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FRP Test Item | Unit (or Condition) | Technical Parameter |
Ovality | % | <5 |
Appearance | Smooth surface, no bur, no crack | |
Diameter Tolerance | % | ±2 |
Density | g/cm3 | 2.05~2.15 |
Tensile Strength | MPa | ≥1100 |
Elastic Tensile Modulus | GPa | ≥50 |
Bending Strength | MPa | ≥1100 |
Flexural Modulus | GPa | ≥50 |
Elongation at Break | % | 2.5% < x < 4% |
Coefficient of Linear Expansion | 1/°C (-30°C ~ +80°C) | ≤8×10-6 |
Heat Shrinkage | % | 0 |
Water Absorption | % | ≤0.1 |
Minimum Bending Radius | mm (20°C ± 5°C) | 25D |
High Temperature Bending Performance | (50D, 100°C, 120h) | No bur, no crack, no break, smooth surface |
Low Temperature Bending Performance | (50D, -40°C, 120h) | No bur, no crack, no break, smooth surface |
Twisting Test | ±360°/m | Non-disintegration |






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