MATERIAL TERMINOLOGY
PA6G, PA6C and MC Nylon Terminology
PA6G and PA6C are commonly used designations for cast polyamide 6. MC Nylon is also used in the market for cast nylon material. The exact formulation, modifier, color and product-form availability must be confirmed for the quoted item.
Stock shapes can be supplied as rods, tubes, sheets and plates. The same material family can also be cast closer to a required geometry or machined into finished parts.
SELECTION OVERVIEW
Choose by Load, Motion and Environment
The right grade depends on the complete operating condition. A color may be used for identification, but similar colors can represent different formulations.
- Load, contact pressure and duty cycle
- Rotating, sliding, guiding or intermittent motion
- Normal and peak temperature
- Dry running, external lubrication or internal lubricant requirement
- Water, humidity, oils, greases and chemical exposure
- Impact, vibration and possible misalignment
- Critical fits, tolerances and compliance documents
GRADE FAMILIES
Grade Families for Technical Review
| Grade family | Modifier / typical color | Selection focus | Typical component context |
|---|---|---|---|
| Standard unfilled Cast Nylon 6 | PA6G / PA6C; natural or ivory | Balanced machinability and general industrial use | Gears, sheaves, rollers, bushings and spacers |
| MoS₂-filled Cast Nylon 6 | Molybdenum disulfide; dark grey or black | Rigidity, wear and dimensional considerations | Heavy-duty sheaves, rollers, bushings and wear pads |
| Oil-filled Cast Nylon 6 | Dispersed lubricant; green is common | Friction and lubrication conditions | Bushings, bearings, guide wheels, slide blocks and wear pads |
| Heat-stabilized Cast Nylon 6 | Heat-stabilizer package; some industry-reference grades are blue | Elevated-temperature exposure and thermal aging | Bearings, rollers and guides |
| PA6/12 copolymer cast nylon | Nylon 12 comonomer; natural or ivory | Moisture, dimensional stability, resilience and impact | Precision bushings, valve seats, marine and wet-service parts |
Availability depends on product form, dimensions, quantity and the manufacturing route. Confirm the exact formulation and supporting technical data before production.
STANDARD UNFILLED PA6G / PA6C
Typical Reference Properties
The following values are supplied as baseline reference data for standard unfilled cast nylon 6. They are not guaranteed specifications, design limits or acceptance criteria.
| Property | Test method | Unit | Typical value |
|---|---|---|---|
| Density | ISO 1183 | g/cm³ | 1.15 |
| Water absorption | ISO 62 | % | 2.5 |
| Tensile strength at yield | ISO 527-2 | MPa | 80 |
| Elongation at break | ISO 527-2 | % | 3 |
| Tensile modulus | ISO 527-2 | MPa | 3,300 |
| Hardness | DIN 53505 | Shore D | 84 |
| Charpy impact strength, 23°C | ISO 179 | kJ/m² | No Break |
| Coefficient of friction | DIN 53375 | — | 0.36 |
| Heat deflection temperature | ISO 75-2 | °C | 95 |
| Service temperature, short term | — | °C | 180 |
| Service temperature, long term | — | °C | 105 |
| Thermal conductivity, 23°C | — | W/(m·K) | 0.23 |
| Linear thermal expansion | ISO 11359 | 10⁻⁴ K⁻¹ | 0.8 |
Water-absorption conditioning, ISO 75-2 load condition and several service-temperature conditions were not stated in the supplied source. Use these values only for preliminary screening and confirm the applicable technical data for the selected grade and order.
SELECTION FACTORS
Information That Changes the Material Decision
Load & Pressure
Define static, dynamic and contact loads, including shock or edge loading.
Speed & Motion
Describe speed, stroke, rotation, sliding direction and duty cycle.
Temperature
Provide normal and peak temperatures, exposure time and nearby heat sources.
Lubrication
State whether the application runs dry, uses external lubrication or requires a self-lubricating grade.
Moisture & Chemicals
Identify water, humidity, oils, greases, cleaning agents and chemicals.
Impact & Vibration
Describe shock, vibration, deflection and possible misalignment.
Tolerance & Compliance
List critical fits, dimensional stability needs and required documents.
PRODUCT FORMS
Apply the Grade to the Right Product Form
Not every grade, color and size combination is available in every product form. Confirm the combination before final material approval.
MATERIAL SELECTION DISCLAIMER
Use Typical Data for Screening—Not Final Design Approval
Material behavior depends on grade, color or additive package, dimensions, moisture conditioning, specimen preparation, test method, load, speed, temperature, lubrication, mating surface and environment. Final selection remains the buyer’s engineering responsibility and should use the data and acceptance requirements confirmed for the quoted material.
GRADE GUIDANCE
Need Help Screening a Cast Nylon Grade?
Share the component function, drawing, dimensions, load, motion, temperature, lubrication, environment, quantity and required documents.