Apr. 16 (Reuters) - ASML (ASML. O) posted lower-than-expected orders due to weakness in the chip industry in the quarter before U.S. tariffs threatened to upend the industry. The Dutch company's orders reached 3.94 billion euros ($4.47 billion) in the three months to March, with analysts averaging 4.82 billion euros, the company said in a statement released on Wednesday. It expects total net sales to be between 30 billion and 35 billion euros in 2025, ASML said. ASML is the sole producer of cutting-edge lithography machines, which are used by semiconductor companies to make advanced chips for a variety of products, including Apple Inc's smartphones and Nvidia Inc's artificial intelligence accelerators.