A continuous cast (UNS-C95900) aluminum-iron-copper
alloy recommended for heavier-duty applications involving compressive wear and high
abrasion, especially where no impact is present.
Uses include: die rings, forming rolls, inserts, wiping blocks, cam followers, pilot
bushings, dies and drill jig bushings. Also, offers proven performance in plastic mold
applications - ejector sleeves and bushings, guide pin and leader pin bushings, wear
MoldStar®21 alloy will maintain mechanical
properties at temperatures up to 6000F and has a
machinability rating of 20%. The alloy provides corrosion resistance to non-oxidizing
mineral acids. Can be welded with both gas-shielded and shielded metal-arc processes.
Brazing, soldering and oxyfuel gas welding are not recommended.
Cold working is not recommended. Hot formability is good with a forgeability rating of
75%. MoldStar®21 alloy can be hot worked at
temperatures from 13750 to 15500F
and annealed between 11000 and 12000F.
The consistent superiority of MoldStar®21
alloy over commercial bronze is due, in large part, to the unique distribution of the
CDA C62500, C95900
(based on 1" test bars)
|Tensile Strength (ksi)
|Yield Strength (ksi)
|Elongation, % in 2"
|Hardness- Rockwell C
|Ultimate in Compression (ksi)
|Proportional Limit (ksi)
|Impact - Charpy Keyhole (ft-lbs)
|Modulus of Elasticity (tension), (ksi)
*Properties are shown for comparative information only
|Coefficient of Thermal Expansion
|9.0 x 10-6
|Electrical Resistivity (Microhms-Meter @ 680F)
(Btu/sq. ft./ft./hr./0F @ 680F)