BlueBrass® 42e

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MA42E is aRoHS comliant, lead-free copper alloy with good machinability, high strength, and excellent ductility. Lead content is limited amounts for compliance with a growing range of legislative and regulatory guidelines. MA42E is targeted for electronic applications, however the alloy is recommended for any machined brass part requiring lead-free product.

Mechanical Properties

Round Rod

TEMPER NAME  TEMPER CODE  TENSILE STRENGTH YIELD STRENGTH ELONGATION MILL LIMITS 
range, ksi
(MPa)
range, ksi
(MPa)
range, %
Per client specification, or as needed to replace leaded or other alloy 65 (450) - 109 (750) 29 (200) - 100 (690) 35 - 7 0.0394 - .3150"
(1 - 8mm)

Round Wire

TEMPER NAME  TEMPER CODE  TENSILE STRENGTH YIELD STRENGTH ELONGATION MILL LIMITS 
min, ksi (MPa) min, ksi (MPa)
@ 0.2%
min, %
Per client specification, or as needed to replace leaded or other alloy 65 (450) - 109 (750) 29 (200) - 100 (690) 35 - 7 0.0100 - .2362"
(.25 - 6mm)

Physical Properties

Melting Point (Liquidus) 1650°F 900°C
Annealing Range (min - max) 900 - 1075 °F 480 - 580 °C
Density 0.306 lb/cu in 8.40 gm/cu cm
Electrical Resistivity (Annealed) 41.5 Ω·cir-mil/ft @ 68 °F 6.9 µΩ·cm @ 20 °C
Electrical Conductivity (Annealed) 25% IACS @ 68°F 0.145 MS/cm @ 20°C
Thermal Conductivity 65 Btu/sq ft/ft·hr/°F @ 68 °F 113 W/m·K @ 20 °C
Coefficient of Thermal Expansion 0.0000111°F (68-572°F) 0.0000200°C (20-300°C)
Modulus of Elasticity (Tension) 15,500 ksi 105,000 MPa