Description
IS 319 Gr III is a ductile alloy renowned for its excellent machinability and its ability to be easily bent and cold-headed. These attributes make it a fitting choice, particularly for the production of bicycle spoke nipples.
Chemical Composition
Mechanical Properties According To 319 GR III (As Per Temper HB)
| Range (mm) |
From |
To |
UTS Min (MPa) |
PS Min (MPa) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
6 |
12 |
355 |
– |
8 |
– |
– |
| 12 |
25 |
345 |
– |
12 |
– |
– |
| 25 |
50 |
305 |
– |
22 |
– |
– |
| 50 |
75 |
285 |
– |
27 |
– |
– |
| Hex (A/F) |
6 |
12 |
355 |
– |
8 |
– |
– |
| 12 |
25 |
345 |
– |
12 |
– |
– |
| 25 |
50 |
305 |
– |
22 |
– |
– |
| 50 |
75 |
285 |
– |
27 |
– |
– |
| Square (A/F) |
6 |
12 |
355 |
– |
8 |
– |
– |
| 12 |
25 |
345 |
– |
12 |
– |
– |
| 25 |
50 |
305 |
– |
22 |
– |
– |
| 50 |
75 |
285 |
– |
27 |
– |
– |
| PHYSICAL PROPERTIES |
| Density |
8.46 g/cm3 |
| Melting Point |
910°C |
| Specific heat cap at 20˚C |
0.377 (kj/kgK) |
| Electrical conductivity |
14.7 (MS/m) |
| Mod of elasticity |
105 (GPa) |
| Coef of therm exp at 20˚C |
20.4 (10-6 /K) |
| Thermal Conductivity |
116 W/m.K |
| FABRICATION PROPERTIES |
| Machinability (CuZn39Pb3 = 100 %) |
80% |
| Capacity for being cold worked |
poor |
| Capacity for being hot worked |
Fair |
| Suitability for soldering |
Excellent |
| Suitability for Brazing |
Good |
