Boron fibre in an epoxy matrix. Boron/epoxy has exceptional specific stiffness and compressive strength — boron filament is markedly stiffer than carbon and does not buckle under compression the way graphite does. Historically used for empennage skins and stiffeners on military aircraft, its enduring role is bonded composite repair: boron patches restore stiffness to cracked metallic structure without the galvanic problems carbon introduces against aluminium. The handbook characterises it from -67 °F to 375 °F, consistent with elevated-temperature service. MatWorld carries 44 tensile and compressive curves for this system, digitised from MIL-HDBK-17-2F Volume 2 (US Government work, public domain).
Compliance & Regulations
24 interactive curves for this material
Stress-strain, S-N fatigue and environmental knockdown curves are free with an account.
Create free account| Property | Value | Unit | Conditions | Source | |
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Stress–Strain Curve(σ–ε) | — | Pa | 24 entriesClick to expand | ||