December 13, 2025

Project: Sanlorenzo 58Steel

Five years after redefining the language of steel yachts, Sanlorenzo writes the next chapter in its story of evolution with the debut of the 58Steel, a refined and extended successor to the acclaimed 57Steel. Featuring an all-new diesel-electric hybrid propulsion system and a reimagined concept of onboard space, 58Steel embodies the brand’s philosophy of elegance, proportion and innovation. This is superyacht design, not just made to measure but made for tomorrow. When Sanlorenzo launched its first steel yacht in 2010, it redefined expectations of what steel construction could be, combining strength with elegance, restraint and proportion. Today, the brand’s impressive steel line has become the most defined in the segment under two thousand Gross Tonnage segment. Now, the new 58Steel, designed by Zuccon for the exteriors, represents a further evolution of this legacy; one metre longer, yet infinitely more versatile. With a completely new platform, an expanded beam of just under eleven metres and the introduction of diesel-electric hybrid technology, enabling zero-emissions cruising, it unlocks greater space, efficiency and silence. While drawing inspiration from the 57Steel design, 58Steel evolves it completely, offering interior volumes comparable to those of a 64-meter mega yacht. Every aspect has been conceived with flexibility and personalisation in mind, offering an onboard experience tailored entirely around the owner’s lifestyle. Expansive volumes and customisable layouts deliver the comfort of a larger yacht, with two full-beam VIP cabins on the Lower deck and a Supreme VIP on the Main deck. The Upper deck transforms into a secluded owner’s sanctuary: a panoramic suite with pool, office, dressing area, and a lounge convertible into a private cinema, the perfect configuration also for charter purposes. At the stern, the beach club opens on three sides to create a floating terrace, complete with bar, hammam, gym, and beauty salon, a space designed for connection to the sea through light, silence and simplicity.  At the heart of the 58Steel lies a revolutionary diesel-electric propulsion system, the first of its kind in Sanlorenzo’s steel line. This new configuration marks a decisive step towards sustainability, reducing emissions by around 10% compared with conventional propulsion and enabling up to two hours of silent cruising or up to eight hours of zero-emissions hotel operation while at anchor. The system is based on five 425kW generators and a 1MWh capacity battery pack. Its modular design enhances efficiency and flexibility, while azimuthal pods with rotating propellers improve manoeuvrability and reduce vibration and noise. The entire engine room has been re-engineered to occupy a single deck, freeing up more than 40m² of additional space — a remarkable achievement that has been repurposed to expand the guest and beach areas.  As Sanlorenzo celebrates fifteen years of leadership in steel yacht design, the launch of 58Steel reaffirms the brand’s pioneering role in redefining the 55 to 60 metres segment. It stands as a testament to a philosophy where innovation and elegance are inseparable, where technology serves emotion, and craftsmanship meets conscience. 

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