I don't have the exact cross-sectional size of the chain link or the amount of stress that was present in the area that fractured, I only know that it was able to carry 22,000 lbs of load. If a part in tension has a 1 sq in cross section and 22,000 lbs load with no bending we can calculate an ultimate tensile strength of 22kpsi, but in this case the link must resist some bending and contact forces in addition to having an unknown cross sectional area. For a pure tensile specimen, you can refer to the published material properties mlc-cad.com/markforged/markforged-materials/. Carbon fiber has a tensile strength of over 100ksi but it is directional, so it isn't a simple apples to oranges comparison.