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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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Aluminum hardness testing with Webster tester
Q. A new element in our Quality Assurance program is the inspection of our raw material. We own a hand held Webster tester for checking the hardness of our aluminum extrusion but we do not have a table of Webster hardness for the various alloys and temper we use. We are looking for a chart that describes what the Webster reading should be for the following:
6061 T6
6005 T5
6066 T5
6063 T6
6064 T4
RV/Cargo Door mfg. - Nappanee, Indiana
2004
| Aluminum alloy | 1100 | 6063 / T4 | 6063 / T5 | 6063 / T6 | 6061 / T4 | 6061 / T5 | 6061 / T6 |
| Chemical composition: Si | 1.00 max | 0.20-0.60 | 0.20-0.60 | 0.20-0.60 | 0.40-0.80 | 0.40-0.80 | 0.40-0.80 |
| Chemical composition: Fe | 1.00 max | 0.35 max | 0.35 max | 0.35 max | 0.70 max | 0.70 max | 0.70 max |
| Chemical composition: Cu | 0.05-0.20 | 0.10 max | 0.10 max | 0.10 max | 0.15-0.40 | 0.15-0.40 | 0.15-0.40 |
| Chemical composition: Mn | 0.05 max |
0.1 |
0.1 |
0.1 | 0.15 max | 0.15 max |
0.15 max |
|
Chemical composition: Mg |
N/A |
0.45-0.90 |
0.45-0.90 |
0.45-0.90 |
0.80-1.20 |
0.80-1.20 |
0.80-1.20 |
|
Chemical composition: Cr |
N/A |
0.10 max |
0.10 max |
0.10 max |
0.04-0.35 |
0.04-0.35 |
0.04-0.35 |
|
Chemical composition: Zn |
0.10 max |
0.10 max |
0.10 max |
0.10 max |
0.25 max |
0.25 max |
0.25 max |
|
Chemical composition: Ti |
N/A |
0.10 max |
0.10 max |
0.10 max |
0.15 max |
0.15 max |
0.15 max |
|
Chemical composition: others (each) |
0.05 max |
0.05 max |
0.05 max |
0.05 max |
0.05 max |
0.05 max |
0.05 max |
|
Chemical composition: others (total) |
0.15 max |
0.15 max |
0.15 max |
0.15 max |
0.15 max |
0.15 max |
0.15 max |
|
Chemical composition: Al |
99.00 min |
remainder |
remainder |
remainder |
remainder |
remainder |
remainder |
|
Density (lb/cu in) |
0.098 |
0.097 |
0.097 |
0.097 |
0.098 |
0.097 |
0.097 |
|
Specific Gravity |
2.71 |
2.7 |
2.7 |
2.7 |
2.71 |
2.71 |
2.71 |
|
Melting Range (approx.) |
643-657 C |
616-654 C |
616-654 C |
616-654 C |
580-650 C |
580-650 C |
580-650 C |
|
Average coefficient of thermal expansion
(2 C to 100 C)per C
|
23.6 x 1/10^6 |
23.4 x 1/10^6 |
23.4 x 1/10^6 |
23.4 x 1/10^6 |
23.6 x 1/10^6 |
23.6 x 1/10^6 |
23.6 x 1/10^6 |
|
Modulus of elasticity (M Pa) |
68.9 x 10^3 |
68.9 x 10^3 |
68.9 x 10^3 |
68.9 x 10^3 |
68.9 x 10^3 |
68.9 x 10^3 |
68.9 x 10^3 |
|
Temper |
H12 |
T4 |
T5 |
T6 |
T4 |
T5 |
T6 |
|
Hardness (Webster B) |
3 |
4-7 |
8-10 |
11-13 |
6-11 |
12-14 |
14-15 |
|
Tensile strength (M Pa): Ultimate |
97 |
131 |
151 |
206 |
179 |
240 |
260 |
|
Tensile strength (M Pa): Yield |
76 |
68 |
110 |
171 |
110 |
206 |
240 |
|
Shear strength (M Pa): Ultimate |
62 |
N/A |
117 |
152 |
165 |
N/A |
207 |
|
Elongation (% in 50 mm) |
18 |
14 |
7 |
7 |
14 |
7 |
7 |
Jose angel Martinez auces
- Delrio Texas
March 9, 2010
Q. Is there any reliable means of testing hardness of 6063 & 6005 aluminium without using a laboratory test?
We receive COC's with every consignment of aluminium, but have recently experienced material failure and wish to do in-house, factory floor checks, is this possible?
- Johannesburg South Africa
April 15, 2011
A. Hi Jack
I think you can use a Barcol compressor/Webster Hardness Meter to check the hardness. It can't 100% determine whether the material type, but you can have a good hint with the hardness though.
- Dongguan, China
June 18, 2013
Q. What is the Webster hardness ranges of aluminium alloy 6005 T6?
I am in the ladder manufacturing business and it easy to verify material by using a Webster hardness tester.
- Johannesburg, South Africa
July 22, 2020
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