The 2011 alloy is free machining alloy and temper combination.
that compares favorably with free cutting brass. 2011 is the alloy of choice when good strength and high machining rates are desired. It can be machined to very close tolerances and produces excellent machined surface finishes. Resistance welding, corrosion resistance and its ability to be anodized are only fair. Other forms of welding are not recommended. Additional strength, without compromising machinability, can be achieved using the T8 temper.
Others | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Alloying element | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Each | Total | Aluminium |
Weight % | 0.40 | 0.7 | 5.0-6.0 | — | — | — | 0.30 | — | 0.05 | 0.15 | Remainder |
Characteristics | English | Metric | |
---|---|---|---|
Nominal density
(68°F/20°C) |
0.102 lbs/in3 | 2.82 mg/m3 | |
Melting range | 1005°F-1180°F | 541°C-638°C | |
Specific heat
(212 °F/100°C) |
0.206 BTU/lb – °F | 864 J/KG- °K | |
Coefficient of thermal expansion | Linear
68°F – 212°F 20°C – 100°C |
12.8 micro in/in- °F | 23.1 micro in/in- °K |
Volumetric
68 ºF / 20 ºC |
3.72 x 10-5 in.3/in.3 – ºF | 67 x 10-6 m3/m3 – ºK | |
Thermal conductivity
(68°F/20°C) |
T3, T451 | 88 BTU/ft- hr – °F | 152 W/m – °K |
T8 | 100 BTU/ft- hr – °F | 173 W/m – °K | |
Electrical conductivity (68°F/20°C) | Equal volume | T3, T451 | 45% IACS |
T8 | 39% IACS | ||
Equal Weight | T3, T451 | 142% IACS | |
T8 | 123% IACS |
Temper | Tensile | Hardness | Shear | Fatigue | Modulus | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ultimate | Yield | Elongation/ 4D | Brinell
500 kg 10 mm |
Ultimate shearing
strength |
Endurance limit-R.R.Moore type | Modulus of elasticity | |||||||
KSI | MPa | KSI | MPa | 1/16 In. Thick Speciman | KSI | MPa | KSI | MPa | KSIx103 | Gpa | |||
T-3 | 55 | 379 | 43 | 296 | 15 | 95 | 32 | 221 | 18 | 124 | 10.2 | 70 | |
T-8 | 21 | 145 | 20 | 138 | 12 | 100 | 35 | 241 | 18 | 124 | 10.2 | 70 |