Fiber comparison
Basalt fiber vs Flax fiber (natural)
Every value below is a typical room-temperature figure with its source, test method and conditions — the same dataset that drives the calculators.
| Property | Basalt fiber | Flax fiber (natural) | Difference |
|---|---|---|---|
| Density | 2.67 g/cm³ | 1.5 g/cm³ | Basalt fiber — 78% higher |
| Young's modulus E | 89 GPa | 58 GPa | Basalt fiber — 53% higher |
| Tensile strength | 2900 MPa | 800 MPa | Basalt fiber — 3.6× higher |
Where these numbers come from
- Fiore et al., Composites Part B 74 (2015) — basalt fibre review
- Pickering, Efendy & Le, Composites Part A 83 (2016) — natural fibre review
Typical room-temperature values for learning and preliminary design; grades vary widely and a supplier datasheet always overrides a textbook figure. Confirm against the datasheet before design work.