TMI Technical Materials, Inc.   a Brush Engineered Materials company         •site map     •home

Metal Properties
Selection Guide &
Tech Papers
•Metal Properties Selection Guide
    - Copper
    - Beryllium Copper
    - Brass
    - Bronze
    - Cupro Nickel
    - Spinodal Alloy
    - Nickel Silver
    - Aluminium
    - Glass Sealing
    - Nickel
    - Stainless Steel
    - Solder Alloy
    - Precious Alloys
•TMI Papers



Precious Alloys

PRECIOUS METAL ALLOYS
Description Nominal Composition
Wt. % Essential Elements		 Density
(lbs/in)		 Approximate Knoop Hardness
Annealed 1/2 Hard Spring
24 Kt Gold 99.99 + Au .698 40 60 80
18 Kt Gold 75 Au 25 Ag .577 65 105 125
14 Kt Gold 58 Au 42 Ag .516 70 110 130
12 Kt Gold 50 Au 50 Ag .491 75 115 135
WE #1 69 Au 25 Ag 6 Pt .580 90 125 150
  70 Au 24 Ag 6 Cu .549 115 150 185
  70 Au 20 Ag 10 Cu .543 140 180 220
  96 Au 4 Ni .667 110 170 200
  90 Au 10 Ni .625 205 265 280
Platinum 99.9 Pt .775 75 115 140
Palladium 99.9 Pd .434 70 125 150
  60 Pd 40 Ag .410 110 170 210
  60 Pd 38 Ag 2 Ni .408 155 210 250
  80 Pd 20 Ni .405 170 290 360
TMI 305 * Diffused Au 60 Pd, 40 Ag .439 100 160 190
  44 Pd, 38 Ag, 16 Cu, 1 Ni, 1 Pt .390 170 250 310
  35 Pd, 30 Ag, 14 Cu, 10 Au, 10 Pt, 1 Zn .426 190 260 330
Fine Silver 99.9 Ag .379 40 70 90
Coin Silver 90 Ag, 10 Cu .373 80 95 115
  75 Ag, 24.5 Cu, 0.5 Ni .363 95 110 130
BT 72 Ag, 28 Cu .361 100 110 125
Silver Cadmium Oxide 90 Ag, 10 CdO .368 70 95 130
Silver Tin Oxide 90 Ag, 10 SnO .365 80 100 130
Silver Graphite 99.5 Ag, 0.5 C .377 50 95 100

NOTE * Gold "capped" alloy combinations are not listed in this table.
Example: WE#1 Capped 60 Pd 40 Ag
•About TMI    •Products    •Markets / Applications    •Metal Properties Guide / Tech Papers    •Contact Us    •Brochures    •Site Map    •Home   

TMI 5 Wellington Rd. Lincoln, RI 02865 Phone: 401-333-1700 Fax: 401-333-2848