heat exchangers

Aluminum materials for heat exchangers

Special features

Materials development based on a rich track record of delivery
Promotion of greater strength and corrosion resistance, and reduced thickness
R&D of various types of brazing sheets

Application to radiator (heater) materials

Tensile strength after brazing

■ Tube materials

High strength (Mn, Cu, Si, Mg added)
High corrosion resistance
(Cu, Ti added, microstructure control)

■ Fin materials

High conductivity (optimized components)
Excellent corrosion resistance (Zn added)

Corrosion resistance increased by 2 times or more

Types & properties

Types of aluminum alloys for piping

Alloy type	Alloy designation			Mechanical properties			Properties
Alloy type	AA*	Alloy	Temper	Tensile strength (N/mm²)	Proof stress (N/mm²)	Elongation (%)	Hollow extrusions	Clad
1000 series	1050	1050	O	90	30	40	✓	-
3000 series	3003	3003	O	115	40	40	✓	-
Sacrificial material clad alloys	-	CT201/9310	O	112	40	40	-	2 outer surface layers
Sacrificial material clad alloys	-	CT209/9311	O	105	37	41	-	3 outer/inner surface layers
Brazing material clad alloys	-	9370	H18	200	190	8	-	2 outer surface layers
Brazing material clad alloys	-	9370	O	110	45	41	-	2 outer surface layers

* AA: The Aluminum Association (U.S.A.)

Clad alloy sacrificial material

Multi-hole hollow shape

Corrosion conditions of bare and clad materials

CASS (tested 4 weeks later)

Clad tube