Iron birch, also known as black birch, is believed to be no stranger to people living in the Northeast. The texture of this tree is very hard, and its hardness is three times harder than oak! It is also twice as hard as ordinary steel. It is the hardest wood in the world, and it is often used as a substitute for metal.
Iron birch is a deciduous tree with a height of about 20 meters. The bark is dark red or black, and it is densely covered with white spots. The leaves are oval. The lifespan can reach 300-350 years. Although the lifespan is not long compared to the long-lived tree species, it can be regarded as a long-lived species for humans.
In the former Soviet Union, iron birch was used to make rolling balls, bearings, etc., and it was used on speedboats. It can be seen that its hardness is high! In addition, iron birch has a magical characteristic. They sink quickly when placed in water, and even after submerging them for a long time, the inside remains dry!