BASF ULTRAMID A4H
Plastic Granules
ULTRAMID A4H
Ultramid® A4H is a heat-aging resistant PA66 resin for injection molding. It offers medium viscosity, 3000 MPa dry tensile modulus, CTI 600, and 200°C short-cycle service temperature. Ideal for bearing cages, gear wheels, coil formers, and cable connectors.
Typical property data
Physical Properties
- Density: 1130 kg/m³ (ISO 1183)
- Viscosity Number: 190 cm³/g (ISO 307 / ISO 1157 / ISO 1628)
- Test condition: 0.5% in 96% H₂SO₄
- Water Absorption, Saturation in Water at 23°C: 8–9% (similar to ISO 62)
- Moisture Absorption, Equilibrium at 23°C / 50% RH: 2.5–3.1% (similar to ISO 62)
- Bulk Density: Approx. 0.7 g/cm³
Mechanical Properties
- Tensile Modulus: 3000 / 1200 MPa (ISO 527-1 / ISO 527-2)
- Yield Stress at 50 mm/min: 80 / 50 MPa (ISO 527-1 / ISO 527-2)
- Yield Strain at 50 mm/min: 4.2 / 23% (ISO 527-1 / ISO 527-2)
- Nominal Strain at Break at 50 mm/min: 25 / >50% (ISO 527-1 / ISO 527-2)
- Tensile Creep Modulus, 1000 h, Strain ≤0.5%, 23°C: * / 700 MPa (ISO 899-1)
- Flexural Modulus: 2900 / 1200 MPa (ISO 178)
- Flexural Strength: 80 / 45 MPa (ISO 178)
- Charpy Unnotched Impact Strength at 23°C: N / N kJ/m² (ISO 179/1eU)
- Charpy Unnotched Impact Strength at -30°C: 210 / 250 kJ/m² (ISO 179/1eU)
- Charpy Notched Impact Strength at 23°C: 6 / 19.7 kJ/m² (ISO 179/1eA)
- Charpy Notched Impact Strength at -30°C: 4.9 / 4.5 kJ/m² (ISO 179/1eA)
Thermal Properties
- Melting Temperature, DSC: 260°C (ISO 11357-1 / ISO 11357-3)
- Deflection Temperature Under Load, 1.8 MPa, HDT A: 75°C (ISO 75-1 / ISO 75-2)
- Deflection Temperature Under Load, 0.45 MPa, HDT B: 190°C (ISO 75-1 / ISO 75-2)
- Maximum Service Temperature, Short Cycle Operation: 200°C
- Temperature Index at 50% Loss of Tensile Strength After 5,000 h: 138°C (IEC 60216)
- Temperature Index at 50% Loss of Tensile Strength After 20,000 h: 118°C (IEC 60216)
- Coefficient of Linear Thermal Expansion, Longitudinal, 23–55°C: 98 × 10⁻⁶/K (ISO 11359-1 / ISO 11359-2)
- Thermal Conductivity: 0.33 W/(m·K) (DIN 52612-1)
- Specific Heat Capacity: 1700 J/(kg·K)
Electrical Properties
- Relative Permittivity at 1 MHz: 3.2 / 5 (IEC 62631-2-1)
- Dissipation Factor at 1 MHz: 250 / 2000 × 10⁻⁴ (IEC 62631-2-1)
- Volume Resistivity: 1E13 / 1E10 Ω·m (IEC 62631-3-1)
- Surface Resistivity: – / 1E13 Ω (IEC 62631-3-2)
- Comparative Tracking Index, CTI, Test Liquid A: 600 (IEC 60112)
Flame Characteristics
- Automotive Materials, Thickness ≥1 mm: Passed (ISO 3795 / FMVSS 302)
Use & Applications
- Bearing cages
- gear wheels
- coil formers
- cable connectors