320 HT1 possesses good torsional properties and general corrosion resistance. Manganese bronze withstands exposure to dry gases, dilute alkalies, sulfides, and most organic solvents and acids. Though 320Ht1 has common resistance, contact with ammonia, mercury, and most chlorine gas should be avoided.
Chemical Composition
| Elements |
Min (%) |
Max (%) |
| Cu |
56.00 |
60.00 |
| Pb |
0.20 |
1.50 |
| Sn |
0.20 |
1.00 |
| Fe |
0.20 |
1.25 |
| Al |
– |
0.20 |
| Mn |
0.25 |
2.00 |
| Total Others |
– |
0.50 |
| Zn |
Remainder |
Mechanical Properties According To IS 320 HT1 (As Per Temper HB)
| Range (mm) |
From |
To |
UTS Min (MPa) |
UTS Max (MPa) |
PS Min (MPa) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
|
2 |
40 |
480 |
– |
– |
12 |
– |
– |
|
40 |
75 |
460 |
– |
– |
15 |
– |
– |
| Hex (A/F) |
|
2 |
40 |
480 |
– |
– |
12 |
– |
– |
|
40 |
70 |
460 |
– |
– |
15 |
– |
– |
| Square (A/F) |
|
10 |
40 |
480 |
– |
– |
12 |
– |
– |
|
40 |
60 |
460 |
– |
– |
15 |
– |
– |
| Rectangle |
Thickness |
10 |
40 |
480 |
– |
– |
12 |
– |
– |
| PHYSICAL PROPERTIES |
| Melting Point |
940°C |
| Density |
8.63g/cm3 |
| Density |
8.42 g/cm3 |
| Specific Heat |
380 J/Kg*K |
| Thermal conductivity (RT) |
88 W/m°K |
| FABRICATION PROPERTIES |
| Technique |
Suitability |
| Capacity for being Cold formed |
Poor |
| Capacity for Being Hot Worked |
Good |
| Machinability Ration |
30% |
| Resistance to Corrosion |
Excellent |
| Suitability for Soldering |
Excellent |
