C27200

UNS C27200, often referred to as yellow brass, contains a minimum of 62% copper. CuZn37 is the primary brass alloy used for cold forming processes. While brasses with lower zinc content may offer superior cold forming properties, CuZn37 remains the most widely used alloy for several reasons. Firstly, it is economically advantageous because zinc is less expensive than copper. Secondly, this alloy’s forming properties align with the requirements of many applications, making it a practical choice.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu62.0065.00
Pb0.07
Fe0.07
Total Others0.30
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO ASTM B36 (AS PER TEMPER HO2)
Range (Inch) From To UTS Min (ksi) UTS Max (ksi) PS Min (ksi) Elongation Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia) 0.059 2.953 56 66 60 76
Hex (A/F) 0.118 2.756 56 66 60 76
Square (A/F) 0.118 2.362 56 66 60 76
Range (mm) From To UTS Min (MPa) UTS Max (MPa) PS Min (MPa) Elongation Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia) 1.5 75 385 455 60 76
Hex (A/F) 3 70 385 455 60 76
Square (A/F) 3 60 385 455 60 76
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1680
Density lb/cu in. at 68°F 0.305
Specific Gravity 8.44
Electrical Conductivity % IACS at 68°F 27.6
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 67
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.4
Specific Heat Capacity Btu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tension ksi 15000
Modulus of Rigidity ksi 5600
FABRICATION PROPERTIES
No fabrication properties for this alloy. 

C27200

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