|
90% W
*6% Ni
4% Cu |
90% W
7% Ni
3% Fe |
92.5%W 5.25%Ni
2.25Fe |
93%W
Balance
Ni Fe Mo |
95%W
3.5%Ni
1.5%Cu |
95%W
3.5%Ni
1.5%Fe |
97% W
2.1% Ni
.9% Fe |
MIL-T 21014D |
Class 1 |
Class 1 |
Class 2 |
* Chip Resistant |
Class 3 |
Class 3 |
Class 4 |
SAE AMS |
7725B |
7725B |
|
|
|
|
|
ASTM-B-777-87 |
Class 1 |
Class 1 |
Class 2 |
|
Class 3 |
Class 3 |
Class 4 |
Density Gms/cc |
17 |
17 |
17.5 |
17.7 |
18 |
18 |
18.5 |
Density Lbs/Cu. In |
0.614 |
0.614 |
0.632 |
0.639 |
0.65 |
0.65 |
0.688 |
Hardness Rc |
24 |
25 |
26 |
32 |
27 |
27 |
28 |
UTS (Psi) |
110,000 |
120,000 |
114,000 |
125,000 |
110,000 |
120,000 |
123,000 |
Yield .2% Offset (Psi) |
80,000 |
88,000 |
84,000 |
95,000 |
85,000 |
90,000 |
85,000 |
Elongation-% in 1” |
6 |
10 |
7 |
4 |
7 |
7 |
5 |
Proportional Elastic
Limit (Psi) |
45,000 |
52,000 |
46,000 |
60,000 |
45,000 |
44,000 |
45,000 |
Modulus / Elasticty
(Psi) |
40 x 10
6 |
45 x 10
6 |
47 x 10
6 |
53 x 10
6 |
45 x 10
6 |
50 x 10
6 |
53 x 10
6 |
Coefficient of Thermal
Expansion x 10-6/C (20-400C) |
5.4 |
4.61 |
4.62 |
4.5 |
4.43 |
4.6 |
4.5 |
Thermal Cond (CGS) |
0.23 |
0.18 |
0.2 |
0.27 |
0.33 |
0.26 |
0.3 |
Elec Conductivity (%
IACS) |
14 |
10 |
13 |
14 |
16 |
13 |
17 |
Magnetic Properties |
Nil |
Slightly |
Slightly |
Slightly |
Nil |
Slightly |
Slightly |
These alloys are used where high density, strength
and machinability are required.
All Falcon’s
Tungsten products are produced to ISO 9002 and AS 9000
*Typical composition. Composition can be changed
as required. Properties may vary according to
size and shape.
If
non-magnetic material is required, it must be specified at time of order.
Machining & Finishing High Density Tungsten Based
Metals
Machining is similar to machining gray cast iron. Coolants
are optional, but carbide tools are
recommended in most cases.
TURNING & BORING: Roughing – use C-2 Carbide
with cutting depth of .030” to .125” and
.008” - .015” feed, at 200 to 200 SFM. Finishing
- .010 to .015 cutting depth and .004-.010 feed at
250-400 SFM.
DRILLING: Use high speed steel surface treated
drills with plain points. Increased clearance
angles and automatic feeds are often used to avoid
binding and seizing. Carbide drills will give
better tool life. A chlorinated oil is sometimes
used as a coolant.
TAPPING: Use High-speed or carbide, two flute
plug spiral point taps. Use chlorinated oil or
tapping compound is recommended.
GRINDING: Use aluminum oxide or silicon carbide
wheels of medium hardness.
SAWING – CUTTING: When sawing, use a bi-metal
coarse blade at high speeds, or a high-speed course
blade at low speed. Coolant can be used. Material
can be cut using high-speed cutoff wheels.
MILLING: Use M-2 high-speed steel for light cuts
and M-42 high-speed steel for deep cuts. Carbide
cutter inserts will extend tool life. We recommend
when using carbide, feeds of .007-.015” per tooth
at speeds of 200-400 SFM for roughing, and when finished,
feeds of .003-.010” per tooth 300-700 SFM. Our
high-density tungsten alloys are not heat treatable;
however, stress relieving is sometimes done on machined
parts. We suggest heating 600F in air for 2 hours
and air cool in air or heating in a protective atmosphere
at 900f for 30 minutes.
The
material’s characteristics and its low thermal
expansion allow very close tolerances and fine finishes.
*New Alloy: Chip Resistant
Tungsten: 93%W Bal. Ni, Fe & Mo.
This alloy replaces Tungsten Carbide in most boring & grinding operations.
Available Forms: IN STOCK – Round
Bar, Flat Bar, Square Bar, Sheet & Wire
Also Available: Commercially Pure Tungsten,
Copper Tungsten & Silver Tungsten
Machining Available for Tungsten Alloys:
*State of the art” machine shop can produce to near net/net, and
finished parts as per your drawings.
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