cartechboy writes: To date, carbon fiber has been expensive and presents different production challenges than traditional steel and aluminum. But now it seems as if the advanced material is about to become truly mainstream--BMW has announced it plans to triple carbon fiber reinforced plastic output at its Moses Lake facility in Washington state. Currently, the SGL Group plant, a joint venture partner of BMW Group, has the production capacity for about 3,000 tons of carbon fiber per annum. Two productions lines are currently going with the output dedicated to BMW's i3 and i8 plug-in vehicles. SGL is already working on a third and fourth production line which would double production to 6,000 tons per year, but a fifth and sixth are on the way, set to triple capacity to 9,000 tons every year. This extra output won't be reserved exclusively for BMW's i range. Several future BMW models will make use of the lightweight material. Now the only question is how long before carbon fiber vehicle construction becomes as common as aluminum?