Janka (hardness): 11.9
The two most common Red Ironbarks are Mugga Ironbark and Narrow-leaved Red Ironbark. The heartwood colour is a deep red. Sapwood is very distinctive, being a pale yellow in colour. The grain is usually interlocked, with a moderately coarse texture.. The heartwood is highly durable (Class 1), allowing for wide range of external applications.