HiTech Alloys
Your HiTech Alloys team understands the new
standards of the world.
The HiTech Alloys team has developed new
alloys that are Lead free and Cadmium free.
We will accommodate your needs.
We also will make any alloy to your specifications.
Let us help you..
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Copyright (C) 2003
Last update: 05/11/2003
Prior to 1930, bismuth alloys existed only as laboratory curiosities. They were known to have very low melting temperatures and low physical strength and a few had been used as low temperature solder for safety devices like sprinkler links, plugs in compressed gas tanks and in fire alarm devices.

Through experimentation and research together with the original work of many customers a large number of new and practical applications have been developed. Accurate information is now available for a number of the applications.

The precise low melting temperatures and controlled shrinkage characteristics make the Hi Tech Alloys valuable tools for industry.
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F U SI B L E A L L O Y S

Bi s m ut h is a h e a vy , br itt le m et al , pi n ki sh in c ol or , of th e at o m ic w ei g ht 20 9 a n d sp e ci fi c gr a vi ty 9. 82 , m el ti n g at 50 2 F (2 71 C) . It is n o n- m a g n et ic a n d sh o w s u n us u al ly hi g h th er m al p ot e nt ia ls in c o u pl es w it h sil v er a n d v ar io us ot h er m et al s. O n se tti n g fr o m li q ui d to so li d it e x p a n ds b y 3. 3 % b y v ol u m e - a pr o p er ly e x hi bi te d b y v er y fe w ot h er n at ur al su bs ta n c es of w hi c h w at er , su lp h ur a n d a nt i m o n y ar e th e b es t k n o w n.
T h e pr o n o u n c e d se tti n g e x p a ns io n of bi s m ut h is re fl e ct e d in th e b e h a vi or of bi s m ut h- ri c h al lo ys . M os t al lo ys c o nt ai ni n g 45 % or m or e of bi s m ut h e x p a n d o n so li di fi c at io n. T hi s u ni q u e p os t-s ol id ifi c at io n gr o w th n e ar s c o m pl et io n in a fe w h o ur s b ut in so m e c as es c a n sti ll b e d et e ct e d se v er al h u n dr e d h o ur s af te r so li di fi c at io n.
Al lo ys of bi s m ut h w it h c o m m o n m et al s ar e m os tl y of u n us u al ly lo w m el ti n g p oi nt , m a n y m el ti n g w el l b el o w th e b oi li n g p oi nt of w at er , a n d th e y ar e th er ef or e c o m m o nl y te r m e d th e "f us ib le al lo ys ". T h e y ar e in g e n er al of hi g h sp e ci fi c gr a vi ty , re la ti v el y so ft, of lo w te ns il e st re n gt h, br itt le to sh o ck , y et su bj e ct to pl as ti c fl o w u n d er lo a d. T h e y ar e p o or c o n d u ct or s of h e at a n d el e ct ri ci ty a n d in m os t c as es ar e sli g ht ly di a m a g n et ic .
T h e in d us tri al a p pl ic at io ns of "f us ib le al lo ys " ar e m ai nl y b as e d o n t w o of th ei r m aj or c h ar a ct er ist ic s n a m el y lo w m el ti n g te m p er at ur e a n d n o n- sh ri n ki n g or e x p a n di n g pr o p er ti es . A n u m b er of e ut e ct ic a n d n o n- e ut e ct ic al lo ys h a v e b e e n st a n d ar di z e d a n d ar e pr o d u c e d b y C er ro M et al Pr o d u ct s C o m p a n y, B el le fo nt e, P A, u n d er th e " C E R R O " tr a d e m ar k.
FUSIBLE ALLOYS
Bismuth is a heavy, brittle metal, pinkish in color, of the atomic weight 209 and specific gravity 9.82, melting at 502 F (217 C). Bismuth is non-magnetic and shows unusually high thermal potentials when coupled with silver and various other metals. On setting from liquid to solid it expands by 3.3% by volume - a property exhibited by very few other natural substances of which water, sulphur and antimony are the best known.

The pronounced setting expansion of bismuth is reflected in the behavior of bismuth-rich alloys. Most alloys containing 45% or more of bismuth expand on solidification. This unique post-solidification growth nears completion in a few hours but in some cases can still be detected several hundred hours after solidification.

Alloys of bismuth with common metals are mostly of the unusually low melting point, many melting well below the boiling point of water, and they are therefore commonly termed the "fusible alloys". They are in general of high specific gravity, relatively soft, of low tensile strength, brittle to shock, yet subject to plastic flow underload. They are poor conductors of heat and electricity and in most cases are slightly diamagnetic.

The industrial applications of "fusible alloys" are mainly based on two of their major characteristics namely low melting temperature and non-shrinking or expanding properties.
HTA alloys are made in America for the World.
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