GARMCO - ALLOYS

Alternative Designations: AS 3105; BS 3105 (formerly N31); DIN AlMn0.5Mg0.5; EN AW-3105; JIS A3105P; NF A 3105.

Note: Garmco products are routinely produced to AA specifications, but other National Standards may be met on request..

Typical Uses: General sheet metal work requiring greater strength than is provided by 1000 series alloys; profiled building sheet (roofing and siding); flashings and ducting; panels; vehicle and caravan panelling; some holloware; and domestic appliances.

Note: Special grades are available for deep drawing and spinning; general purpose grades should not be used for these operations. 3105 is not suitable for bright anodising. 3105 responds to architectural anodising better than 3003, but not so well as other commonly available alloys. Anodising should therefore be primarily for surface protection.

(B) : Blanked only. Sizes not inside bracket refer to sheared circle sizes available.

Mechanical Properties (To Aluminum Association Standards):

Temper	Gauge Range, mm		Ultimate Tensile Strength MPa			Yield Strength MPa		Elongation in 50 mm, %		Ult Shear Strength, MPa
	Over	Up to	Minimum	Typical	Maximum	Minimum	Typical	Minimum	Typical @ 1.6mm	Typical
O	0.32	0.63	95	115	145	35	55	16		85
	0.63	1.20	95	115	145	35	55	19		85
	1.20	2.00	95	115	145	35	55	20	24	85
H12	0.40	0.50	130	150	180	105	130	1		95
	0.63	3.00	130	150	180	105	130	2		95
	1.20	3.20	130	150	180	105	130	3	7	95
H14	0.32	0.63	150	170	200	125	150	1		105
	0.63	1.20	150	170	200	125	150	2		105
	1.20	2.00	150	170	200	125	150	2	5	105
H16	0.32	0.63	170	195	220	145	170	1		110
	0.63	1.20	170	195	220	145	170	1		110
	1.20	2.00	170	195	220	145	170	2	4	110
H18	0.32	0.63	190	215		165	195	1		115
	0.63	1.20	190	215		165	195	1		115
	1.20	2.00	190	215		165	195	2	3	115
H25	0.32	0.63	160	180		130	160	2		105
	0.63	1.20	160	180		130	160	4		105
	1.20	2.00	160	180		130	160	6	8	105

Note: 1)H2-temper designations indicate that a different process has been used to achieve mechanical characteristics similar to those of the corresponding H1-tempers. However, property limits of H2-tempers differ from the above in that the Maximum Tensile Strength and Minimum Yield Strength provisions do not apply. Where required, material supplied in H2-tempers can be produced to meet the mechanical property limits of the equivalent H1-tempers.

2)Tensile property limits for gauges outside of the indicated range shall be subject to agreement between Garmco and purchaser.

Modulus of Elasticity: 69,000 MPa

Bend Radii: Minimum recommended internal bend radii for 90� cold bends at right angle to the rolling direction.

Thickness

Temper

0.4mm

0.8mm

1.6mm

3.0mm

O

0 t

0 t

0 t

0.5 t

H12, H22

0 t

0 t

0.5 t

1 t

H14, H24

0 t

0.5 t

1 t

1.5 t

H25

0 t

0.5 t

1 t

1.5 t

H16, H26

0.5 t

1 t

1.5 t

2 t

H18

1 t

1.5 t

2 t

3 t

t = Thickness

Welding: 3105 is readily welded by the TIG and MIG processes. Commonly used filler alloys are 4043 and 1100. 4043 gives a greater weld strength, but if the assembly is to be anodized, 1100 filler metal will give a closer color match.

3105 may also be gas welded or resistance welded, but the resulting joints are not as strong or as corrosion resistant as the inert gas welded joints. Moreover, gas welding could result in excessive heat distortion and, in thinner gauges, may burn through. It is essential that all traces of flux used in welding or brazing are removed by scrubbing with hot water upon completion.

Annealing: 345�C � 5�C, until all parts have reached the annealing temperature.

Weight Calculation: Weight per square metre in kilogrammes: 2.71 x thickness in mm.