S-glass fibre reinforcements from CA Composites — high-strength S2-glass woven fabrics with superior tensile strength and stiffness compared to standard E-glass. Suitable for aerospace, defence and sporting goods.
E-Glass vs S-Glass: Woven Laminate Properties
The table below compares typical mechanical properties of woven fabric laminates made from E-glass and S-glass reinforcements. Values are based on standard woven prepreg layups at approximately 50% fibre volume fraction (FVF). Unidirectional (UD) laminates will show significantly higher values in the fibre direction due to fibre alignment.
| Property | E-Glass Laminate | S-Glass Laminate | Test Standard |
|---|---|---|---|
| Tensile Strength | 430 MPa | 650 MPa | ASTM D 3039 |
| Tensile Modulus | 24 GPa | 30 GPa | ASTM D 3039 |
| Flexural Strength | 445 MPa | 750 MPa | ASTM D 7264 |
| Flexural Modulus | 25 GPa | 30 GPa | ASTM D 7264 |
| Compressive Strength | 323 MPa | — | ASTM D 6641 |
| Interlaminar Shear | 58 MPa | 70 MPa | ASTM D 2344 |
| Resin Content | 33–37% | 35–40% | — |
| Weave Options | Plain / Twill | Plain / Twill | — |
Note: S-glass offers approximately 50% higher tensile and flexural strength than E-glass in woven laminate form. For unidirectional (UD) laminates at 60% FVF, typical S-glass tensile strength reaches 1,500–1,700 MPa and tensile modulus 55–57 GPa (per ISO 527-5), significantly higher due to full fibre alignment in one direction.
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