High Strength Polished Tungsten Heavy Alloy BlocksTungsten Heavy Alloy Blocks are mainly divided into two series
of W nickel iron and W nickel copper, and even W nickel iron
copper. In contrast, West Nickel-Fe alloy has better mechanical
properties and plays an important role in the defense industry and
various sectors of the national economy. It is a very important new
military material in the national defense industry, and has
gradually expanded to various civilian industries. Introduction & Features of Tungsten Heavy Alloy BlocksHigh density: the density of tungsten alloy can reach 18.5g/cm3,
and the volume is much smaller than other materials under the same
mass. Corrosion resistance: The chemical properties of tungsten alloys
are stable and do not react with any substances at room
temperature. Fishing pendants are used for long-term contact with
water. If it is iron material, it is easy to be oxidized. High hardness: The hardness of tungsten alloy is second only to
that of diamond, and it has considerable hardness. The fishing
pendant will inevitably collide with hard objects during use. The
high hardness material can make the spreader not easy to break and
deform.
SPECIFICATION & CHEMICAL COMPOSITION (NOMINALS)| Chemical Composition | 90%W | 93%W | 95%W | 97%W | | State | Sinter | Vacuum | Forge | Sinter | Vacuum | Forge | Sinter | Vacuum | Sinter | Vacuum | Density
(g/cc) | 16.85-17.25 | 17.15-17.85 | 17.75-18.35 | 18.25- 18.85 | Hardness
(HRC) | 32 Max | 30 Max | 40 Min | 33 Max | 31 Max | 40 Min | 34 Max | 32 Max | 35 Max | 33 Max | | Tensile Strength (Max) | 770 Min | 900 Min | 1400
Max | 770 Min | 910 Min | 1440 Max | 735 Min | 920 Min | 700 Min | 850 Min | Yield Strength
(Mpa) | 620 Min | 620 Min | 1280 Max | 650 Min | 650 Min | 1340 Max | 650 Min | 650 Min | - | - | Elongation
(%) | 5 Min | 15 Min | 5 Min | 5 Min | 12 Min | 3 Min | 3 Min | 12 Min | 2 Min | 6 Min |
Application of Tungsten Heavy Alloy BlocksThe weight in the automatic watch uses the slight movement of the
arm and the inertia of the weight to drive the winding, in order to
achieve the purpose of automatic winding. The greater the gravity
of the hammer, the greater the inertia energy and the longer the
travel time. Therefore, the hammer material needs to have
sufficient gravity, non-magnetic, moderate strength and good
corrosion resistance, and can be machined into another precision
part. At present, some famous Brands of Swiss automatic watches use
this alloy, most of which are W-NICU alloy. When in use, gold or
nickel plating should be applied to the surface of the hammer parts
to improve corrosion resistance and aesthetics. China has also
adopted high gravity tungsten alloy as the weight material for
automatic watches.
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