DIN 1725-1 Grade 3.3547 H18 – Premium Cold-Worked AlMg4.5Mn Alloy with Superior Corrosion Resistance

The alloy AlMg4,5Mn belongs to the nature-hard aluminum wrought materials, so a strength increase can be achieved only by cold forming, not by a purposeful heat treatment. The material is characterised by good corrosion resistance. It is sea water steady and steady against saline atmosphere. Increasing Mg+Mn content makes the extrusion more difficult, but strength and very low-temperature behaviour improve. The alloy is well weldable. Even in the welding seams strength lie within the range of AlMg5. The alloy AlMg4Mn is standardised as semi-finished material only as sheet metal or strips, thickness: >= 0,35 mm (DIN 1745). Application: rolling shutter and roll gates (sheet metal profiles), in the apparatus engineering for tank bottoms, very low-temperature tanks, heat exchangers and pipings. In the construction of vehicles for superstructures as well as tank and silo trucks, dump truck hollows, buses, bumpers, car body and safety-related parts. In shipbuilding for trunk, superstructures, sail masts and radar equipment

Properties

General

Property	Temperature	Value	Condition	Related Standards
Density		2.66 g/cm³	H18	EN 573-3, EN 1592
	20.0 °C	2.66 g/cm³	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255

Mechanical

Property	Temperature	Value	Condition	Related Standards	Comment
Elastic modulus		71.0 GPa	H18	EN 573-3, EN 1592
	20.0 °C	72.0 GPa	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255
Plane-Strain Fracture Toughnes		22.0 - 35.0 MPa·√m			Typical for Wrought 5000 Series Aluminium
Poisson's ratio		0.33 [-]			Typical for Wrought 5000 Series Aluminium
Shear modulus		26.8 GPa	H18	EN 573-3, EN 1592
	20.0 °C	27.0 GPa	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255
Tensile strength	-196.0 °C	575.0 MPa	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255
		420.0 MPa	H18	EN 573-3, EN 1592
	20.0 °C	445.0 MPa	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255

Thermal

Property	Temperature	Value	Condition	Related Standards	Comment
Coefficient of thermal expansion	-50 °C	2.23e-05 1/K	H18	EN 573-3, EN 1592, DIN 1725-1, EN 573-4, VdTÜV WB 255
	-50.0 °C	2.23e-05 1/K	H18	EN 573-3, EN 1592, DIN 1725-1, EN 573-4, VdTÜV WB 255
	20 °C	2.23e-05 1/K	H18	EN 573-3, EN 1592, DIN 1725-1, EN 573-4, VdTÜV WB 255
	20 °C	2.42e-05 1/K	H18	EN 573-3, EN 1592, DIN 1725-1, EN 573-4, VdTÜV WB 255
	20 °C	2.4999999999999998e-05 1/K	H18	EN 573-3, EN 1592
	20 °C	2.6e-05 1/K	H18	EN 573-3, EN 1592, DIN 1725-1, EN 573-4, VdTÜV WB 255
	100 °C	2.42e-05 1/K	H18	EN 573-3, EN 1592, DIN 1725-1, EN 573-4, VdTÜV WB 255
	100.0 °C	2.42e-05 1/K	H18	EN 573-3, EN 1592, DIN 1725-1, EN 573-4, VdTÜV WB 255
	200 °C	2.4999999999999998e-05 1/K	H18	EN 573-3, EN 1592
	200.0 °C	2.5e-05 1/K	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255
	300 °C	2.6e-05 1/K	H18	EN 573-3, EN 1592, DIN 1725-1, EN 573-4, VdTÜV WB 255
	300.0 °C	2.6e-05 1/K	H18	EN 573-3, EN 1592, DIN 1725-1, EN 573-4, VdTÜV WB 255
Max service temperature		-195.0 - 50.0 °C	H18	DIN 1725-1, EN 573-3, EN 573-4	Long
		150.0 °C			Typical for Wrought 5000 Series Aluminium
Melting point		574.0 - 638.0 °C	H18	EN 573-3, EN 1592
Specific heat capacity		900.0 J/(kg·K)	H18	EN 573-3, EN 1592
	20.0 °C	900.0 J/(kg·K)	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255
Thermal conductivity	20.0 °C	110.0 - 140.0 W/(m·K)	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255, EN 1592

Electrical

Property	Temperature	Value	Condition	Related Standards
Electrical conductivity	20.0 °C	16000000.0 - 19000000.0 S/m	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255, EN 1592
Electrical resistivity		5.26e-08 - 6.25e-08 Ω·m	H18	EN 573-3, EN 1592

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.05 - 0.25 %	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255, EN 1592
Copper	0.1 %	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255, EN 1592
Iron	0.4 %	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255
	0.40 %	H18	EN 573-3, EN 1592
Magnesium	4.0 - 4.9 %	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255, EN 1592
Manganese	0.4 - 1.0 %	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255, EN 1592
Silicon	0.4 %	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255, EN 1592
Titanium	0.15 %	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255, EN 1592
Zinc	0.25 %	H18	DIN 1725-1, EN 573-3, EN 573-4, VdTÜV WB 255, EN 1592

Technological properties

Property
Anodizing	decorative: sufficient, Protective: good
Brazing	hard brazing (with flux/ without flux): poor / poor, friction soldering: acceptable, soft brazing with flux: poor
Corrosion properties	Seawater: very good, weathering: very good
Workability	Bending / Spinning (cold): good / sufficient, Impact extrusion (cold): sufficient, Deep drawing / upsetting (Condition) good (O) / good (O)

EN 573-3 Grade 3.3545 H36 – High‑Strength, Corrosion‑Resistant Aluminum Alloy DIN 3.4144 Alloy – Grade 3.4144 T74: High Strength, Toughness, and Corrosion Resistance for Aerospace

Metal