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C40950 Wrought BRASSES Copper-Zinc-Tin Alloys (Tin Brasses) true true https://api.copper.org/alloys.xhtml/C40950
Chemical Composition
Elements
Cu(1) Pb Sn Zn Fe P Ni(2)
(1) Cu + Sum of Named Elements 99.7% min.
(2) Ni value includes Co.
Min (%) 91.5 .30 .01 .30
Max (%) 94.5 .05 .8 Rem .03 .08 .8
Mechanical Properties *
Form Temper Temper Code Tensile Strength
(ksi)		 YS-0.2% Offset
(ksi)		 Elongation
(%)		 Vickers Hardness, 3000 gm Section Size
(in)
* Measured at room temperature, 68°F (20°C).
Strip 1/2 Hard H02 67 Min
73 Typ
80 Max
 64 Min
70 Typ
77 Max		 8 Typ
 160 Typ
 .01
Extra Hard H06 78 Min
84 Typ
91 Max
 75 Min
81 Typ
90 Max		 3 Typ
 180 Typ
 .01
Hard H04 73 Min
78 Typ
86 Max
 70 Min
75 Typ
83 Max		 5 Typ
 170 Typ
 .01
Physical Properties
Melting Point - Liquidus°F 1940
Melting Point - Solidus°F 1904
Densitylb/cu in. at 68°F 0.32
Specific Gravity 8.8
Electrical Resistivity 28
Electrical Conductivity% IACS at 68°F 37
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F 98
Coefficient of Thermal Expansion 68-21210 to -6 power per °F (68 – 212°F) 10
Coefficient of Thermal Expansion 68-39210 to -6 power per °F (68 – 392°F) 10
Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) 10
Modulus of Elasticity in Tensionksi 17400
Modulus of Rigidityksi 6500
Fabrication Properties
Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Fair
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Fair
Spot Weld Fair
Seam Weld Fair
Butt Weld Good
Capacity for Being Cold Worked Excellent
Capacity for Being Hot Formed Excellent
Forgeability Rating 60
Machinability Rating 30
Common Fabrication Processes

No fabrication process properties for this alloy

Thermal Properties
Treatment Minimum*
* Temperature is measured in Fahrenheit.
Annealing 930
Hot Working Temperature 1560
Stress Relief 570
Typical uses
Product Category Product Reason Category Reason
Automotive Connectors, automotive Forming Characteristics Cold Workability
Connectors, automotive Stress Relaxation Stress Relaxation Resistance
Electric & Electronic parts
Applicable Specifications

No applicable specifications for this alloy

Corrosion Properties

No Corrosion Properties Available.