Aluminum 3105 (UNS A93105)

Description

Aluminum alloy 3105 is essentially a 98% aluminum alloy with minor additions to increase strength over that of alloy 1100 and 3003. It is not hardenable by heat treatment and it has good corrosion resistance, formability and weldability.

Typical applications include general sheet metal work requiring greater strength than is provided by 1000 series aluminum alloys, residential siding, mobile homes and sign making.

Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM B209 and ASME SB209*
Element 3105
Silicon 0.6
Iron 0.7
Copper 0.30
Manganese 0.30-0.8
Magnesium 0.20-0.8
Chromium 0.20
Zinc 0.40
Titanium 0.10
Aluminum balance
Other Elements (each) 0.05
Other Elements (total) 0.15
* Maximum, unless range is indicated
Mechanical Properties
Mechanical property requirements for strain hardened H12 temper (¼ hard) as specified in ASTM B209 and ASME SB209
Thickness (inch) Yield Strength Min. (ksi)

Tensile Strength (ksi)

Elongation (%)
Min.
Min. Max.  
0.017 – 0.019 15.0 19.0 26.0 1
0.020 – 0.031 15.0 19.0 26.0 1
0.032 – 0.050 15.0 19.0 26.0 2
0.051 – 0.080 15.0 19.0 26.0 3

Mechanical property requirements for strain hardened H14 temper (½ hard) as specified in ASTM B209 and ASME SB209

Thickness (inch) Yield Strength Min. (ksi)

Tensile Strength (ksi)

Elongation (%)
Min.
Min. Max.  
0.017 – 0.019 18.0 22.0 29.0 1
0.020 – 0.031 18.0 22.0 29.0 1
0.032 – 0.050 18.0 22.0 29.0 2
0.051 – 0.080 18.0 22.0 29.0 2
Physical Properties
Physical properties for Alloy 3105
Property 3105 Data
Density, lb/in3 0.0983
Modulus of Elasticity, psi 10.0 x 106
Coefficient of Thermal Expansion, 68-212˚F, /˚F 12.1 x 10-6
Thermal Conductivity, Btu/ft hr ˚F 99
Specific Heat, Btu/lb ˚F 0.214
Electrical Resistivity, Microohm-in 1.504
Standards
Typical standards for Alloy 3105
3105
ASTM B209
ASME SB209

Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein.  © 2014 RMP Inc. All rights reserved.