Red Alder (Alnus rubra)
Description: Red alder, a relative of birch, is almost white when freshly cut but quickly changes on exposure to air, becoming light brown with a yellow or reddish tinge. Heartwood is formed only in trees of advanced age and there is no visible boundary between sap and heartwood. The wood is fairly straight-grained with a uniform texture.
Main Uses: Furniture, kitchen cabinets, doors, shutters, mouldings, panel stock, turnings, carvings and kitchen utensils.
Physical Properties: Red alder is a relatively soft hardwood of medium density that has low bending strength, shock resistance and stiffness.
Availability: Available in dimension stock and lumber.
Working Properties: Red alder machines well and is excellent for turning. It nails, screws and glues well, and can be sanded, painted or stained to a good finish. When stained, it blends with walnut, mahogany or cherry. It dries easily with little degrade and has good dimensional stability after drying.
Machining | Nailing | Screwing | Gluing | Finishing |
Excellent | Good | Good | Good | Excellent |
Strength and Mechanical Properties: (inch-pound)
Moisture Content | Green-12% |
Specific Gravity | 0.37-0.41 |
Static Bending: Modulus of Rupture (lbf/in^2) | 6,500-9,800 |
Static Bending: Modulus of Elasticity (10^6 lbf/in^2) | 1.17-1.38 |
Static Bending: Work to Maximum Load (in-lbf/in^3) | 8.0-8.4 |
Impact Bending to Grain (in) | 22-20 |
Compression Parallel to Grain (lbf/in^2) | 2,960-5,820 |
Compression Perpendicular to Grain (lbf/in^2) | 250-440 |
Shear Parallel to Grain (lbf/in^2) | 770-1,080 |
Tension Perpendicular to Grain (lbf/in^2) | 390-420 |
Side Hardness (lbf) | 440-590 |
Source: American Hardwood Information Center, Species Guide