Copper alloy sheet and method for producing same

A copper alloy sheet which has a thickness of 0.05 to 1.0 mm and a mean grain size of 1 to 10 μm and which has a chemical composition consisting of:

• 0.1 to 5 wt % of nickel;
• 0.1 to 5 wt % of tin;
• 0.01 to 0.5 wt % of phosphorus;
• one or more elements which are selected from the group consisting of 3 wt % or less of iron, 5 wt % or less of zinc, 1 wt % or less of magnesium, 0.03 wt % or less of silicon and 2 wt % or less of cobalt;
• and
• the balance being copper and unavoidable impurities,
• said copper alloy sheet having a crystal orientation satisfying 2.9≦(f{220}+f{311}+f{420})/(0.27·f{220}+0.49·f{311}+0.49·f{420}≦4.0, assuming that the degree of orientation of a {hkl} crystal plane measured by the powder X-ray diffraction method on the rolled surface of the copper alloy sheet is f{hkl}.

A copper alloy sheet which has a thickness of 0.05 to 1.0 mm and a mean grain size of 1 to 10 μm and which has a chemical composition consisting of:

• 0.1 to 5 wt % of nickel;
• 0.1 to 5 wt % of tin;
• 0.01 to 0.5 wt % of phosphorus;
• one or more elements which are selected from the group consisting of chromium, boron, zirconium, titanium, manganese and vanadium, the total amount of these elements being 3 wt % or less;
• and
• the balance being copper and unavoidable impurities,
• said copper alloy sheet having a crystal orientation satisfying 2.9≦(f{220}+f{311}+f{420})/(0.27·f{220}+0.49·f{311}+0.49·f{420})≦4.0, assuming that the degree of orientation of a {hkl} crystal plane measured by the powder X-ray diffraction method on the rolled surface of the copper alloy sheet is f{hkl}.

A copper alloy sheet which has a thickness of 0.5 to 1.0 mm and a mean grain size of 1 to 10 μm and which has a chemical composition consisting of:

• 0.1 to 5 wt % of nickel;
• 0.1 to 5 wt % of tin;
• 0.01 to 0.5 wt % of phosphorus;
• one or more elements which are selected from the group consisting of 3 wt % or less of iron, 5 wt % or less of zinc, 1 wt % or less of magnesium, 0.03 wt % or less of silicon and 2 wt % or less of cobalt;
• one or more elements which are selected from the group consisting of chromium, boron, zirconium, titanium, manganese and vanadium, the total amount of these elements being 3 wt % or less;
• and
• the balance being copper and unavoidable impurities,
• said copper alloy sheet having a crystal orientation satisfying 2.9≦(f{220}+f{311}+f{420})/(0.27·f{220}+0.49·f{311}+0.49·f{420})≦4.0, assuming that the degree of orientation of a {hkl} crystal plane measured by the powder X-ray diffraction method on the rolled surface of the copper alloy sheet is f{hkl}.