INDEPENDENCE, Ohio--(BUSINESS WIRE)--GrafTech International Ltd. (NYSE:GTI) today announced financial results for the second quarter ended June 30, 2015. 2015 Second Quarter Review Net sales were $165 million, a decrease of 42 percent, compared to $284 million in the same period of the prior year. Lower shipment volumes and pricing in both business segments primarily drove the reduction in net sales. Reported net loss was $(23) million, or $(0.17) per diluted share, compared to reported net los