Blackbutt :: Eucalyptus pilularis
Blackbutt is a commonly grown hardwood that has attractive colouring from cream to pale brown, sometimes with a slight tinge of pink. Its grain is usually straight and texture is medium and even. Blackbutt is a versatile timber and is used for structural, exterior and interior applications. It is used for cladding, internal and external flooring, decking, joinery, landscaping and furniture. Blackbutt is also used in the manufacture of plywood. Blackbutt can be stained, painted or polished but there can be issues with painting because of its tendency to surface check.
Physical Properties
- Dry Density (kg/m3) = 900
- Janka Dry Hardness (kn) = 9.1
The Janka rating is the hardness level given to each species. The higher the number, the greater the hardness.
Properties
| Species Name | Blackbutt | |
| Botanical Name | Eucalyptus pilularis | |
| Colour Range | Blonde | |
| Janka (Hardness) Rating – Dry | 9.1 | |
| Natural Durability Class | In-ground contact | 2 |
| Outside above ground contact | 1 | |
| Density (kg/m3) | Unseasoned (Green) | 1100 |
| Seasoned (Dry) | 880 | |
| Strength Group | Unseasoned (Green) | S2 |
| Seasoned (Dry) | SD2 | |
| Joint Group | Unseasoned (Green) | J2 |
| Seasoned (Dry) | JD2 | |
| Fire Indices | Spread-of-Flame Index | 9 |
| Smoke-Developed Index | 3 | |
| Critical Radiant Flux | >2.2 and <4.5 | |
| Smoke Development Rate | <750 | |
| Group Number | 3 | |
| Naturally bushfire-resisting Timber | Yes | |
| Tangential Shrinkage % | 7.3 | |
| Toughness (Nm) | Naturally Unseasoned (Green) | 21 |
| Seasoned (Dried) | 22 | |
| Naturally Termite Resistant to AS3660R = Resistant
NR = Non resistant |
R | |
| Naturally Lyctus SusceptibleS = Susceptible
NS = Non susceptible |
NS |