SSAB’s Strenx® 1100 high-strength steel was chosen for use in Zoomlion’s super all-terrain crane, which will be used in wind power installation projects
Zoomlion, a long-term SSAB customer and one of China’s biggest crane manufacturers, recently delivered the world’s largest tonnage all terrain crane QAY2000, known as the “son of wind”, to its end user in Ningxia, where it will be used in wind power construction and equipment installation.
Produced the first truck crane of China in 1972, Zoomlion enjoys a leading position in the crane market in China. Its lifting equipment portfolio includes mobile cranes, rough-terrain cranes, all-terrain cranes, crawler cranes and lorry cranes. Zoomlion had spent several years on technology development and tests before launching the QAY2000 model and delivery to the end user.
The QAY2000 has a maximum lifting capacity of 2,000 tons. The key parts - the whole set of the booms - were made out of SSAB’s Strenx® 1100 high-strength steel. Strenx®’s superb consistency, flatness, bending properties and workshop-friendliness enabled the QAY2000 to achieve the aim of greater performance and reduced weight. Strenx® 1100 has a minimum yield strength of 1,100MPa and the use of such high-strength material in a structure like QAY2000 requires very high impact toughness to ensure safety. The all-round properties of Strenx® 1100 provide the best performance in this niche market. Ms. Wang Lianfang, senior engineer at Zoomlion, said “For big capacity all-terrain cranes, no material with a yield strength below 1100 MPa will meet our weight reduction requirement. We only buy this grade of materials from SSAB, who not only provide us with reliable steels of consistent quality, but also abundant technical support to enable us to take full advantage of the steels.”