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	PRODUCT DATA of AA2017-T4

Material

AA2017-T4

General Information

This is a heat treatable (age-hardening) alloy of intermediate strength and good ductility

Precautions

Typical data from the Aluminium Association (AA). Not for design

Chemical Composition

Al-4Cu-0.6Mg0.7Mn-0.5Si-0.1Cr

	EXPERIENCE IN PRACTICE

Development Status

Commercial Product

Equivalent Designations

AlCuMgSi; UNS A92017; NF A-U46, AA 2017

	PHYSICAL PROPERTIES

Crystal Structure

Face centered cubic (fcc)

Specific Gravity

2.79

Magnetic Properties

Nonmagnetic

	ELASTIC PROPERTIES

Tensile Modulus

75 GPa Data Quality: Typical Data

Bulk Modulus

27 GPa Data Quality: Typical Data

	MECHANICAL PROPERTIES

Ultimate Tensile Strength

427 MPa Data Quality: Typical Data

Proof Stress (0.2%)

276 MPa Data Quality: Typical Data

Elongation

22 % Data Quality: Typical Data

Fatigue Limit

124 MPa Data Quality: Typical Data

Hardness

105 HB Data Quality: Typical Data

Shear Strength

262 MPa Data Quality: Typical Data

	THERMAL PROPERTIES

Thermal Conductivity

134 W/m.K

Thermal Expansion Coefficient

23.6 μstrain/°C

Specific Heat

0.88 J/g.K

Melting Range

513 to 641 °C

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

General Corrosion Status

Requires specific corrosion protection

Stress Corrosion Status

Low Resistance to SCC: Table 3 Data Quality: Design Data

EMF vs SCE

-0.61 V

Bimetallic Corrosion

Can be used in a non-controlled environment with: Al+alloys, Cd, Sn-Pb alloys, Sn, Pb Can be used in a clean room environment with: as above and Mg, Ni, Monel, Inconel, Ni-Mo alloys, 300 series SS, 400 series SS, Ti and Ti alloys, Zn, Be Needs specific measures: All others Test:ECSS-Q-ST-70C Rev.1 table 5.1 Data Quality: Design Data

Machinability

Machinability is very good for this alloy in the T4 temper. In the annealed condition machinability is less good. Thus it is best to perform machining with the alloy in the T4 condition. Use of oil lubricants is recommended for all machining operations.

Welding

The alloy may be welded, however welding heat will reduce corrosion resistance. In general welding should be avoided unless heat treatment after welding is possible to restore corrosion resistance. Inert gas welding and resistance welding are the methods that should be used and the alloy is sensitive to cracking so fixturing needs to be such as to reduce any strain during welding.

Aging

This alloy is age hardenable and that occurs naturally at room temperature.