EN AW-1050A — EngMats

Description

EN AW-1050A per EN 573-2. 99.5% minimum Al. Highest corrosion resistance, formability, electrical conductivity and weldability of all aluminium alloys. Low strength (Rm~80-120 MPa) limits structural use. Used for chemical equipment liners, food processing, electrical bus bars and decorative sheet.

Key Properties — Annealed (O)

Rm (Tensile Strength)

60 – 95

MPa

Re / Rp0.2 (Yield)

MPa

A₅ (Elongation)

≥ 25.0

Hardness

20 – 30

E (Young's Modulus)

GPa

Density

2.71

g/cm³

Main Designations (9)

Standard Body	Designation	Country / Region	Note
EN	EN AW-1050A / Al99.5	EU
AA	1050A	USA
ASTM	B209 Alloy 1050	USA
DIN	Al99.5	Germany
JIS	A1050	Japan
GOST	A5 (A5)	Russia
UNS	A91050	USA (UNS)
GB	1050A	China
JUS	Al99.5	Yugoslavia	Čisti aluminij za el. vodove i hemijsku opremu

Standards (9)

#	Standard Body	Designation	Country / Region	Note
1	EN	EN AW-1050A / Al99.5	EU	—
2	AA	1050A	USA	—
3	ASTM	B209 Alloy 1050	USA	—
4	DIN	Al99.5	Germany	—
5	JIS	A1050	Japan	—
6	GOST	A5 (A5)	Russia	—
7	UNS	A91050	USA (UNS)	—
8	GB	1050A	China	—
9	JUS	Al99.5	Yugoslavia	Čisti aluminij za el. vodove i hemijsku opremu

All values in wt.%

Aluminium

~99.6500

Silicon

≤ 0.2500

Iron

≤ 0.4000

Copper

≤ 0.0500

Manganese

≤ 0.0500

Zinc

≤ 0.0700

Element	Symbol	Min %	Max %	Typical %
Aluminium	Al	99.5000	—	99.6500
Silicon	Si	—	0.2500	0.1000
Iron	Fe	—	0.4000	0.2200
Copper	Cu	—	0.0500	0.0200
Manganese	Mn	—	0.0500	0.0100
Zinc	Zn	—	0.0700	0.0200

Mechanical Properties

Condition	Code	Rm min MPa	Rm max MPa	Re min MPa	Re max MPa	A₅ min %	Z %	KV J	HB min	HB max	HRC min	HRC max	E GPa
Annealed (O)	+O	60	95	20	—	25.0	—	—	20	30	—	—	69.0
Half Hard (H14)	H14	100	140	85	—	8.0	—	—	30	40	—	—	69.0
Hard (H18)	H18	130	170	120	—	4.0	—	—	38	48	—	—	69.0

Physical Properties

Density

2.710

g/cm³

Melting Point

646–657

°C

Young's Modulus

69.0

GPa

Poisson's Ratio

0.330

—

Thermal Conductivity

229.0

W/m·K

Thermal Expansion

23.60

×10⁻⁶ /K

Specific Heat

900

J/kg·K

Electrical Resistivity

0.0276

µΩ·m

Magnetic

Heat Treatment

Annealing (O)

Temperature:200°C – 300°C

Medium:Furnace

Duration:1-3 h

Cooling:Air or water cool

Hardness After:HB 20-30

Full softening for maximum formability.

Stress Relief

Temperature:150°C – 200°C

Medium:Air oven

Duration:1-2 h

Cooling:Air cool

Hardness After:Minimal

After cold forming.

Machinability

Machinability Rating

relative to AISI B1112 = 100%

650.0%

Excellent

Turning Speed (HSS)

500

m/min

Turning Speed (Carbide)

1,900

m/min

Feed Rate (Turning)

0.700

mm/rev

Drilling Speed (HSS)

450

m/min

Milling Speed (Carbide)

1,950

m/min

Coolant	Dry or light MQL; flood acceptable
Chip Formation	Very long ductile stringy chips — gummy; difficult chip control
Tool Material	Sharp carbide K10; PCD for production
Surface Finish	Ra 0.8-6.3 um — limited by chip control

Poor machinability — extremely ductile gummy chips. Primary manufacture by extrusion, rolling, drawing. Machining secondary. PCD tooling for production turning.

Applications

Electrical

Overhead power line conductors (AAAC — all-aluminium alloy conductor), electrical bus bars.

Packaging

Food foil, pharmaceutical blister pack foil and beverage can lids.

Reflectors

Lighting reflectors, solar concentrators and decorative reflective surfaces.

Chemical

Chemical plant linings, tanks for nitric acid and organic chemicals.

Technical Notes

💧

Corrosion Resistance

Outstanding atmospheric and freshwater corrosion resistance — better than all aluminium alloys due to purity. Attacked by strong alkalis (NaOH) and strong HCl. Perfect for nitric acid, acetic acid and most organic chemicals.

✅

Electrical Conductivity

1050A at 61% IACS is the standard for high-conductivity overhead lines (vs copper at 100%). Weight saving vs copper is 3.3x for same current carrying capacity — dominant overhead line material worldwide.