Description
C675 exhibits commendable torsional properties and offers solid general corrosion resistance. Manganese bronze, in general, is capable of withstanding exposure to dry gases, dilute alkalies, sulfides, as well as most organic solvents and acids. However, it’s important to note that C675 may not be suitable for contact with ammonia, mercury, and the majority of chlorine gases, and such interactions should be avoided.
Chemical Composition
| Elements | Min (%) | Max (%) |
| Cu | 57.00 | 60.00 |
| Pb | – | 0.20 |
| Sn | 0.50 | 1.50 |
| Al | – | 0.25 |
| Fe | 0.80 | 2.00 |
| Mn | 0.05 | 0.50 |
| Total Others | – | 0.50 |
| Zn | Remainder |
Mechanical Properties According To ASTM B138 (As Per Temper HO2)
| Range (Inch) |
From |
To |
UTS Min (Ksi) |
PS Min (Ksi) |
Elongation Min (%) |
Hardness Min (HRB) |
Hardness Max |
| Round (Dia) |
0.059 | 1.000 | 72 | 36 | 13 | – | – |
| 1.000 | 2.500 | 70 | 35 | 15 | – | – |
| 2.500 | 2.953 | 65 | 32 | 17 | – | – |
| Hex (A/F) |
0.118 | 1.000 | 72 | 36 | 13 | – | – |
| 1.000 | 2.500 | 70 | 35 | 15 | – | – |
| 2.500 | 2.756 | 65 | 32 | 17 | – | – |
| Square (A/F) |
0.118 | 1.000 | 72 | 36 | 13 | – | – |
| 1.000 | 2.362 | 70 | 35 | 15 | – | – |
| Rectangle (Thickness) |
0.118 | 1.000 | 72 | 36 | 13 | – | – |
| 1.000 | 1.968 | 70 | 35 | 15 | – | – |
| Range (mm) |
From |
To |
UTS Min (Mpa) |
PS Min (Mpa) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
1.5 | 25 | 500 | 250 | 13 | – | – |
| 25 | 65 | 450 | 240 | 15 | – | – |
| 65 | 75 | 450 | 220 | 17 | – | – |
| Hex (A/F) |
3 | 25 | 500 | 250 | 13 | – | – |
| 25 | 65 | 450 | 240 | 15 | – | – |
| 65 | 70 | 450 | 220 | 17 | – | – |
| Square (A/F) |
3 | 25 | 500 | 250 | 13 | – | – |
| 25 | 60 | 450 | 240 | 15 | – | – |
| Rectangle (Thickness) |
3 | 25 | 500 | 250 | 13 | – | – |
| 25 | 50 | 450 | 240 | 15 | – | – |
Physcial Properties
| Melting Point – Liquidus°F | 1630 |
| Melting Point – Solidus°F | 1590 |
| Density lb/cu in. at 68°F | 0.302 |
| Specific Gravity | 8.36 |
| Electrical Conductivity % IACS at 68°F | 24 |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F | 61 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11.8 |
| Specific Heat Capacity Btu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tension ksi | 15000 |
| Modulus of Rigidity ksi | 5600 |
Fabrication Properties
| Technique |
Suitability |
| Soldering | Excellent |
| Brazing | Excellent |
| Oxyacetylene Welding | Good |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Good |
| Seam Weld | Fair |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Poor |
| Capacity for Being Hot Formed | Excellent |
| Forgeability Rating | 80 |
| Machinability Rating | 30 |
