High-temperature Strength, Creep-resistant Alloys

These alloys developed by our company offer good production characteristics while maintaining excellent high-temperature strength, creep resistance, and heat transfer properties.

Aluminum tubes used in photocopier heat rolls are required to have creep resistance, high-temperature strength, and heat transfer characteristics. Although 5000 series alloys such as A5052 have been used in the past, the CM10 alloy developed by our company offers better creep resistance, high temperature strength, and heat transfer properties than 5000 series alloys. Recently, we have developed a new alloy called CM211 which allows for improved productivity while maintaining the characteristics of CM10.

Features
Mechanical Properties
Creep Characteristics
Creep Characteristics
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Features

Offer better creep resistance, high temperature strength, and heat transfer properties than ordinary 5000 series alloys.
Both CM10 and CM211 can be used for port hole extrusion.

Mechanical Properties

Material	O Temper, Tensile Characteristics at Room Temperature			High-temperature Tensile Characteristics at 200°C
Material	Tensile Strength (MPa)	Resistance (MPa)	Elongation (%)	Tensile Strength (N/mm²)	Resistance (N/mm²)	Elongation (%)
CM211	217	134	27	197	130	20
CM10	223	96	28	164	69	26
A5052	195	90	30	115	75	60
A5056	250	95	35	–	–	–
A6063	90	48	35	55	41	65
A6061	125	55	30	75	55	60

Note 1: Some of the data for 5052, 5056, 6061 and 6063 are from Properties of Aluminum Alloy, published by the Aluminum Association.
High temperature tensile characteristics data for 5052, 5056, 6061 and 6063 based on testing at 205°C.

Creep Characteristics

Conditions
Temperature: 200°C
Stress: 80 MPa
Time: 0 to 200 hours

Material	Rupture Time (h)
CM211-O	> 200 unruptured
CM10-O	> 200 unruptured

Creep Characteristics

Material	Heat Resistance	Heat Conductivity	Porthole Extrusion	Specific Gravity	Young’s Modulus (kN/mm²)	Heat Conduction Rate^*1 (W/(m・K))	Specific Heat (J/Kg・K)
CM211-O	◎	◯	◯	2.73	70.1	163	894
CM10-O	◎	◯	◯	2.73	70.0	157	891
A5052-O	△	△	✕	2.65	69.3	151	892
A5056-O	△	✕	✕	2.61	71.7	134	892
A6063-T6^*2	✕	◎	◎	2.67	68.3	167^*2	896
A6061-T6^*2	✕	◯	◯	2.69	68.3	201^*2	900

Measurement values obtained using laser flash method
Values for 6063 and 6061 (T6 only) are from “Metals Handbook”, ASM, vol.10 (1990)

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