ASTM B446 / B446M UNS C70400

Chemical Properties

Copper
incl Silver 		Nickel incl
Cobalt 		Lead,
max 		Iron Zinc,
max 		Manganese Sulfur,
max 		Phosphorus,
max
remainder 4.8 to 6.2 0.05 1.3 to 1.7 1.0 0.30 to 0.8 0.02 0.02

Mechanical Properties

Standard
Temper 		Former
Temper 		Tensile Strength,
min, ksi (MPa) 		Yield Strength,A
min,
ksi (MPa) 		RockwellB
Hardness
30 T
O60 Soft annealC 37 (255) 12 (85) 45 max
H55 Light drawn 40 (275) 30 (205) 41 to 65
H80 Hard drawn 45 (310) 35 (240) 60 min
Note A: At 0.5 % extension under load.
Note B: Rockwell hardness values shall apply only to tube or pipe having a wall thickness of 0.020 in. [0.5 mm] or over and an outside diameter of 5/16 in. [8 mm] or over. For all other tube no Rockwell hardness values shall apply. Rockwell hardness tests shall be made on the inside surface of the tube. When suitable equipment is not available for determining the specified Rockwell hardness, other Rockwell scales and values may be specified subject to agreement between the manufacturer and the purchaser.
Note C: Although no minimum grain size is specified, the product must nevertheless have fully recrystallized grain structure.

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