Black Locust
Robinia pseudoacacia · Hardwood
AI-generated identification · may be incorrect- Type
- Hardwood
- Origin
- Native to the eastern United States, now widely naturalized across North America, Europe, and Asia.
- Hardness
- 1,700 lbf (Very Hard)
- Durability
- Very Durable. Excellent resistance to rot, decay, and insect attacks.
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Grain Pattern
Straight to irregular grain with a coarse, uneven texture
Color & Appearance
Heartwood is a golden-yellow to greenish-brown, turning a darker brown upon exposure to light; sapwood is a pale yellowish-white and is distinctly demarcated.
Hardness (Janka)
1,700 lbf (Very Hard)
Durability & Decay Resistance
Very Durable. Excellent resistance to rot, decay, and insect attacks.
Value & Age
4.00 to 7.00 USD per board foot for lumber.
AI estimate for general guidance only — not a professional appraisal. Actual value depends on grade, dimensions, condition, and local market demand.
- Wood Age Estimate
- Living tree, estimated 40 to 60 years based on trunk diameter and bark development.
Common Uses
Fence posts, decking, boat building, exterior furniture, landscaping ties, and turned items.
Geographic Origin
Native to the eastern United States, now widely naturalized across North America, Europe, and Asia.
Workability
Difficult to work with hand and machine tools due to its extreme hardness and density. High blunting effect on cutters. Glues and finishes well.
Finish Recommendations
Takes oils and exterior finishes well, though its natural weather resistance allows it to be left unfinished to weather to a silvery-gray.
Notable Features
Contains natural tannins and oils that provide exceptional weather resistance without chemical treatments. Wood dust can be an irritant.
