The range of MCP low melting-point alloys includes formulations specially suited to supporting irregular or flimsy shapes during machining.

MCP Quality

The alloys are produced from a high-grade constituents, following strict specifications. Quality is monitored by an accredited system conforming to ISO 9002.


Precision

MCP low melting-point alloys have mechanical properties easily sufficient for the necessary rigidity and control in locating and supporting operations. The low temperatures at which they are used ensure that heat distortion during seting-up and melting-off is minimised.


Stability & Durability

With proper attention to usage, the alloy compositions remain stable for long periods of repetitive use. The specially designed MCP melting pots are recommended. If the composition is found to have drifted away from the original specification, it can usually be corrected in-house by the user. For this purpose, a testing service is available at the Wellingborough production laboratory. The corrective amounts of constituents can be supplied as a specially formulated alloy.


Choice of Alloy

Alloy
Designation
Melting
Point
Indications For Use
MCP 70
70-75°C
158-167°F
 Recommended as a temporary filler for hollow shapes, e.g. setting a hollow part on a spindle. Slight expansion on solidifying.
MCP 137
135°C
275°F
 Minimal volume change on solidifying. Suitable for encapsulating irregular parts. A removable steel bolster provides an external shape, and parts to be machined can be kept in an exact spatial relationship to the reference faces so formed.
MCP 220
Completely molten above 250°C (482°F)
Completely solid below 95°C (203°F).
 Long melting range allows the partly solid alloy to accommodate to a shape being filled. Can be used, for example, in making perfectly fitting, re-usable, split chuck jaws by sawing through the pattern and the encapsulating alloy.


Safety & The Environment
The recommended alloys are not classified as 'dangerous' for either carriage or supply. They are easy to handle, and quite safe when the rules for normal handling are observed.