Navy M Bronze CDA 922 , SAE 622 Steam Bronze , 88-6-2-4
ASTM B 505 , ASTM B 271
Chemical Composition % by weight
Element
Nominal
Minimum
Maximum
Aluminum
-
-
.005
Antimony
-
-
.25
Copper
88
86
90
Iron
-
-
.25
Lead
1.5
1
2
Nickel
-
-
1
Phosphorus
-
-
.05
Silicon
-
-
.005
Sulfur
-
-
.05
Tin
6
5.5
6.5
Zinc
4.5
3
5
Applications
Valves, fittings, pressure containing parts for use up to 550 F.
Mechanical Properties
M07 - As Continuous Cast
Hardness*
Brinell Hardness (500 kg load)
65
Tensile Strength**
KSI
38 min
Yield Strength **
KSI (0.5% Ext. under load)
25 min
Elongation**
% in 2 inch
18 min
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
Thermal Conductivity
BTU/ (sq ft-ft-hr-F)
40.2
Specific Heat
BTU/lb/ºF @ 68F
.09
Thermal Expansion
Per °F from 68 F to 572 F
.000010
Density
lb/cu in @ 68 F
.312
Electrical Conductivity* (Annealed)
% IACS @ 68 F
14.3
Modulus of Elasticity
KSI
14,000
*Volume basis
Fabrication Practices
Stress relieving temperature
500 F or 260 C
Time at temperature
1 hour per inch of section thickness
Responds to heat treatment
No
Machinability rating (Free Cutting Brass=100)
42
Suitability for being joined by:
Soldering/Excellent
Brazing/Excellent*
Oxyacetylene Welding/Fair
Gas Shielded Arc Welding/Fair
Coated Metal Arc Welding/Fair
*Since brazing is performed at temperatures within the hot-short range, strain must be avoided during the brazing and cooling of this alloy.
The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.
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