Which type of rivet is specifically used for riveting nickel-steel alloys?

The correct answer identifies Monel rivets as specifically suited for riveting nickel-steel alloys. Monel is a nickel-copper alloy known for its excellent resistance to corrosion and its ability to bond well with nickel-steel materials. This compatibility makes Monel rivets ideal for applications requiring a strong bond in environments prone to oxidation or corrosion.

Monel rivets also provide good mechanical properties at elevated temperatures, which is advantageous in aerospace and other engineering applications involving nickel-steel alloys. The ability of Monel to withstand harsh conditions while maintaining structural integrity is a key reason for its use in conjunction with nickel-steel alloys.

Other materials listed may not offer the same level of performance or compatibility with nickel-steel alloys. For instance, aluminum rivets, although lightweight, do not have the same strength or corrosion resistance as Monel when used with nickel-steel. Similarly, steel rivets may not provide the necessary corrosion resistance, and copper rivets, while common in some applications, might not achieve the same level of suitability when riveting nickel-steel alloys.