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ted_yosem
Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
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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

Laurence M. Perks
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?

Jack Visser
- 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.

Steven Yeung
- 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.

Tinyiko Baloyi
- Johannesburg, South Africa
July 22, 2020




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