New grade of hot-rolled, high-strength steel launched
Traditionally, weld seams can represent weak links in the highest grades of structural steels such as S1100 and S900. But with a new grade of hot-rolled, high-strength steel, such weld weaknesses may be eliminated due to the strength, elongation and impact-toughness properties of the welded area meeting the minimum guarantees of the base material.
SSAB has launched its Strenx 1100 Plus strip steel, which possesses unique weld properties and promises superior welding and bending performance in booms, frames, cranes and other lifting equipment.
The new steel aims to advance weld seam strength and is suitable for the lifting sector, giving customers and end-users lighter yet stronger equipment. It has the potential to reach farther, increase payload and improve fuel economy.
The optimal combination of strength and toughness of the welded and heat-affected area offers benefits to the design-engineering process. The design can be based on the same minimum static strength for the entire application, depending on the design rules.
It is ideal for lifting equipment and advanced structures that require matching strength in the welds. The strip steel is designed for applications that require welded joints. The heat input is not limited, meaning that it can be welded at room temperature.
SSAB states that its new product is an exceptionally clean steel and that the precisely-controlled production process means consistently high quality and predictable results. It guaranteed flatness, thickness, bendability and tight tolerances.
The recommended heat input interval is very wide, with cooling times, ∆t 8/5, from 5 to 20 seconds. The product does not require any preheating when welded, based on CTS tests according to ISO 17642-2:2005.
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