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SSAB steel developments

A new development from SSAB Swedish Steel will be of interest to crane OEMs and equipment users.
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Strenx 1100 MC ultra high-strength strip steel is designed to “meets the needs of advanced lifting equipment manufacturers... [and gives them] new opportunities to design telescopic or articulated boom cranes that are lighter, deliver higher performance, and are more cost-efficient for the crane operators,” said SSAB.

SSAB was the first manufacturer to introduce 1100 MPa strip steel, allowing for new innovative design solutions to be realised. The new generation Strenx 1100 MC has improved properties and is now available in thicknesses of between 3mm and 8 mm.

“Carefully controlled properties, improved elongation, impact toughness and workshop behaviour of Strenx 1100 MC ensure a safe move from the common 900 MPa level to 1100 MPa,” said SSAB.

“Manufacturers can be confident that the finished crane will perform better and be more cost-efficient for the crane operators than previous versions.

“Strenx 1100 MC is delivered with an exceptionally high surface quality. A smooth surface improves the steel’s resistance against fatigue. It also saves hours during the painting process, improves the visual appearance and makes it easier to keep the equipment clean.”

As with all SSAB grades, Strenx 1100 MC is manufactured from exceptionally clean steel. The production is inspected at several points to ensure that the steel complies with the rigorous quality requirements for mechanical properties and dimensions.

When designing with thinner steel, the thickness tolerances become increasingly important. Strenx 1100 MC is guaranteed to have considerably narrower thickness tolerances compared to the EN 10 051 standard.

Thickness accuracy is vital for making reliable calculations on strength and deflection of the boom, particularly the final narrow boom segments where the thinnest steel is used.

Exact thickness is also vital for calculating the total weight of the crane, and for determining inertia forces when moving and rotating the crane. Strenx 1100 MC has a flatness guarantee of 3 mm/m for cut-to-length sheets.

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