Crastin® FGS600F40 BK594

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Crastin® FGS600F40 BK594 is an unreinforced lubricated, low viscosity polybutylene terephthalate resin for injection molding. It has been developed for consideration into applications such as parts for the food industry.FOOD CONTACTThis product is manufactured according to Good Manufacturing Practice (GMP) principles and generally accepted in food contact applications in Europe and the USA when meeting applicable use conditions. For details, individual compliance statements are available from your DuPont representative.

This material data has been provided by Matmatch.

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.

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23.0 °C

1.31 g/cm³

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ISO 1183

Water absorption

23.0 °C

0.4 %

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Sim. to ISO 62 | 80mil



Elastic modulus

23.0 °C

2.7 GPa

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ISO 527-1/-2


23.0 °C

30 %

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ISO 527-1/-2 | 50mm/min

Elongation at yield

23.0 °C

10 %

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ISO 527-1/-2

Flexural modulus

23.0 °C

2.5 GPa

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ISO 178

Impact strength, Charpy notched

23.0 °C

4 kJ/m²

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ISO 179/1eA

Poisson's ratio

23.0 °C

0.38 [-]

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Yield strength

23.0 °C

58 MPa

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ISO 527-1/-2

Impact strength, Charpy unnotched

No Break @ 23°C, ISO 179/1eU



Coefficient of thermal expansion

23.0 °C

1.1E-4 1/K

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ISO 11359-1/-2

Coefficient of thermal expansion, transverse

23.0 °C

1.2E-4 1/K

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ISO 11359-1/-2

Glass transition temperature

55 °C

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ISO 11357-1/-2 | 18°F/min

Heat deflection temperature, 1.80 MPa

57 °C

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ISO 75-1/-2

Melting point

225 °C

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ISO 11357-1/-3 | 18°F/min

Specific heat capacity

23.0 °C

2110 J/(kg·K)

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of melt


Burning Behav. at 60mil nom. thickn.: HB class, Thickness tested: 1.5 mm, Oxygen index: 22 %, FMVSS Class: B -, Burning rate, Thickness 1 mm: <80 mm/min

Rheological Properties


Melt mass-flow rate

36 g/10min

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ISO 1133 | 250°C/2.16kg


23.0 °C

1.8 %

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ISO 294-4, 2577

Shrinkage, transverse

23.0 °C

1.8 %

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ISO 294-4, 2577

Technological properties

Processing methods

Drying Recommended: yes, Drying Temperature: 120°C, Drying Time, Dehumidified Dryer: 2-4h, Processing Moisture Content: ≤0.04%, Melt Temperature Optimum: 250°C, Min. melt temperature: 240°C, Max. melt temperature: 260°C, Mold Temperature Optimum: 80°C, Min. mold temperature: 30°C, Max. mold temperature: 130°C, Hold pressure range: ≥60MPa, Hold pressure time: 4s/mm, Back pressure: As low as possible, Ejection temperature: 170°C