Overview
Delrin® 500P is a high-performance injection molding grade of Polyoxymethylene Homopolymer (POM-H) designed to provide outstanding mechanical strength, fatigue resistance, dimensional stability, low friction, and excellent flow characteristics during molding.
As one of the most widely used Delrin grades, Delrin 500P combines the superior mechanical performance of homopolymer acetal with excellent processability, making it ideal for precision molded components in automotive, industrial, electrical, medical, and consumer applications.
Delrin 500P is widely used in:
- Precision Gears
- Mechanical Fasteners
- Automotive Components
- Electrical Connectors
- Bearings and Bushings
- Medical Device Components
- Consumer Products
- Industrial Machinery
Due to its excellent combination of strength, stiffness, and moldability, Delrin 500P is considered a benchmark engineering plastic for precision injection molded parts.
Material Specification
| Property | Value |
|---|---|
| Material Designation | Delrin® 500P |
| Full Name | Polyoxymethylene Homopolymer (POM-H) |
| Common Name | Delrin 500P |
| Material Family | Engineering Thermoplastic |
| Density | 1.41–1.42 g/cm³ |
| Appearance | Natural White, Black |
| Fillers | None |
| Typical Manufacturing Methods | Injection Molding, CNC Machining |
| Standard Forms | Pellets, Molded Parts |
Chemical Composition
Delrin 500P consists of highly crystalline polyoxymethylene homopolymer optimized for injection molding applications.
| Component | Function |
|---|---|
| Polyoxymethylene Homopolymer | Structural Matrix |
| Thermal Stabilizers | Processing Stability |
| Processing Additives | Mold Flow Optimization |
| Colorants (Optional) | Appearance Control |
Its high crystallinity provides superior mechanical performance and dimensional accuracy.
Mechanical Properties
Typical Values
| Property | Value |
|---|---|
| Tensile Strength | 68–75 MPa |
| Yield Strength | 65–72 MPa |
| Elongation at Break | 25–40% |
| Flexural Strength | 90–110 MPa |
| Flexural Modulus | 2.9–3.2 GPa |
| Hardness | Rockwell M90–95 |
| Compressive Strength | 95–120 MPa |
Typical Mechanical Performance
| Property | Performance |
|---|---|
| Strength | Outstanding |
| Stiffness | Outstanding |
| Fatigue Resistance | Outstanding |
| Impact Resistance | Good |
Delrin 500P provides exceptional long-term durability under repeated mechanical loading.
Physical Properties
| Property | Value |
|---|---|
| Density | 1.41–1.42 g/cm³ |
| Water Absorption | 0.2–0.8% |
| Thermal Conductivity | 0.31 W/m·K |
| Specific Heat Capacity | 1400 J/kg·K |
| Coefficient of Thermal Expansion | 110 ×10⁻⁶/°C |
Low moisture absorption contributes to excellent dimensional stability.
Thermal Properties
| Property | Value |
|---|---|
| Melting Point | 175–180°C |
| Heat Deflection Temperature | 120–125°C |
| Continuous Service Temperature | -40°C to 100°C |
| Short-Term Service Temperature | Up to 140°C |
Delrin 500P performs reliably across a broad range of industrial operating conditions.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| Delrin 500P | 1.42 | 72 MPa |
| POM-C | 1.41 | 65 MPa |
| Nylon 6 | 1.14 | 75 MPa |
| Aluminum 6061 | 2.70 | 310 MPa |
Delrin 500P offers an excellent balance between weight reduction and mechanical performance.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Water | Excellent |
| Oils & Greases | Excellent |
| Fuels | Excellent |
| Alcohols | Excellent |
| Hydrocarbons | Good |
| Dilute Alkalis | Good |
| Dilute Acids | Moderate |
| Strong Acids | Poor |
Delrin 500P is well suited for automotive and industrial fluid-contact applications.
Moisture Resistance
| Property | Performance |
|---|---|
| Water Absorption | Low |
| Humidity Resistance | Excellent |
| Dimensional Stability | Excellent |
| Environmental Resistance | Excellent |
The material maintains dimensional accuracy in humid environments.
Friction & Wear Properties
| Property | Value |
|---|---|
| Coefficient of Friction | 0.20–0.35 |
| Self-Lubricating Properties | Good |
| Wear Resistance | Excellent |
| Sliding Performance | Excellent |
Delrin 500P is commonly used in moving assemblies requiring low friction and long service life.
Electrical Properties
| Property | Value |
|---|---|
| Volume Resistivity | >10¹⁴ Ω·cm |
| Surface Resistivity | >10¹³ Ω |
| Dielectric Strength | 18–25 kV/mm |
| Dielectric Constant | 3.7 |
Excellent electrical insulation makes Delrin 500P suitable for electronic components.
Fatigue Resistance
| Property | Performance |
|---|---|
| Cyclic Loading Resistance | Outstanding |
| Creep Resistance | Excellent |
| Long-Term Mechanical Stability | Excellent |
| Gear Performance | Outstanding |
Delrin 500P is widely used in gears and mechanical systems subjected to repeated movement.
