Three-month copper on the London Metal Exchange was trading around $4,855 a metric ton on Tuesday in Asia, after hitting $4,960 a ton in the previous session, the highest since May 3 .
The red metal is seen as an economic bellwether because it's used in a wide range of products and industrial applications.
Copper has risen recently due to hopes of further easing by central banks to help avert an economic downturn but some observers said the uptrend was unlikely to be sustainable due to weak fundamentals.
In a note last week, Goldman Sachs analysts said strong credit growth and the lack of dollar upside in the first half of the year had fueled demand for metals.
Copper imports into China rose 22 percent between January and May from the same period from a month ago, Reuters reported last month.
"Most market participants expect strong infrastructure activity to continue through the course of the year given that the Chinese government has been increasingly reliant on this to support economic growth, but they also expect a gradual slowdown of property development owing to the high property inventory level in the lower-tier cities," said Goldman.
"Copper bearishness remains intact. Most market participants we met expect China's copper demand to be moderately higher this year as a result of an uptick in property construction and demand from solar PV cable (photovoltaic cable) producers, as many domestic PV projects rushed to be commissioned before the subsidy policy adjustment on June 30, 2016," they added.