Basalt Fiber
Continuous basalt fiber roving drawn and wound into spools: tensile strength 3,500–3,800 MPa, density 2.65 g/cm³, long-term service temperature −260 to 700 °C, Class A non-combustible, supplied from stock to specification.
Typical Fiber Properties
Typical industry values (2025 figures); batch results are subject to test reports.
| Property | Typical value | Notes |
|---|---|---|
| Tensile strength | 3,500–3,800 MPa | Comparable to T300-class carbon fiber |
| Density | 2.65 g/cm³ | About 1/3 of steel, enabling 30–50% weight reduction |
| Elastic modulus | approx. 90 GPa | Outstanding specific modulus |
| Specific strength | About 20–35× that of steel | On the order of 1,200 MPa/(g/cm³) |
| Long-term service temperature | −260 ~ 700 ℃ | Higher short-term temperature tolerance; Class A non-combustible (LOI ≥68%) |
| 24h water absorption | < 0.5% | Salt spray >3,000 h; resists acids, alkalis and UV aging |
| Dielectric loss tangent | < 0.01 | About 50% lower than glass fiber |
| Wave transmittance | > 98% | Compatible with 5G / millimeter-wave signals |
| Typical price range | RMB 30–80/kg | 50–90% lower than high-performance carbon fiber (RMB 150–300/kg) |
Why Engineers Consider It
Mechanical Light
30–50% lighter than metal, with about 34% better impact energy absorption than conventional glass-fiber composites.
Thermal Fireproof
Long-term −260 to 700 °C and higher for short periods, limiting oxygen index ≥68% (Class A non-combustible); no dripping and no flame spread in a fire.
Environmental Corrosion-resistant
A natural inorganic material with 24h water absorption <0.5% and salt-spray resistance >3,000 h, reliable long-term in humid, saline and chemical environments.
Electromagnetic RF-transparent
Dielectric loss tangent <0.01 and wave transmittance >98%, transparent to signals: suitable for radomes, antenna covers and 5G/millimeter-wave enclosures.
From Quote to Supply in Four Steps
Tell us the application and specs, confirm the quote
Leave a message or call with the linear density, quantity and intended use; an engineer replies with specifications and a quote within 1 business day.
Samples and prototyping, verify before you buy
Roving spool samples can be shipped, with test reports on request, so you can confirm against the real material.
Bulk delivery to the confirmed specification
Supplied to the mutually confirmed specification and lead time, with test data available per batch and stable long-term supply.
Selection and application advice
Questions on fiber selection, storage and downstream use are welcome anytime; our materials lead responds directly.
Typical Application Directions (Indicative)
The application directions below are technical indications; final selection is subject to prototype verification.
Lightweight structural parts
Robot-arm links, motion platforms and other metal-replacing structural parts, 30%+ lighter.
RF-transparent housings
Radomes, antenna covers and communication equipment enclosures, wave transmittance >98%.
Heat resistance & protection
High-temperature guards, thermal insulation structures and protective panels, long-term 700 °C, Class A non-combustible.
Corrosion-resistant structures & building materials
Sheathing, profiles and anti-corrosion works for marine and chemical environments, salt spray >3,000 h.
Need a Roving Quote or Samples?
Tell us the quantity and linear density; an engineer replies within 1 business day.