BASF Ultramid® A3WG7 HRX BK23591
Plastic Granules
ULTRAMID A3WG7 HRX BK23591 Glass Fibre Reinforced 35%
Ultramid® A3WG7 HRX BK23591 is a 35% glass-fibre reinforced PA66 from BASF. It is engineered for automotive cooling circuits. The HRX package delivers superior hydrolysis and heat-ageing resistance. Tensile modulus reaches 11,000 MPa. HDT/A hits 250 °C. Short-cycle service temperature up to 240 °C. Black, injection-ready.
Typical property data
Physical Properties
- Polymer Abbreviation: PA66-GF35
- Density: 1420 kg/m³ (ISO 1183)
- Bulk Density (granules): ≈ 0.7 g/cm³
- Viscosity Number (0.5% in 96% H₂SO₄): 155 cm³/g (ISO 307 / 1157 / 1628)
- Moisture Absorption, Equilibrium (23 °C / 50% r.h.): 1.4 – 1.8 % (similar to ISO 62)
- Water Absorption, Saturation (23 °C): 5 – 5.7 % (similar to ISO 62)
- Moulding Shrinkage, Constrained: 0.4 – 0.5 %
- Moulding Shrinkage, Parallel: 0.40 % (ISO 294-4)
- Moulding Shrinkage, Normal: 1.10 % (ISO 294-4)
Mechanical Properties
- Tensile Modulus: 11 000 / 7 300 MPa (ISO 527-1/-2)
- Stress at Break: 205 / 130 MPa (ISO 527-1/-2)
- Strain at Break: 3.4 / 5.7 % (ISO 527-1/-2)
- Tensile Creep Modulus, 1 000 h, strain ≤ 0.5%, 23 °C: — / 4 100 MPa (ISO 899-1)
- Flexural Modulus: 10 500 / 7 000 MPa (ISO 178)
- Flexural Strength: 310 / 200 MPa (ISO 178)
- Charpy Unnotched Impact Strength (23 °C): 100 / 105 kJ/m² (ISO 179/1eU)
- Charpy Unnotched Impact Strength (−30 °C): 85 / 95 kJ/m² (ISO 179/1eU)
- Charpy Notched Impact Strength (23 °C): 12 / 17 kJ/m² (ISO 179/1eA)
- Charpy Notched Impact Strength (−30 °C): 9.5 / 10 kJ/m² (ISO 179/1eA)
- Izod Notched Impact Strength (23 °C): 15 kJ/m² (ISO 180/A)
- Izod Unnotched Impact Strength (23 °C): 85 kJ/m² (ISO 180/U)
Thermal Properties
- Melting Temperature, DSC: 260 °C (ISO 11357-1/-3)
- Deflection Temperature under Load, HDT/A (1.8 MPa): 250 °C (ISO 75-1/-2)
- Deflection Temperature under Load, HDT/B (0.45 MPa): 260 °C (ISO 75-1/-2)
- Max. Service Temperature (short cycle operation): 240 °C
- Coefficient of Linear Thermal Expansion, Longitudinal (23–55 °C): 23 × 10⁻⁶ /K (ISO 11359-1/-2)
- Coefficient of Linear Thermal Expansion, Transverse (23–55 °C): 96 × 10⁻⁶ /K (ISO 11359-1/-2)
- Thermal Conductivity: 0.35 W/(m·K) (DIN 52612-1)
- Specific Heat Capacity: 1 240 J/(kg·K)
Electrical Properties
- Relative Permittivity (1 MHz): 3.9 / 4.7 (IEC 62631-2-1)
- Dissipation Factor (1 MHz): 180 / 910 × 10⁻⁴ (IEC 62631-2-1)
- Volume Resistivity: 2 × 10¹² / 2 × 10⁸ Ω·m (IEC 62631-3-1)
- Surface Resistivity: — / 6 × 10¹² Ω (IEC 62631-3-2)
- Comparative Tracking Index (CTI, Test Liquid A): — / 350 (IEC 60112)
Flame Characteristics
- Automotive Materials Burning Behaviour (thickness ≥ 1 mm): Passed (+) (ISO 3795 / FMVSS 302)
Injection Moulding Processing
- Melt Volume Rate, MVR (275 °C / 5 kg): 10 cm³/10 min (ISO 1133)
- Melt Temperature Range: 280 – 310 °C
- Recommended Melt Temperature: 290 °C
- Mould Temperature Range: 80 – 90 °C
- Recommended Mould Temperature: 80 °C
- Pre-Drying Temperature: 80 °C
- Pre-Drying Time: 4 h
Use & Applications
- For automotive cooling circuits