HS6X (HIGH-STRENGTH 6000 SERIES ALLOY)*

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Sapa Extrusions North America
Aluminum
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AUTOMOTIVE/TRANSPORTATION
HS6X (HIGH-STRENGTH 6000 SERIES ALLOY)*
Sapa Extrusions developed the HS6X alloy for automotive applications where the cost of high strength alloys such as 7003
and 7005 would be cost prohibitive. HS6X offers a higher strength than other 6XXX series alloys, such as 6082, but at
lower cost and higher productivity than the 7XXX series alloys.
Alloy HS6X offers a strength up to 10% higher than 6082 at productivity levels nearly 20% better than high strength
7XXX series alloys commonly used in automotive applications. Alloy HS6X also offers a density advantage over 7XXX alloys.
These attributes can make HS6X an attractive option for a wide range of structural automotive applications.
HS6X ingot processing costs are similar to 6082 and the alloy shows very good grain structure. Alloy HS6X offers
good weldability, brazeability, corrosion resistance, formability and machinability. However since HS6X is a heat treatable
alloy, strength will be reduced in the weld region. When bending or forming HS6X alloy, it is recommended to use the T4
temper. Various commercial joining methods (friction stir welding, riveting, etc.) can be easily applied to HS6X alloy.
Typical Applications for HS6X Alloy
• Crash management systems
• Structural profiles
• Custom profiles
HS6X Temper Designations and Definitions
Standard Tempers
Standard Temper Definitions*
T4
Solution heat-treated and naturally aged. (See Note A)
T4S
Solution heat treated and stabilize aged to provide more consistency in forming operations.
T6, T6511
Solution heat-treated and artificially aged. (See Notes A and B)
*
For further details of definitions, see Aluminum Association’s Aluminum Standards and Data manual and Tempers for Aluminum and Aluminum Alloy Products.
Note A: Applies to products that are not cold worked after solution heat-treatment, or in which the effect of cold work in flattening or straightening
may not be recognized in mechanical properties.
Note B: Temper -T5511 and -T6511 applies to products that are stress-relieved by stretching.
Chemical Composition
Others
Alloy
Si
Fe
Cu
Mn
Mg
Cr
Zn
Ti
HS6X
0.90 - 1.2
0.5 max
0.05 - 0.3
0.75 max
0.7 - 1.0
0.25 max
0.05 max
0.1 max
Each
Total
0.05
0.15
Aluminum = Remainder
Chemical composition in weight percent maximum unless shown as a range or minimum.
Physical Properties
Specific Heat1
0.821 (J/g*K)
0.1961 BTU/(lb*°F)
66.88 Gpa
9.7 Msi
25.63 (mm/(m*°C)
14.24 (min/(in*°F))
Density
2.69 g/cm3
0.097 lb/in3
Typical Thermal Conductivity
179 (W/m*K)
1241.1 BTU*in/(ft2*hr*°F)
Melting Range
575 - 650 °C
1070 - 1200 °F
2
Young's Modulus
3
Coefficient of Linear Thermal Expansion (20° - 200°C)
4
1 - Tested per ASTM E1269-11 2 - Tested per ASTM E111-04 3 - Tested per ASTM E831-13
4 - As calculated per the Aluminum Association's Standards and Data methodology
• Patent Pending
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AUTOMOTIVE/TRANSPORTATION
HS6X (HIGH-STRENGTH 6000 SERIES ALLOY)
Typical Tensile Properties1
Note: all properties apply to hollow structural extrusions 4 mm and less in thickness.
Alloy
Standard Tempers Tensile Strength MPA (Ksi) Yield Strength MPA (Ksi)
HS6X
352 (51.1)
T6/T6511
Elongation3 (min.)
335 (48.6)
11.3%
Typical Tensile Properties1
Based on 5 days of natural aging (no minimums established at this time)
Alloy
Standard Tempers Tensile Strength MPA (Ksi) Yield Strength MPA (Ksi)
HS6X
278 (40.3)
T4
Elongation3 (min.)
161 (23.4)
21%
Minumum Tensile Properties1
Note all properties apply to hollow structural extrusions 4 mm and less in thickness.
Alloy
Standard Tempers
Tensile Strength
Yield Strength
Elongation3 (min.)
HS6X
T6/T6511
337 MPa (48.8 ksi)
320 MPa (46.4 ksi)
8%
6061
T6/T6511
260 MPa (38 ksi)
240 MPa (35 ksi)
8%
T4/T4511
180 MPa (26 ksi)
110 MPa (16 ksi)
16%
T6/T6511
310 MPa (45 ksi)
290 MPa (42 ksi)
8%
T4/T4511
220 MPa (32 ksi)
120 MPa (17.5 ksi)
16%
T5/T5511
390 MPa (56 ksi)
345 MPa (50 ksi)
11%
6082
7003
1. Minimum property levels unless shown as a range or indicated as a maximum (max.) T6, T6511 property limits per Aluminum Association
2. The thickness of the cross section from which the tension test specimen is taken determines the applicable mechanical properties.
3. For materials of such dimensions that a standard test specimen cannot be taken, or for shapes thinner than .062”, the test for elongation is not required.
Elongation percent is minimum in 2” or 4 times specimen diameter.
4. Elongation values represent “A” elongation per BS EN 755-2
Comparative Characteristics of Related Alloys/Tempers1
Alloy
Temper
Formability
D C B A
Machinability
D C B A
General
Corrosion
Resistance
D C B A
Weldability
D C B A
HS6X T4
T6, T6511
6082
T4
T6, T6511
6063
T1, T4
T6
6061
T4
T6, T6511
1. Rating: A = Excellent B = Good C = Fair D = Poor
SAPA EXTRUSIONS NORTH AMERICA
9600 Bryn Mawr Avenue, Rosemont, IL 60018
Phone: 877-710-Sapa (877-710-7272) • Email: NorthAmerica.Sales@sapagroup.com
www.sapagroup.com/NA
Information and specifications herein subject to change without notice
©2015 Sapa Extrusions
Brazeability
D C B A
Anodizing
Response
D C B A