What kind of steel material of 29m 33m hydraulic self jack-up concrete placing boom?

What kind of steel material of 29m 33m hydraulic self jack-up concrete placing boom?

What kind of steel material of 29m 33m hydraulic self jack-up concrete placing boom?
To the saintyol dawin machinery 29m 33m tower column self jack-up concrete placing boom, The tower 22.7 meter column steel is Q345 in 355Mpa , the placing boom material is HG70 in 600Mpa.