Cartridge Brass (70/30)

70.0 Cu | 30.0 Zn | 30 Relative Machinability | "S" Weight Factor - 11.61

Physical Properties:

Composition (Percent) Copper 70, Zinc 30
Nearest Applicable ASTM Specifications B135, B587
Melting Point (Liquidus) 1750 F
Density .207 lb / cu in. @ 68 F
Specific Gravity 8.53
Cold Working Capacity Excellent
Hot Forming Capacity Fair
Hot Forgeability Rating n/a (Forging Brass = 100)
Hot Working Temperature 1350 - 1550 F or 725 - 850 C
Annealing Temperature 800 - 1400 F or 425 - 750 C
Machinability Rating n/a (Free Cutting Brass = 100)

Mechanical Properties for 1.00 OD x .065 Wall Tubing:

Temper Tensile Strength Yield Strength * Elongation in 2 in. Rockwell Hardness (F) Rockwell Hardness (B) Rockwell Hardness (30T) Shear Strength
.050 mm 47.0 ksi 15.0 ksi 65% 64 --- 26 ---
.025 mm 52.0 ksi 20.0 ksi 55% 75 --- 40 ---
Hard Drawn 78.0 ksi 64 ksi 8 ksi --- 82 73 ---

* (.5% Ext. under Load)

Drawn - General Purpose (H58)Temper is used for general purpose tube only, usually where there is no real requirement for high strength or hardness on the one hand or for bending qualities on the other.

Hard Drawn (H80)Temper is used only where there is need for a tube as hard or as strong as is commercially feasible for the size in question.

Light Drawn - Bending (H55)Temper is used only where a tube of some stiffness, but yet capable of readily being bent (or otherwise moderately cold worked) is needed.

Typical Uses: grill work, radiator and heater cored and tanks, flashlight shells, lamp fixtures, reflectors, screw shells, socket shells, pump and power cylinders and liners, ammunition components, plumbing accessories, plumbing brass good, pins, rivets, screws, springs.

NOTE: The values listed above represent reasonable approximations suitable for general engineering use. They should not be used for specification purposed. See applicable A.S.T.M specification references.

Special arrangement can be made to provide alloys not shown.