DIN 1712‑3 Grade 3.0257 H12 – Premium Aluminium Alloy for High‑Performance Electrical Applications

Pure aluminium Electrical conductivity alloy according to DIN, ensured by the German electrotechnical commission for electro-technology with, also in accordance to DIN 40 501 part of 1 to part of 4. This material has a very good electrical and good thermal conductivity, however only relatively low mechanical strength. Forming capacity and chemical as well as weather proofness are very good. Application: Roll bond, z-bond, wiring loom-change with particularly high requirements.

Properties

General

Property	Temperature	Value	Condition	Related Standards	Shape
Density		2.7 g/cm³	H12	EN 573-3, EN 755
	20.0 °C	2.7 g/cm³	H12	DIN 1712-3, EN 573-3, EN 573-4	Sheet, Strip

Mechanical

Property	Temperature	Value	Condition	Related Standards	Shape	Comment
Elastic modulus		70.0 GPa	H12	EN 573-3, EN 755
Elongation		15.0 %	H12	EN 573-3, EN 755		A50
		15.0 %	H12	EN 573-3, EN 755		A100
	20.0 °C	6.0 %	H12	DIN 1712-3, EN 573-3, EN 573-4	Sheet, Strip	A10
	20.0 °C	9.0 %	H12	DIN 1712-3, EN 573-3, EN 573-4	Sheet, Strip
Hardness, Brinell		25.0 [-]	H12	EN 573-3, EN 755
	20.0 °C	25.0 - 35.0 [-]	H12	DIN 1712-3, EN 573-3, EN 573-4	Sheet, Strip
Plane-Strain Fracture Toughnes		22.0 - 35.0 MPa·√m				Typical for Wrought 1000 Series Aluminium
Poisson's ratio		0.33 [-]				Typical for Wrought 1000 Series Aluminium
Shear modulus	20.0 °C	25.0 - 26.5 GPa	H12	DIN 1712-3, EN 573-3, EN 573-4	Sheet, Strip
Tensile strength		80.0 MPa	H12	EN 573-3, EN 755
	20.0 °C	90.0 - 130.0 MPa	H12	DIN 1712-3, EN 573-3, EN 573-4	Sheet, Strip

Thermal

Property	Temperature	Value	Condition	Related Standards	Shape
Coefficient of thermal expansion	20 °C	2.35e-05 1/K	H12	EN 573-3, EN 755
	100 °C	2.35e-05 1/K	H12	EN 573-3, EN 755
Melting point		658.0 °C	H12	EN 573-3, EN 755
Specific heat capacity	20.0 °C	921.0 J/(kg·K)	H12	DIN 1712-3, EN 573-3, EN 573-4	Sheet, Strip
Thermal conductivity		230 W/(m·K)	H12	EN 573-3, EN 755
	20.0 °C	230.0 W/(m·K)	H12	DIN 1712-3, EN 573-3, EN 573-4	Sheet, Strip

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	34500000.0 - 35500000.0 S/m	H12	EN 573-3, EN 755
Electrical resistivity	2.82e-08 - 2.9e-08 Ω·m	H12	EN 573-3, EN 755

Chemical properties

Property	Value	Condition	Related Standards	Shape
Aluminium	99.5 %	H12	EN 573-3, EN 755
Copper	0.02 %	H12	DIN 1712-3, EN 573-3, EN 573-4, EN 755	Sheet, Strip
Iron	0.4 %	H12	DIN 1712-3, EN 573-3, EN 573-4	Sheet, Strip
	0.40 %	H12	EN 573-3, EN 755
Magnesium	0.05 %	H12	DIN 1712-3, EN 573-3, EN 573-4, EN 755	Sheet, Strip
Silicon	0.25 %	H12	DIN 1712-3, EN 573-3, EN 573-4, EN 755	Sheet, Strip
Zinc	0.05 %	H12	DIN 1712-3, EN 573-3, EN 573-4, EN 755	Sheet, Strip

Technological properties

Property
Brazing	Excellent
Workability	Excellent workability.

Property

Brazing

Excellent

Workability

Excellent workability.

EN 10216-3 Grade P355NH: Normalized/Normalized Formed (+N) High-Temperature Weldable Steel High-Conductivity DIN 1712-3 Grade 3.0257 H18 Aluminium Alloy – Optimal for Wiring Loops

Metal