Using the phase diagram below, determine the melting point of an alloy that is 60% nickel.

• A. 1084℃
• B. 1240℃
• C. 1310℃
• D. 1375℃
• E. 1455℃

Answer: (C)

Verified step by step guidance

1. Identify the x-axis of the phase diagram, which represents the mole percent of nickel in the alloy. Locate the point corresponding to 60% nickel.
2. Observe the y-axis, which indicates the temperature in degrees Celsius. This axis will help determine the melting point of the alloy.
3. Find the intersection of the 60% nickel line with the phase boundary line that separates the 'Solid alloy' region from the 'Liquid' region. This boundary line is typically the solidus line.
4. Read the temperature value at this intersection point on the y-axis. This temperature represents the melting point of the alloy with 60% nickel.
5. Verify the temperature value against the given options to ensure it matches one of the provided melting point values.