Description
IS 319 Gr II Free machining brass, resulting from the fusion of copper and zinc, showcases the highest level of machinability among all copper alloys, and serves as the benchmark against which others are measured. IS 319 Gr II Brass is recognized for its strength and corrosion resistance, closely mirroring steel’s attributes, making it one of the most widely embraced copper alloys in contemporary applications. Achieving precision machining with IS 319 Gr II Brass is readily attainable. Despite being ductile in its softened state, IS 319 Gr II Brass remains a robust material, maintaining its strength even when subjected to the most demanding conditions. IS 319 Gr II Brass develops a delicate protective “patina,” setting it apart from steel and iron by preventing rust when exposed to the atmosphere. With its high density, IS 319 Gr II Brass is particularly suited for the creation of heavy-duty industrial components. The highly polished finish of IS 319 Gr II Brass is another highly regarded attribute. This versatile material is offered in a range of shapes, including rounds, flats, squares, hexagons, shapes, and hollows.
Chemical Composition
Mechanical Properties According To IS 319 GR LL (As Per Temper HB)
| Range (mm) |
From |
To |
UTS Min (MPa) |
PS Min |
Elongation Min (%) |
Hardness Min (HV) |
Hardness Max (HV) |
| Round (Dia) |
6 |
12 |
395 |
– |
7 |
120 |
150 |
| 12 |
25 |
385 |
– |
10 |
115 |
145 |
| 25 |
50 |
345 |
– |
15 |
100 |
130 |
| 50 |
75 |
315 |
– |
20 |
90 |
120 |
| Hex (A/F) |
6 |
12 |
395 |
– |
7 |
120 |
150 |
| 12 |
25 |
385 |
– |
10 |
115 |
145 |
| 25 |
50 |
345 |
– |
15 |
100 |
130 |
| 50 |
70 |
315 |
– |
20 |
90 |
120 |
| Square (A/F) |
6 |
12 |
395 |
– |
7 |
120 |
150 |
| 12 |
25 |
385 |
– |
10 |
115 |
145 |
| 25 |
50 |
345 |
– |
15 |
100 |
130 |
| 50 |
60 |
315 |
– |
20 |
90 |
120 |
| Rectangle (Thickness) |
6 |
12 |
395 |
– |
7 |
120 |
150 |
| 12 |
25 |
385 |
– |
10 |
115 |
145 |
| 25 |
50 |
345 |
– |
12 |
100 |
130 |
| PHYSICAL PROPERTIES |
| Melting Point – Liquidus°F |
1650 |
| Melting Point – Solidus°F |
1630 |
| Densitylb/cu in. at 68°F |
0.307 |
| Specific Gravity |
8.5 |
| Electrical Conductivity% IACS at 68°F |
26 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F |
67 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) |
11.4 |
| Specific Heat CapacityBtu/ lb /°F at 68°F |
0.09 |
| Modulus of Elasticity in Tensionksi |
14000 |
| Modulus of Rigidityksi |
5300 |
| FABRICATION PROPERTIES |
| Technique |
Suitability |
| Soldering |
Excellent |
| Brazing |
Good |
| Oxyacetylene Welding |
Not Recommended |
| Gas Shielded Arc Welding |
Not Recommended |
| Coated Metal Arc Welding |
Not Recommended |
| Spot Weld |
Not Recommended |
| Seam Weld |
Not Recommended |
| Butt Weld |
Fair |
| Capacity for Being Cold Worked |
Fair |
| Capacity for Being Hot Formed |
Fair |
| Machinability Rating |
100 |
