Krishna Engineering Industries

Alloy Name
ASTM C27200
AMW-27 CuZn37
DIN CEN/TS 13388 CW508L
JIS C2720
KEI offers CuZn37 rolled products with high purity and minimum impurities like Iron and Lead to take care of Lead Leaching Test. The Rolled products are in shape Foils, Strips, Sheets and circles/discs to meet our customers’ needs for industrial manufacturing. KEI can provide Coil weight of 8Kg/mm width. This alloy is as per RoHS specification

Thickness Range : 2.5mm to 0.05mm Width Range :8mm to 400mm Surface Roughness: 0.15 to 0.25 Ra Scale Grain Size : Fine i.e. No Orange Peel effect on deep drawing Coil Weight : 8Kgs/mm width.

63/37 Characteristics

CuZn37 is the major brass alloy for the cold forming process. Even though brasses with lower Zinc content have better cold forming properties, CuZn37 is the most used alloy. Reasons for this are on the one hand economical due to lower price of Zinc compared to Copper, on the other hand the forming properties of this alloy meet the demand of many applications

Chemical Composition Weight percentage
Cu 61.50-64.50 %
Pb 0.30Max
Fe 0.075 % Max
Zn Reminder %
Total Impurity 0.60 % Max

Main Applications
Industrial & Automobiles :

Connectors, Deep Drawn Parts, Stamped Parts, Radiator Tanks and Radiator Cores, Automobile Light reflectors, radiator tube.

Electrical :

Components for the electrical industries

Consumers :

Style Jewellery, Snap Buttons, Zippers, eyelet fasteners, Flash Lights.

Physical Properties Typical values in annealed temper at 20 °C

Physical Properties Typical values in annealed temper at 20 °C
Density 8.44 g/cm3
Thermal expansion coefficient -191 .. 16 17.00 10-6/K
Specific heat capacity - 0 .. 300°C 20.2 10-6/K
Thermal conductivity 0.377 J/(g•K)
Electrical conductivity (1 MS/m = 1 m/(O mm²) 121 W/(m•K)
Electrical conductivity (IACS) 15 MS/m %
Thermal coefficient of electrical resistance (0 .. 200 C) 27 10-3/K
Modulus of elasticity ( 1 GPa = 1 kN/mm²) cold formed 99...100 GPA

Mechanical Properties (EN 1652)
Temper Tensile Strength
Yield Strength
A50mm %
O (SOFT) 275 Min 180 40 Min 80 Max
HA(Quater Hard) 335 Min 170 30 Min 75 Min
HB (Half Hard) 380Min 300 15 Min 110 Min
HD (Hard) 450 Min 400 5 Min 135 Min
HE(Extra Hard) 515 Min 450 165 Min
HS(Spring Hard) 660 Min 600 185Min