durability under cyclic loading conditions. The 2024 alloy’s unique combination of properties makes it a preferred choice for critical components in the aerospace sector.

Aluminum 5052

The most frequently used aluminum alloys in sheet metal fabrication, including processes like stamping, laser engraving, and wire cutting, exhibit excellent machinability in bending, punching, and shearing operations. These alloys are specifically chosen for their favorable properties in sheet metal applications. They can be easily formed into desired shapes through processes like stamping, while laser engraving and wire cutting techniques allow for precise and intricate designs. The alloys’ good machinability ensures efficient and accurate fabrication processes, resulting in high-quality sheet metal components.

Aluminum 6061-T6

This alloy has strong mechanical properties, is easily weldable, and finds widespread use in architectural applications. It is commonly utilized in extruded shapes for window frames, door frames, customized profiles, piping, tubing, and furniture.

Aluminum 6063-T5

This aluminum alloy offers excellent mechanical properties and is highly weldable. It is primarily used in extruded shapes for architectural applications, including window frames, door frames, customized frame profiles, piping, tubing, and furniture.

Aluminum 6082

This aluminum alloy offers excellent CNC machining capability and weldability, making it a popular choice for general-purpose applications. It is extensively used in aerospace construction, as well as for frames, device housings, utility boats, bicycle frames, and components. Additionally, it is commonly employed in the manufacturing of automotive and industrial spare parts.

Aluminum 7075

This strong aluminum alloy exhibits good fatigue strength and moderate machinability. However, it is not suitable for welding and comes with a relatively high cost. It is commonly employed in aircraft applications, including wings and fuselages, as well as in the production of rock climbing equipment and bicycle components.

Brass, Bronze, Copper

Stainless Steel

We take great pride in our exceptional production capabilities for stainless steel parts. Overland is a leading global manufacturer with extensive expertise in CNC machining services for stainless steel milling and turning parts.

Material availability:

Stainless Steel

303, 304(18-8), 304L, 316(18-10), 316F, 316L

410, 3Cr12L, 420, 430, 440C, 630(17-4) (can be hardened by heat treating)

Contact us now for a complimentary project review of your precision CNC machining stainless steel parts.

Material for CNC Machining Service

CNC machining offers a wide range of material options, allowing for endless possibilities in manufacturing. Whether it’s metal, plastic, wood, or wax, CNC machines can handle diverse materials, providing ample choices for design and production. In summary, the key advantage of CNC machining services lies in the versatility of materials, offering abundant options for manufacturing needs.

Material Capability

OVERLAND-CNC provides an extensive range of materials for custom parts, including aluminum, carbon steel, stainless steel, copper, brass, nylon, polycarbonate, acrylic, and more. We offer materials in rod, tube, sheet metal, and bulk profiles, allowing for optimized production arrangements.

Tips of Choosing Material

Choosing the right material for your CNC machined part can be challenging, as it depends on several factors such as price, hardness, tolerance, environment, and surface treatment requirements.

Below are some tips:

  • Metals offer superior tolerance in CNC machining compared to plastics.
  • Plastics are lightweight but may experience slight deformation over time due to moisture absorption.
  • Sheet metal parts are typically more cost-effective compared to machining from plate or rod.
  • Materials that require minimal finishing, such as stainless steel, plastics, and titanium, can be more cost-effective for faster production.