Reading a GRP Mechanical Datasheet
GRP structural profile datasheets list several mechanical properties that describe how the material behaves under different types of load. Here's what the key terms mean, using Union Fiber's published property ranges for GRP pultruded profiles as a reference.
| Property | What it measures | Union Fiber's range |
|---|---|---|
| Tensile strength | Resistance to being pulled apart | 280–400 MPa (ASTM D638) |
| Flexural strength | Resistance to bending forces | 280–400 MPa (ASTM D790) |
| Compressive strength | Resistance to being crushed | 210–280 MPa (ASTM D695) |
| Interlaminar shear strength | Resistance to layers sliding apart | 25–35 MPa (ASTM D2344) |
| Impact strength | Resistance to sudden impact loads | >150 daN·cm/cm² (UNI 6062-67) |
Why the test standard matters
Each property is measured using a specific standardized test method (e.g. ASTM D638 for tensile properties). These standards ensure that values are measured consistently and can be compared fairly between suppliers.
A note on precision
Published ranges reflect the variability inherent in composite materials, which can depend on fiber content and orientation. For project-critical structural design, always request a project-specific datasheet and confirm values directly with our engineering team via our contact page.