Feb 9 (Reuters) - Alphabet is looking to raise about $15 billion from a U.S. high-grade dollar bond sale, Bloomberg News reported on Monday, citing people with knowledge of the matter. Technology firms are turning to debt sales worth tens of billions of dollars to fund infrastructure expansions as demand for artificial intelligence workloads surges. Cloud-computing companies known as hyperscalers are expected to pour more than $630 billion combined, largely into AI this year, even though returns have lagged the pace of growth in the outlays. The bond sale has attracted more than $100 billion of orders, Bloomberg News reported later on Monday. The Google parent is selling bonds in as many as seven parts, according to its regulatory filing, which did not disclose the size of the sale. Initial price discussions for the longest portion of the deal - a bond maturing in 2066 - are for a premium of about 1.2 percentage points above Treasuries, the Bloomberg report said. Alphabet did not immediately respond to a Reuters request for comment on the reports. Reuters could not independently verify the reports. Pent-up M&A and companies' efforts to refinance existing debt are expected to lift overall corporate bond issuance this year, but the biggest driver will be borrowing to fund AI-related investments, Barclays said. Last week, Alphabet said its capital expenditures would reach as much as $185 billion this year. The five major AI hyperscalers - Amazon, Alphabet's Google, Meta, Microsoft and Oracle - issued $121 billion in U.S. corporate bonds last year, compared with an average $28 billion per year between 2020 and 2024, according to a January 9 report by BofA Securities. Oracle sought $18 billion in new debt in September, while Meta raised $30 billion in October, the largest-ever individual non-M&A high-grade bond sale. (Reporting by Jaspreet Singh in Bengaluru; Editing by Arun Koyyur and Maju Samuel) (The article has been published through a syndicated feed. Except for the headline, the content has been published verbatim. Liability lies with original publisher.)