Scientific Name
Engelhardtia nudiflora
Trade Name
Dungun paya
Family Name
Juglandaceae
Common Names
Dungun paya, Engel, Pa’ar
Regions of Distribution
Oceania and S.E. Asia
Countries of Distribution [VIEW MAP]
Malaysia, Papua New Guinea
Heartwood Color
| Red | ||||||||||||
| Brown | ||||||||||||
| Purple | ||||||||||||
| Pink |
Sapwood Color
| White | ||||||||||||
| Yellow | ||||||||||||
| Brown | ||||||||||||
| Green/Grey |
Grain
| Straight | ||||||||||||
| Figure | ||||||||||||
| Even | ||||||||||||
| Other (figure) | ||||||||||||
| Growth rings (figure) | ||||||||||||
| Rippled (figure) | ||||||||||||
| Weak (figure) |
Texture
| Coarse | ||||||||||||
| Medium | ||||||||||||
| Fine |
Luster
| Low | ||||||||||||
| Lustrous |
Natural Durability
| Susceptible to insect attack | ||||||||||||
| Very durable | ||||||||||||
| Resistant to termites | ||||||||||||
| Durable | ||||||||||||
| Non-resistant to marine borers | ||||||||||||
| Non-resistant to termites | ||||||||||||
| Non-resistant to powder post beetles | ||||||||||||
| Resistant to powder post beetles | ||||||||||||
| Susceptible to attack from powder post (Lyctid & Bostrychid) beetles | ||||||||||||
| Non durable |
Odor
| Has an odor |
Drying Defects
| Resin Exudation | ||||||||||||
| Splitting | ||||||||||||
| Distortion | ||||||||||||
| Checking | ||||||||||||
| Internal Honeycombing Possible |
Ease of Drying
| Moderately Difficult to Difficult | ||||||||||||
| Slowly | ||||||||||||
| Gum Exudation | ||||||||||||
| Thick Stock Requires Care |
Kiln Drying Rate
| Even | ||||||||||||
| Straight | ||||||||||||
| Tree height is 20-30 m | ||||||||||||
| Bole length is 10-20 m | ||||||||||||
| Tree height is 30-40 m | ||||||||||||
| Sapwood width is 0-5 cm | ||||||||||||
| Sapwood width is 5-10 cm | ||||||||||||
| Trunk diameter is 100-150 cm | ||||||||||||
| Bole length is 20-30 m | ||||||||||||
| Bark width is 10-15 mm | ||||||||||||
| Tree height is 10-20 m |
Sapwood width (cm) = 5 – <10
Blunting Effect
| Moderate | ||||||||||||
| Blunting effect on machining is slight |
Cutting Resistance
| Fairly Difficult to Very Difficult to saw | ||||||||||||
| Easy to saw | ||||||||||||
| Gum-Up |
Gluing
| Fairly Easy to Very Easy | ||||||||||||
| Fair to Good Results |
Movement in Service
| Excellent Stability – Small Movement | ||||||||||||
| Fair to Good Stability – Medium Movement |
Nailing
| Fairly Difficult to Very Difficult | ||||||||||||
| Pre-Boring Recommended | ||||||||||||
| Fair to Good Results | ||||||||||||
| Very Good to Excellent Results |
Planing
| Fairly Easy to Very Easy | ||||||||||||
| Fair to Good Results | ||||||||||||
| Fairly Difficult to Very Difficult | ||||||||||||
| Very Good to Excellent Results |
Resistance to Impregnation
| Resistant heartwood | ||||||||||||
| Resistant sapwood |
Response to Hand Tools
| Easy to Work | ||||||||||||
| Fairly Difficult to Difficult to Work |
Turning
| Fairly Easy to Very Easy | ||||||||||||
| Very Good to Excellent Results | ||||||||||||
| Fair to Good Results |
Steam Bending
| Fair to Good Results |
Painting
| Fair to Good Results |
Polishing
| Fair to Good Results | ||||||||||||
| Poor to Very Poor Results | ||||||||||||
| Very Good to Excellent Results | ||||||||||||
| Fairly Easy to Very Easy |
Staining
| Fair to Good Results | ||||||||||||
| Very Good to Excellent Results |
Strength Properties
| Shrinkage, Tangential = fairly large | ||||||||||||
| Shrinkage, Radial = moderate |
Numerical Data
| Item | Green | Dry | English |
| Radial Shrinkage | 4 | % | |
| Tangential Shrinkage | 9 | % | |
| Item | Green | Dry | Metric |
| Radial Shrinkage | 4 | % |
References
Oxford School of Forestry