IS 320 HT1
DESCRIPTION
320 HT1 possesses good torsional properties and general corrosion resistance. Manganese bronze withstands exposure to dry gases, dilute alkalies, sulfides, most organic solvents and acids. Though 320 HT 1 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) |
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 | 8.42 g/cm³ |
| Specific Heat | 380 J/Kg°K |
| Thermal conductivity (RT) | 88 W/m°K |
| Thermal expansion coefficient (20-200°C) | 20 x 10-6 |
| Electrical conductivity | 18% IACS |
| Electrical Resistivity | 0.082 ohm mm²/m |
| FABRICATION PROPERTIES |
| Capacity for being Cold formed | Poor |
| Capacity for being Hot worked | Good |
| Machinability Ration | 30% |
| Resistance to Corrosion | Excellent |
| Suitability for soldering | Excellent |
TYPICAL USES
- Architectural applications
- High strength components
- Valves
- Valve stems
- Fittings
- Marine fittings
