Copper Classification

Copper and Copper alloy heat treatment codes

There is wide variation in the physical properties in copper and copper alloys. This is due to the changes in grain structure due to the many processing options available. Even the order of processing can have dramatic effects on the properties of the finished part. Therefore, it is imperitive to know and understand the processing a copper alloy is subjected to during the forming process.

Copper Temper Name	ASTM Code
1/8 Hard	H00
1/4 Hard	H01
1/2 Hard	H02
3/4 Hard	H03
Hard	H04
Extra Hard	H06
Spring	H08
Extra Spring	H10
Special Spring	H12
Ultra Spring	H13
Super Spring	H14
Extruded and Drawn	H50
Pierced and Drawn	H52
Light Drawn, Light Cold Rolled	H55
Drawn General Purpose	H58
Cold Heading and Forming	H60
Rivet	H63
Screw	H64
Bolt	H66
Bending	H70
Hard Drawn	H80
Medium Hard Drawn Electrical Wire	H85
Hard Drawn Electrical Wire	H86
As Finned	H90

As Manufactured Tempers	ASTM Code
As Sand Cast	M01
As Centrifugal Cast	M02
As Plaster Cast	M03
As Pressure Die Cast	M04
As Permanent Mold Cast	M05
As Investment Cast	M06
As Continuous Cast	M07
As Hot Forged and Air Cooled	M10
As Forged and Quenched	M11
As Hot Rolled	M20
As Hot Extruded	M30
As Hot Pierced	M40
As Hot Pierced and Rerolled	M45

Cold Worked and Stress Relieved Tempers	ASTM Code
H01 Temper and Stress Relieved	HR01
H02 Temper and Stress Relieved	HR02
H04 Temper and Stress Relieved	HR04
H08 Temper and Stress Relieved	HR08
H10 Temper and Stress Relieved	HR10
As Finned	HR20
Drawn and Stress Relieved	HR50

Cold Rolled and Order Strengthened Tempers	ASTM Code
H04 Temper and Order Heat Treated	HT04
H08 Temper and Order Heat Treated	HT08

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