The invention relates to elastic
tin brass alloy material and a preparation
processing method for the same and belongs to the
nonferrous metal processing field. The elastic
tin brass alloy material is composed of 86-89% of Cu, 0.9-1.1% of Sn, 0.5-1% of Ni, 0.05-0.5% of Co, 0.005-0.01% of Mg and rest of Zn by weight. The preparation
processing method includes that a, preparing materials according to the
mass percent, adding materials,
smelting and
casting; b, hot rolling; c, performing primary cold rolling; d, performing intermediate annealing; e, milling; f, performing secondary cold rolling; g, performing low temperature annealing. The tensile strength sigma b of the
copper alloy is 400 to 900 MPa, the plastic elongation
delta is 5-45%, the
conductivity is 25-32% IACS, and the elasticity modulus is 120 to 125 GPa. The elastic
tin brass alloy material is capable of substituting the existing tin-
phosphor bronze to be broadly used for different fields, such as spring contact pieces, electric contacts,
spot welding poles, relays, electrical contact components and plug-in components.