Hitachi Powdered Metals (USA), Inc. has been
supplying the highest quality, technologically advanced powdered metal products
in North America since 1989. Our customers know they can rely on us to deliver
the most innovative designs while maintaining stringent tolerance requirements.
Hitachi Powdered Metals (USA), while the dominant
Valve Guide supplier in North America, also manufactures Structural parts
(timing pulleys, sprockets/VCT, and sensor plates) primarily for the automotive
industry. The remainder of our product line supports motorcycle and lawn &
Hitachi Powdered Metals (USA) is owned by
Hitachi Powdered Metals Co., LTD
of Japan, the largest powdered-metal company in Asia. As our parent company,
Hitachi supports all North American operations with materials development,
intricate tool design, and functional engine testing. This ensures Hitachi
Powdered Metals (USA)'s abilities to meet rigorous demands of the market.
Powdered metallurgy was practiced long before
ancient artisans learned to melt and cast iron. The Egyptians made iron
tools using P/M techniques from at least 3000 B.C. The ancient Inca
Indians also made jewelry and artifacts from precious metal powders. The
first modern P/M products was the tungsten filament for electric light bulbs
developed in the early 1900's. This was followed by tungsten carbide
cutting tool material in the 1930's, automobile parts in the '60s and '70s,
aircraft turbine engine parts in the '80s, and parts made by powder forging
(P/F), metal injection molding (MIM) and warm compacting in the '90s.
Powder Metallurgy, or P/M, is a highly developed
method of manufacturing reliable ferrous and nonferrous products. Made by
mixing elemental or alloy powders and compacting the mixture in a die, the
resultant shapes are then sintered or heated in a controlled atmosphere furnace
to bond the particles metallurgically. Basically, a "chipless"
metalworking process, P/M typically uses more than 97% of the starting raw
material in the finished part. Because of this, P/M is energy and
materials conserving process.
The P/M process is cost effective in producing
simple or complex parts at, or, very close to, final dimensions in production
rates which can range from a few hundred to several thousand parts per hour.
As a result, only minor machining is required. P/M parts also may be sized
for closer dimensional control and / or coined for both higher density and
Most P/M parts weigh less than 5 pounds (2.27kg),
although parts weighing as much as 35 pounds (15.89kg) can be fabricated in
conventional P/M equipment. Many of the early P/M parts, such as bushings
and bearings, were very simple shapes, as constrasted with the complex contours
and multiple levels, which are often produced economically today.
Advantages of the P/M process;
Eliminates or minimizes machining
Eliminates or minimizes scrap loses
Maintains close dimensional tolerances
Permits a wide variety of alloy systems
Produces good surface finishes
Provides material which may be heat-treated for
increased strength or increased wear resistance
Provides controlled porosity for self-lubrication
Facilitates the manufacturing of complex or unique
shapes with other processes
Offers long-term performance reliability in
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Powdered Metals (USA), please send your inquiries to: