Hard Maple (Acer saccharum, Acer nigrum)
Description: The sapwood is creamy white with a slight reddish brown tinge and the heartwood varies from light to dark reddish brown. The amount of darker brown heartwood can vary significantly according to growing region. Both sapwood and heartwood can contain pith flecks. The wood has a close, fine uniform texture and is generally straight-grained, but it can also occur as "curly," "fiddleback," and "birds-eye" figure.
Main Uses: Flooring, furniture, paneling, ballroom and gymnasium floors, kitchen cabinets, worktops, table tops, butchers blocks, toys, kitchenware and millwork: stairs, handrails, mouldings and doors.
Physical Properties: The wood is hard and heavy with good strength properties, in particular its high resistance to abrasion and wear. It also has good steam-bending properties.
Availability: Widely available. The higher quality grades of lumber are available selected for white color (sapwood) although this can limit availability. Figured maple (birds-eye, curly, fiddleback) is generally only available in commercial volumes as veneer.
Working Properties: Hard maple dries slowly with high shrinkage, so it can be susceptible to movement in performance. Pre-boning is recommended when nailing and screwing. With care it machines well, turns well, glues satisfactorily and can be stained to an outstanding finish. Polishes well and is suitable for enamel finishes and brown tones.
Machining | Nailing | Screwing | Gluing | Finishing |
Good | Poor | Poor | Good | Excellent |
Strength and Mechanical Properties: (inch-pound)
Moisture Content | Green-12% |
Specific Gravity | 0.52-0.63 |
Static Bending: Modulus of Rupture (lbf/in^2) | 7,900-15,800 |
Static Bending: Modulus of Elasticity (10^6 lbf/in^2) | 1.33-1.83 |
Static Bending: Work to Maximum Load (in-lbf/in^3) | 12.5-16.5 |
Impact Bending to Grain (in) | 39-48 |
Compression Parallel to Grain (lbf/in^2) | 3,270-7,830 |
Compression Perpendicular to Grain (lbf/in^2) | 600-1,470 |
Shear Parallel to Grain (lbf/in^2) | 1,130-2,330 |
Tension Perpendicular to Grain (lbf/in^2) | -- - 720 |
Side Hardness (lbf) | 840-1,450 |
Source: American Hardwood Information Center, Species Guide