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Material:
Mallory
353
Composition:
CuNiCrSi
Standard
Analysis:
Ni 2,4
(in
percent by weight)
Cr 0,4
Si 0,7
Cu balance
Description of Material:
Hardenable Cu-alloy with
high electrical and thermal
conductivity together
with a very high degree of hardness
and strength
Examples of Application:
Plungers in cold chamber
diecasting machines (light metal
casting).
Casting dies for non-ferrous
metal casting.
Mechanical Properties (at 20o
C):
Condition |
Hardened |
|
| Hardness (mean) |
HB
10/2,5 |
180
- 220 |
| Tensile Strength |
N/mm2 |
500
-700 |
| Apparent Yield Point |
N/mm2 |
450
- 600 |
| Elongation |
% |
Min.5 |
| Module of elasticity |
N/mm2 |
115
x 103 |
Physical Properties (at 20o
C):
| Condition |
Hardened |
|
| Specific weight |
gcm3 |
8.7 |
| Specific Heat |
J g.K |
0,42 |
| Heat Conductivity |
W
m.K |
160 |
| Coefficient of expansion |
1 K |
20
- 100o C 16 x 106 |
| Electrical Conductivity |
M Ohm.mm2 |
Ca.25 |
Form of Delivery: Round, flat, square bars, forging plates, finished parts to drawing.
Processing Information:
Hot Working
Mallory 353 can be easily hot worked at 900 - 700oC approx. The forming operation should be followed by rapid cooling.
Cold-forming
Mallory 353 can be cold-worked well in a solution heat-treated state. Perform intermediate annealing at around 800oC followed by rapid cooling.
Heat Treatment
Mallory 353 should be solution heat-treated prior to temperature hardening.
Solution heat-treating.
15 - 60 minutes at 900
- 960oC followed by cooling in water.
Hardening: 1 - 5 hours
at 460 - 480oC followed by slow cooling.
It is recommended that
Mallory 353 be machined in its hardened state (e.g. turning, shaving, milling).
Ensure adequate cooling. When
drilling it is advantageous to use drills with an extended angle of twist.
Joining Work
Mallory
353 can be soft-soldered on prepared surfaces.
Brazing with low-melting point silver fillers can also be implemented.
However, a drop in the hardness is likely when the soldering temperature
cannot be limited to 400oC.
Welding in accordance with the TIG method is possible but preferably
in a solution heat-treated state. Ensure
good ventilation in so doing and provide additional extraction of welding fumes
by suction.
| All Mallory Alloys Group products conform to, if not exceed, the relevant standards as assured by the Quality Management System |  |
© Copyright 2004 Mallory Group Limited, all rights reserved.