Zytel® 73G45 BK263

Alternative and trade names
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Common features of Zytel® nylon resin include mechanical and physical properties such as high mechanical strength, excellent balance of stiffness and toughness, good high temperature performance, good electrical and flammability properties, good abrasion and chemical resistance. In addition, Zytel® nylon resins are available in different modified and reinforced grades to create a wide range of products with tailored properties for specific processes and end-uses. Zytel® nylon resin, including most flame retardant grades, offer the ability to be coloured. The good melt stability of Zytel® nylon resin normally enables the recycling of properly handled production waste. If recycling is not possible, DuPont recommends, as the preferred option, incineration with energy recovery (-31kJ/g of base polymer) in appropriately equipped installations. For disposal, local regulations have to be observed.Zytel® nylon resin typically is used in demanding applications in the automotive, furniture, domestic appliances, sporting goods and construction industry.Zytel® 73G45 BK263 is a 45% glass fiber reinforced, black polyamide 6 resin for injection molding.

Equivalent Materials

This material data has been provided by Matmatch.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

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23.0 °C

1.51 g/cm³

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ISO 1183

Water absorption

23.0 °C

4.9 %

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Sim. to ISO 62 | 80mil



Elastic modulus

23.0 °C

14.2 GPa

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ISO 527-1/-2


23.0 °C

3 %

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ISO 527-1/-2

Impact strength, Charpy notched

23.0 °C

19 kJ/m²

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ISO 179/1eA

Impact strength, Charpy unnotched

23.0 °C

100 kJ/m²

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ISO 179/1eU

Impact strength, Izod unnotched

23.0 °C

17 kJ/m²

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ISO 180/1A

Poisson's ratio

23.0 °C

0.33 [-]

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Tensile strength

23.0 °C

215 MPa

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ISO 527-1/-2



Heat deflection temperature, 1.80 MPa

218 °C

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ISO 75-1/-2

Melting point

221 °C

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ISO 11357-1/-3 | 18°F/min

Specific heat capacity

23.0 °C

2100 J/(kg·K)

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of melt


FMVSS Class: B -, Burning rate, Thickness 1 mm: 44 mm/min



Comparative tracking index

23.0 °C

500 V

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IEC 60112

Rheological Properties



23.0 °C

0.1 %

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ISO 294-4, 2577

Shrinkage, transverse

23.0 °C

0.6 %

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ISO 294-4, 2577

Technological properties


45% Glass Fiber

Processing methods

Drying Recommended: yes, Drying Temperature: 80°C, Drying Time, Dehumidified Dryer: 2-4h, Processing Moisture Content: ≤0.2%, Melt Temperature Optimum: 270°C, Min. melt temperature: 260°C, Max. melt temperature: 280°C, Max. screw tangential speed: 0.2m/s, Mold Temperature Optimum: 100°C, Min. mold temperature: 70°C, Max. mold temperature: 120°C, Hold pressure range: 50-100MPa, Hold pressure time: 3s/mm, Ejection temperature: 210°C