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What is the difference between Cast Nylon and Extruded Nylon?

At a glance

  • Discover the Strength: Extruded nylon offers high tensile strength, durability, and low friction, making it ideal for heavy-duty applications.
  • ePol's Reliability: Trust ePol for a consistent and cost-effective supply of top-notch extruded nylon materials.
  • Versatile Applications: From bearings and gears to electrical components, explore the wide range of industries benefiting from extruded nylon's exceptional properties.

 

 

In the world of engineering materials, nylon stands out as one of the most versatile and widely used thermoplastics. Its applications are virtually limitless, making it a favourite choice across various industries. However, within the realm of nylon, two primary variations exist: cast nylon and extruded nylon.

 

While these materials might seem similar at first glance, they have distinct differences that impact their performance and applications. In this detailed article, we will delve into the properties of cast nylon, explore its advantages over extruded nylon, and provide readers with a comprehensive understanding of these essential engineering materials.

 

Understanding Cast Nylon

 

Nylon, in general, boasts exceptional mechanical properties, making it a preferred choice for engineering machines and instruments. What makes nylon, and particularly cast nylon, special are its unique characteristics:

 

Mechanical Performance:

Cast nylon exhibits remarkable toughness, strength, and a low coefficient of friction. These properties make it an excellent choice for applications requiring durability and wear resistance.

 

Cost-Effective:

Nylon's cost is significantly lower compared to alternative materials like metal and rubber. This affordability makes it an attractive option for budget-conscious projects.

 

Advantages of Cast Nylon Over Extruded Nylon

 

While both cast and extruded nylon have their merits, cast nylon holds several advantages, especially in specific scenarios:

 

Cost-Efficiency

Cast nylon is typically more cost-effective to produce, particularly for larger and complex parts. This cost advantage can be a significant factor in project budgets.

 

Lower Stress Levels

Cast nylon materials inherently have lower stress levels compared to extruded nylon. This results in improved dimensional stability, easier machining, and higher compressive and tensile strength.

 

Higher Operating Temperature

For projects requiring parts that can withstand high temperatures, cast nylon outperforms extruded nylon. Cast nylon has a slightly higher operating temperature, expanding its range of applications.

 

Customisability

At Piedmont Plastics, cast nylon is available in various customisable options and colours, allowing for tailored solutions to meet specific project requirements.

 

Industry Applications

 

Both cast and extruded nylon find applications in various industries. While they can be used interchangeably in some cases, their specific applications may differ:

 

Boom Trucks and Outrigger Pads

The durability and load-bearing capacity of cast nylon make it suitable for applications like boom trucks and outrigger pads, where stability and strength are paramount.

 

Bearings and Bushings

Cast nylon's low friction and high strength properties make it ideal for manufacturing bearings and bushings, ensuring smooth and reliable operation.

 

Seals and Gaskets

Cast nylon's resistance to wear and its ability to maintain dimensional stability under pressure make it a preferred choice for seals and gaskets.

 

Star Wheels

Cast nylon's toughness and low friction properties are well-suited for star wheels used in various machinery and conveyor systems.

 

Thrust Washers

In applications requiring high load-bearing capacity, cast nylon's compressive strength makes it an excellent choice for thrust washers.

 

Valve Seats

Cast nylon's ability to withstand temperature variations and resistance to wear make it an ideal material for valve seats in industrial settings.

 

Cast Nylon vs. Extruded Nylon

 

Let's examine a detailed property comparison between cast nylon and extruded nylon, specifically focusing on Nycast® 6pa Natural and Extruded Natural Nylon 6/6: 

 

 

Property

Units

ASTM Test Method

Nycast ® 6 pa Natural

Extruded Nylon 6/6

Specific Gravity

g/cm3

D792

1.15-1.17

1.15

Tensile Strength

psi

D638

10,000 – 13,500

11,500

Tensile Elongation

%

D638

20 – 55

50

Tensile Modulus

psi

D638

400,000 – 550,000

425,000

Compressive Strength

psi

D695

13,500 – 16,000

12,500

Compressive Modulus

psi

D695

325,000 – 400,000

420,000

Flexural Strength

psi

D790

15,500 – 17,500

15,000

Flexural Modulus

psi

D790

420,000 – 500,000

450,000

Shear Strength

psi

D732

10,000 – 11,000

10,000

Notched Izod Impact

ft.lbs./in.

D256

0.7 – 0.9

0.6

Hardness, Rockwell R

-

D785

115 – 125

115

Hardness, Shore D

-

D2240

78 – 83

NV

Melting Point

deg. F

D789/D3418

450 +/- 10

500

Coefficient Of Linear Thermal Expansion

in./in./F

D696/E831

6.1 x 10 (-5)

5.5 x 10 (-5)

Deformation Under Load

%

D621

0.5 – 2.5

NV

Deflection Temperature (264 psi)

deg. F

D648

200-400

200

Deflection Temperature (66 psi)

deg. F

D648

400-430

N/A

Continuous Service Temperature

deg. F

-

230

210

Intermittent Service Temperature

deg. F

-

330

NV

Coefficient Of Friction: Dynamic

-

D1894

0.22

-

Water Absorption – 24 Hours

%

D570

0.5-0.6

0.3

Water Absorption – Saturation

%

D570

5.0-6.0

7

Dielectric Strength

-

-

500-600

400

Dielectric Constant (60 Cycles)

-

-

3.7

3.6

Dielectric Constant (1000 Cycles)

-

-

3.7

3.6

Dielectric Constant (100,000 Cycles)

-

-

3.7

3.6

 

 

Best source for high-quality engineering plastics online

 

ePol plays a significant role in the supply chain of nylon materials, including cast and extruded nylon. As a trusted supplier, ePol connects manufacturers and industries with high-quality nylon products sourced from various reputable manufacturers worldwide. Their commitment to delivering top-notch materials and expertise in plastics procurement makes them a valuable partner in ensuring a steady and reliable supply of nylon for a diverse range of applications.

 

Whether it's providing the essential components for machinery, bearings, seals, or other critical applications, ePol's dedication to quality and efficiency contributes significantly to the success of industries that rely on nylon materials, helping them achieve optimal performance, longevity, and cost-effectiveness in their operations.

 

Our range of cast nylon products, proudly represented by the trusted brand Dynex, provides access to high-quality materials tailored to meet your specific engineering requirements, whether you need rods or sheets.

 

While choosing between cast nylon and extruded nylon depends on specific project requirements, the advantages of cast nylon often outweigh those of its extruded counterpart. Cast nylon's lower cost, superior dimensional stability, and higher operating temperature make it a valuable choice for various engineering applications. As you embark on your next project, consider the unique properties and benefits of cast nylon, and explore how this exceptional material can enhance the performance and longevity of your components.

For more insights and information on cast nylon, visit trusted suppliers, ePol.

 

When it comes to engineering materials, the choice matters, and cast nylon proves to be a winning solution for many applications. Explore the possibilities, and unlock the potential of this remarkable engineering material.