Injection Molding Performance
| Property | Performance |
|---|---|
| Mold Flow | Excellent |
| Cycle Time | Fast |
| Surface Finish | Excellent |
| Dimensional Accuracy | Outstanding |
Delrin 500P is specifically optimized for high-volume precision injection molding.
Machinability
| Process | Rating |
|---|---|
| CNC Milling | Outstanding |
| CNC Turning | Outstanding |
| Drilling | Outstanding |
| Tapping | Outstanding |
| Precision Machining | Outstanding |
Machinability Comparison
| Material | Machinability |
|---|---|
| Delrin 500P | Outstanding |
| POM-C | Excellent |
| Nylon | Good |
| PEEK | Excellent |
Although primarily a molding grade, Delrin 500P also machines exceptionally well.
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Injection Molding | Outstanding |
| CNC Machining | Excellent |
| Insert Molding | Excellent |
| Precision Manufacturing | Outstanding |
Delrin 500P is one of the most commonly used acetal grades in injection molding.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | POM-H |
| ISO | Polyoxymethylene Homopolymer |
| DIN | POM-H |
| JIS | POM-H |
| GB/T (China) | 聚甲醛均聚物（POM-H） |
| Delrin® Corporation | Delrin® 500P |
Available Forms
| Product Type | Availability |
|---|---|
| Pellets | Yes |
| Injection Molded Parts | Yes |
| Precision Components | Yes |
| CNC Machined Parts | Yes |
Typical Applications
Automotive Industry
- Fuel System Components
- Locking Mechanisms
- Interior Mechanical Assemblies
- Window Regulator Components
Industrial Machinery
- Precision Gears
- Bearings
- Rollers
- Conveyor Components
Electrical Industry
- Connector Housings
- Switch Components
- Insulating Structures
Medical Industry
- Medical Device Components
- Instrument Mechanisms
- Disposable Device Parts
Consumer Products
- Fasteners
- Appliance Components
- Sporting Equipment Parts
Automation Equipment
- Motion Control Components
- Guide Systems
- Mechanical Actuators
Advantages
Outstanding Injection Molding Performance
Excellent flow and dimensional accuracy for high-volume production.
Exceptional Fatigue Resistance
Ideal for moving mechanical components.
High Strength and Stiffness
Suitable for demanding engineering applications.
Low Friction Characteristics
Excellent for gears and wear components.
Excellent Dimensional Stability
Maintains tight tolerances over time.
Cost-Effective Engineering Solution
Combines performance with efficient manufacturing.
Limitations
Moderate Heat Resistance
Not intended for continuous operation above 100°C.
Limited UV Stability
Outdoor applications may require UV stabilization.
Sensitive to Strong Acids
Not suitable for highly acidic environments.
Lower Temperature Capability Than PEEK or PPS
Not intended for extreme thermal environments.
Comparison with Delrin Grades
| Property | Delrin 500P | Delrin 100 | Delrin AF |
|---|---|---|---|
| Injection Molding Performance | Outstanding | Excellent | Good |
| Strength | Excellent | Outstanding | Good |
| Wear Resistance | Excellent | Excellent | Outstanding |
| Friction | Low | Low | Very Low |
| Fatigue Resistance | Outstanding | Outstanding | Excellent |
Comparison with POM-C
| Property | Delrin 500P | POM-C |
|---|---|---|
| Strength | Higher | |
| Stiffness | Higher | |
| Fatigue Resistance | Better | |
| Molding Performance | Better | |
| Chemical Resistance | Slightly Lower |
Delrin 500P is commonly selected when maximum mechanical performance is required in molded parts.
Available Surface Finishes
Standard Finishes
- Molded Finish
- Natural Finish
- Matte Finish
Functional Finishes
- Precision Surface Finish
- Low-Friction Finish
- Engineering Component Finish
Specialty Grades
- Delrin 500P
- Delrin 100
- Delrin AF
- Glass Reinforced Delrin
- Medical Grade Delrin
Frequently Asked Questions (FAQ)
What is Delrin 500P?
Delrin 500P is a high-performance injection molding grade of POM-H acetal homopolymer offering excellent strength, fatigue resistance, and dimensional stability.
What is Delrin 500P used for?
Typical applications include:
- Gears
- Bearings
- Automotive Components
- Electrical Connectors
- Precision Mechanical Parts
Is Delrin 500P suitable for injection molding?
Yes. Delrin 500P is specifically designed for precision injection molding applications.
Is Delrin 500P easy to machine?
Yes. It offers outstanding CNC machining performance when secondary operations are required.
Why choose Delrin 500P?
Because it combines:
- Excellent Moldability
- High Strength
- Outstanding Fatigue Resistance
- Low Friction
- Dimensional Stability
What is the difference between Delrin 500P and Delrin 100?
Delrin 100 is optimized for maximum mechanical performance in machined applications, while Delrin 500P is optimized for precision injection molding and high-volume production.
Does GCNOV provide Delrin 500P manufacturing services?
Yes. GCNOV provides:
- Delrin 500P Injection Molding
- CNC Machining
- Precision Gear Manufacturing
- Automotive Component Production
- Prototype Development
- Low-Volume Production
- Mass Production
- Custom Engineering Plastic Components