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The high-strength low-alloy steel S1100QL is used in the most demanding mechanical engineering applications. Typical structures made of this steel are hydraulically extendable pallet cranes in mobile lifting machinery, which require high strength-to-weight ratio. The high yield strength and toughness of S1100QL steel is achieved through proper chemical composition, hot rolling, and heat treatment. Those factors also have a strong effect on the weldability of this steel: the welded joint should have the properties required by EN ISO 15614-1. In this paper, the main properties of the S1100QL steel are shown. In addition, WPQR was performed on a 15 mm thick plate using the GMAW process. Analysed properties such as tensile test, impact toughness, hardness and microstructure are compared to the requirements of the international standards from the field of arc welding. |
