ALUMOLD-350^®

Reference specification: IS 5648

Brief description

Alumold-350® has been specifically developed to achieve the best combination of strength at low and high temperatures, together with a good shape stability and machinability. Alumold-350® is particularly suitable for plastic forming machinery operating at temperatures up to 200°C, which is the temperature for moulding of rubber and other elastomers.

Chemical composition

Alumold-350® is based on alloy of the 2000 series.

Physical properties (nominal values)

Specific weight	2.84 g/cm3
Elastic modulus	72400 MPa
Lin. thermal expansion coefficient (20°-100°C)	22.3 10-6 K-1
Thermal conductivity (Temper T851)	130 W/mK
Electrical conductivity (Temper T851, 20°C)	18 MS/m

Processing methods

Weldability

TIG/MIG filler alloy	possible AA 2319
by resistance	good

Surface treatments

Anodizing without aesthetic aspect purposes	moderate
Anodizing technical	not suited
Polishing	excellent
Hard chroming	good
Nickel plating	good
Texturing	good

Machinability

• excellent

Availability

Alumold-350® is delivered in temper T851 (quenched – stretched – artificially aged) for thicknesses up to 203.2mm, then in temper T852 (quenched – cold compressed – artificially aged) for thicknesses up to 304.8 mm.

Thickness (over ... to)	Max.width
	T851	T852
7.9 - 25.0 mm	2020 mm
25.0 - 123.0 mm	2020 mm
123.0 - 148.0 mm	1520 mm
148.0 - 203.2 mm	1020 mm	1520 mm
203.2 - 304.8 mm		1520 mm

(other dimensions on request)

Mechanical strength

Min. tensile properties (Tempers T851/T852)

Thickness (over... to)	Rm [MPa]	Rp0.2 [MPa]	A50 [%]
7.9- 50.8 mm	428	317	7
50.8 - 76.2 mm	428	310	6
76.2 - 101.6 mm	414	304	5
101.6 - 127 mm	407	297	5
127.0 - 152.4 mm	393	290	4
152.4 - 203.2 mm	380	280	2
203.2 - 254.0 mm	355	270	1
254.0 - 305.0 mm	320	240	0.5

Typical strength for various thicknesses

Thickness (over... to)	Rm [MPa]	Rp0.2 [MPa]	A50 [%]	HB
7.9 - 50.8 mm	465	366	9	145
50.8 - 76.2 mm	465	366	9	145
76.2 - 101.6 mm	465	366	8	145
101.6 - 127.0 mm	460	365	7	140
127.0 - 152.4 mm	455	360	60	135
152.4 - 203.2 mm	420	330	4	125
203.2 - 254.0 mm	390	315	3	120
254.0 - 305.0 mm	360	310	2	110

Tolerances

Plate thickness (over... to...)	Temper	Thickness tolerance	Flatness long.	Flatness transv.
7.9 - 60 mm	T851	+ 1.8 / - 0 mm	0.2%	0.2%
60 - 80 mm	T851	+ 2.2 / - 0 mm	0.2%	0.2%
80 - 100 mm	T851	+ 3.0 / - 0 mm	0.2%	0.2%
100 - 203.2 mm	T851	+ 3.5 / - 0 mm	0.2%	0.2%
152 - 305 mm	T852	+ 6.0 / - 0 mm	0.4%	0.2%