Melting Points

The melting point of a solid is the temperature at which the vapor pressure of the solid and the liquid are equal

Melting Points Measurements

The melting point of a solid is the temperature at which the vapor pressure of the solid and the liquid are equal. At the melting point the solid and liquid phase exist in equilibrium. When considered as the temperature of the reverse change from liquid to solid, it is referred to as the  freezing point or crystalization point. Because of the ability of some substances to supercool, the freezing point is not considered to be a characteristic property of a substance. When the "characteristic freezing point" of a substance is determined, in fact the actual methodology is almost always "the principle of observing the disappearance rather than the formation of ice", that is, the melting point.

Molten Metal Pouring

Melting Point Measurements

Many laboratory techniques exist for the determination of melting points.  A Kofler is a metal strip with a temperature gradient (range room temperature to 300 °C). Any substance can be placed on a section of the strip revealing its thermal behavior at the temperature at that point. Differential scanning calorimetry gives information on melting point together with its   enthalpy of fusion.

A basic melting point apparatus for the analysis of crystalline solids consists of a oil bath with a transparent window (most basic design: a theile tube) and a simple magnifier. The several grains of a solid are placed in a thin glass tube and partially immersed in the oil bath. The oil bath is heated (and stirred) and with the aid of the magnifier (and external light source) melting of the individual crystals at a certain temperature can be observed. In large/small devices, the sample is placed in a heating block, and optical detection is automated.

                     Metal Melting Points

Melting Points

 Thermometrics, our guiding objectives are Customer Satisfaction and Continuous Improvement. We accomplish this through monitoring our systems, measuring our performance and employee development. Our goal is to continually work at being the most successful company in the world, in delivering the highest quality of products, technology, competitive pricing, continuous customer service and satisfaction.



Metal Melting Point (Deg F)
mild steel 2730
wrought iron 2700-2900
stainless steel 2600
hard steel 2555
cast iron 2060-2200
copper 1985
red brass 1832
silver 1763
yellow brass 1706
aluminum alloy 865-1240
magnesium alloy 660-1200
lead 621
babbit 480


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Much of the near-term product opportunities are targeted toward lowering manufacturing or maintenance costs in industrial/chemical processing. Metals and alloys are extensively used in these industries over a range of temperatures and harsh environments. Surface modifications of these substrates will enable extended lifetimes, better performance, and in some cases, even improve the quality of the final product. Corrosion or oxidation of these parts presents a major problem for industries requiring frequent replacement of parts and increasing production costs due to downtime and other related factors. Due to the thin, dense, and hermetic nature of Thermoblak, it can be implemented readily with highly effective protection.