Australian Hardwood Timbers are among some of the world’s hardest by the internationally recognised and uiversally adopted Janka Hardness Ratings. Just as some people have the genetics that allow them to run fast, jump high, run long distances or bench press heavy weights, species of timber also have genetic dispositions that allow them to withstand intense heat, humidity, high traffic, high heels, water, etc.

Under the Janka Hardness Rating, simply, the higher the number the harder the wood. These ratings were determined using the Janka Hardness Test which measures the side hardness measure of the force required to embed a .444 inch steel ball to half its diameter into the wood. This is one of the best measures of the ability of wood species to withstand denting and wear. It is also a good indicator of how hard a species is to saw or nail.

A full list of the Janka Hardness Rating can be found by clicking here.

Grey Ironbark is one of the world’s most durable hardwoods and its uses and applications know almost no bounds. Railway sleepers, bridge piers & pylons, wharves, decking, flooring, structural posts and beams, landscaping, retaining walls, Ironbark has an enormous amount of uses because of it’s strength and durability.

Using the Australian (metric) scale, the ratings can be categorised as such:

JANKA RATINGHARDNESS
<5.5Soft
5.5 – 7Moderate
7 – 10Hard
>10Very Hard

In summary, many of the species sold by us are among the hardest and most durable in the world.

SPECIESMETRIC JANKA RATINGIMPERIAL JANKA RATING
Grey Ironbark & Grey Gum14.03664
Red Ironbark13.02922
Bloodwood12.92900
Red Mahogany12.02697
Spotted Gum 10.02473
Brushbox9.1 2135
Blackbutt8.92001
Tallowood8.61933
Jarrah8.5 1910
Blue Gum8.11821