Crastin® HR5330HFS BK591

Alternative and trade names
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Crastin® HR5330HFS BK591 is a 30% Glass Reinforced Polybutylene Terephthalate with high flow, moderately toughened, and hydrolysis resistant (HR) for injection molding.

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

1.5 g/cm³

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ISO 1183

Water absorption

23.0 °C

0.35 %

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Sim. to ISO 62 | 80mil



Elastic modulus

23.0 °C

8.5 GPa

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ISO 527-1/-2


23.0 °C

3.2 %

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ISO 527-1/-2

Flexural strength

23.0 °C

180 MPa

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ISO 178

Impact strength, Charpy notched

23.0 °C

12 kJ/m²

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ISO 179/1eA

Impact strength, Charpy unnotched

23.0 °C

70 kJ/m²

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ISO 179/1eU

Poisson's ratio

23.0 °C

0.34 [-]

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Tensile strength

23.0 °C

120 MPa

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ISO 527-1/-2



Coefficient of thermal expansion

23.0 °C

2.2E-5 1/K

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ISO 11359-1/-2

Coefficient of thermal expansion, transverse

23.0 °C

1.9E-4 1/K

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ISO 11359-1/-2

Glass transition temperature

65 °C

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ISO 11357-1/-2 | 18°F/min

Heat deflection temperature, 1.80 MPa

205 °C

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ISO 75-1/-2

Melting point

225 °C

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ISO 11357-1/-3 | 18°F/min

Relative temperature index, mechanical strength

192 °C

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IEC 60216-1 | 5000 hours


Burning Behav. at thickness h: HB class, Thickness tested: 0.75 mm, UL recognition: yes -, Oxygen index: 20 %, FMVSS Class: B -, Burning rate, Thickness 1 mm: 30 mm/min



Comparative tracking index

23.0 °C

1 V

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UL 746A

Dielectric strength

23.0 °C

34 kV/mm

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IEC 60243-1

Surface resistivity

23.0 °C

1.00E+15 Ω/sq

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min. | IEC 62631-3-2

Volume resistivity

23.0 °C

1.00E+15 Ω·cm

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min. | IEC 62631-3-1

Rheological Properties


Melt mass-flow rate

13 g/10min

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ISO 1133 | 250°C/2.16kg

Melt viscosity

250.0 °C

230 Pa·s

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ISO 11443 | @ 1000 sec-1, 250°C

Melt volume-flow rate

8 cm³/10min

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ISO 1133


23.0 °C

0.3 %

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ISO 294-4, 2577

Shrinkage, transverse

23.0 °C

1.1 %

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ISO 294-4, 2577

Technological properties


30% Glass Fiber

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: 3s/mm, Back pressure: As low as possible, Ejection temperature: 170°C