Fiber comparison
Flax fiber (natural) vs S-2 glass fiber
Every value below is a typical room-temperature figure with its source, test method and conditions — the same dataset that drives the calculators.
| Property | Flax fiber (natural) | S-2 glass fiber | Difference |
|---|---|---|---|
| Density | 1.5 g/cm³ | 2.46 g/cm³ | S-2 glass fiber — 64% higher |
| Young's modulus E | 58 GPa | 86.9 GPa | S-2 glass fiber — 50% higher |
| Tensile strength | 800 MPa | 4890 MPa | S-2 glass fiber — 6.1× higher |
Where these numbers come from
- Pickering, Efendy & Le, Composites Part A 83 (2016) — natural fibre review
- AGY S-2 Glass product datasheet
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.