The precision materials business group of Walsin Lihwa focuses on the development and production of stainless steel seamless pipes and tubes, stainless steel drawn wires, steel cables, free cutting steel, spheroidized annealed alloy steel wires, and special alloy materials. The business group has operations in Changshu, Changzhou, and Jiangyin of Jiangsu Province and is one of the leader of precision materials providers in the Asia Pacific.

Changshu Walsin Specialty Steel Co. produces seamless pipes and tubes of stainless steel, nickel alloy, and titanium for power plant boilers, heat exchangers, and shipyards as well as nuclear and petrochemical industries. The output of the Changshu operation is one of highest in Mainland China and one of the top five in the world. The company is a qualified supplier to China Petrochemical Development Corp., China National Petroleum Corp., DuPont, Bayer, and Shell, and is also a certified supplier of nuclear power plant pipes and tubes in Mainland China.

Jiangyin Walsin Steel Cable Co. produces steel strands and galvanized steel wires, which have been used in the construction of Zhongshan Freeway, Jianguo Overpass, and Taiwan High Speed Rail. The Jiangyin operation is the largest manufacturer of pre-stressed materials in Mainland China, and its products have also been used to construct Humen Bridge in Guangdong, Jiangyin Yangtze River Bridge, the 2nd, 3rd, and 4th Nanjing Yangtze River Bridges, Runyang Yangtze River Bridge, Wuhan Yangluo Bridge, Tianxingzhou Highway and Railway Bridge, Shanghai Lupu Bridge, Hangzhou Bay Bridge, Taizhou Yangtze River Bridge, and Yangtze River Three Gorge Waterway Locks, as well as national-class infrastructure projects such Jinghu High Speed Rail, Huning High Speed Railway, and Huhang High Speed Rail.

Solder wires, spring wires, screw wires, and annealed wires, free cutting steel, and spheroidized annealed alloy steel wires are also produced in Jiangyin. These products are sold in America, Europe, and Southeast Asia in addition to Mainland China.