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	PRODUCT DATA of AA6063

Material

AA6063

General Information

Aluminium-Magnesium-Silicon Alloy (ISO AlMgSi). This is generally considered to be an extrusion alloy that is heat treatable for strengthening Very good corrosion resistance. Very good weldability. Medium strength heat treatable alloy slightly lower than 6005A. Medium fatigue strength. Good cold formability especially in temper T4. Suitable for very complex cross sections.

Chemical Composition

0.4% to 0.9% Mg, 0.3% to 0.7% Si, Rem. Al

Name of Manufacturer

Corus

	EXPERIENCE IN PRACTICE

Development Status

Commercial Product

Cost Range

Very Low

Space Experience

Good

	PHYSICAL PROPERTIES

Crystal Structure

Face centered cubic (fcc)

Specific Gravity

2.7

Magnetic Properties

Nonmagnetic

	MECHANICAL PROPERTIES

Ultimate Tensile Strength

155 to 210 MPa @ Room Temperature

Proof Stress (0.2%)

90 to 180 MPa @ Room Temperature

Elongation

8 to 14 % @ Room Temperature

	ELECTRICAL PROPERTIES

Electrical Volume Resistivity

3.4e-8 ohm.m @ Room Temperature

	THERMAL PROPERTIES

Temperature Range

217 °C(maximum)

Thermal Conductivity

197 to 201 W/m.K @ Room Temperature

Thermal Expansion Coefficient

23 µstrain/°C @ Room Temperature

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

General Corrosion Status

No specific corrosion protection required

Atmospheric Corrosion

Moderate resistance to atmospheric corrosion. For more severe environments, part can be either: Chromated, Chromated and painted, Sulphuric anodised, or Chromic anodised.

Stress Corrosion Status

High Resistance to SCC: Table 1 Data Quality: Design Data

EMF vs SCE

-0.75 V

Bimetallic Corrosion

Can be used in a non-controlled environment: Al alloys, Cd Can be used in a clean room environment: Mg, Sn-Pb alloys (all), Sn, Pb, Zn, Be Needs specific measures: All others< Remark: ECSS-Q-ST-70C Rev.1 table 5.1 Data Quality: Design Data

Machinability

Machinability is considered to be average for this alloy

Welding

The alloy is readily welded by all of the conventional methods.

Aging

Aging is done at a temperature of 193 C for 8 hours for T 6 and T 62 tempers. Age at 182 C for 3 hours to get T5 temper.

	FLUID SYSTEMS COMPATIBILITY

Gaseous Oxygen (GOX)

Meets the mechanical impact requirements. No batch test required.

Liquid Oxygen (LOX)

Meets the mechanical impact requirements. No batch test required.

Nitrogen Tetroxide (N2O4)

SCC susceptibility is low and no fluid decomposition

Hydrazine (HDZE)

SCC susceptibility is low and no fluid decomposition