Samsung notched its best second-quarter profit since 2018, on strong sales of chips amid a cooling smartphone market.

The Korea-based company said Wednesday that its operating profit for the three-month period ended June 30 came in at 14.1 trillion won ($10.8 billion), an increase of 12% compared with the same time period last year. The company also posted record second-quarter revenue of 77.2 trillion won ($59.1 billion), an increase of more than 21%.

Earnings in the company's mobile business declined compared with the first quarter due to the rising costs of components, but revenue increased 31% year over year on strong sales of flagship models such as the Galaxy S22 series and the Galaxy Tab S8 series.

Samsung said it expects the smartphone market to hold steady or show single-digit growth in the second half of the year. The company also said it plans to expand flagship sales with a line of new foldables, which the company is expected to unveil at its next Unpacked event, next month.

Smartphones are feeling the heat of economic downturn fears, with demand shrinking in the second quarter. Smartphone vendors shipped 270 million handsets in the second quarter, a 9% decline over the first quarter.

"Economic headwinds, sluggish demand, and inventory pileup have resulted in vendors rapidly reassessing their portfolio strategies for the rest of 2022," Canalys Research Analyst Runar Bjørhovde said in a report earlier this month. "The oversupplied mid-range is an exposed segment for vendors to focus on adjusting new launches, as budget-constrained consumers shift their device purchases toward the lower end."

Samsung is best known as a phone and TV maker, but it also sells more memory chips than any other company on the planet. In the second quarter, Samsung benefited from continued strong demand for server memory while demand for consumer products weakened, resulting in memory shipments coming in below guidance. Still, sales in Samsung memory units rose 18% year over year.

However, Samsung cautioned that demand for consumer products and PCs will remain weak.

"For PC, there is a possibility that the slump in demand may expand to enterprise segments," Samsung said in a statement. "Nevertheless, there are also chances of consumer demand getting stimulated during the year-end promotional season."

Samsung's strong quarter came while chipmakers face a glut, as demand for smartphones and PCs declines. Prices for DRAM chips, commonly used in PCs, was expected to decline about 5% in the second quarter, according to market researcher TrendForce, with another 10% decline forecast for the third quarter.

Prices for NAND Flash memory, widely used in portable consumer devices like digital cameras, cell phones and USB flash drives, was expected to decline about 5% this quarter, with as much as a 10% decline in the third quarter, TrendForce predicted.