Cookware with copper bonded layer

A method of making multi-layer, bonded cookware, the method comprising:

• providing at least one stainless steel layer and at least one copper layer in a stacked blank assembly;
• and
• applying heat and pressure to the stacked blank assembly for a predetermined period of time such that at least one stainless steel layer is metallurgically bonded to the at least one copper layer via solid state bonding to form a bonded blank assembly,
• wherein the at least one stainless steel layer is a ferritic stainless steel layer, and
• wherein the at least one copper layer is a copper alloy having controlled grain growth properties.

A method of making multi-layer, bonded cookware, the method comprising:

• stacking a plurality of metal layers in a stacked blank assembly, the plurality of metal layers comprising:
• an upper layer of stainless steel;
• an intermediate layer of copper;
• and
• a lower layer of stainless steel;
• and
• applying heat and pressure to the stacked blank assembly for a predetermined period of time such that the plurality of metal layers are metallurgically bonded via solid state bonding to form a bonded blank assembly,
• wherein the upper layer and the lower layer are formed from a ferritic stainless steel, and
• wherein the intermediate layer is formed from a copper alloy having controlled grain growth properties.

A method of making multi-layer, bonded cookware, the method comprising:

• stacking a plurality of metal layers in a stacked blank assembly, the plurality of metal layers comprising:
• a first layer of stainless steel;
• a first layer of copper;
• a second layer of stainless steel;
• a second layer of copper;
• and
• a third layer of stainless steel;
• and
• applying heat and pressure to the stacked blank assembly for a predetermined period of time such that the plurality of metal layers are metallurgically bonded via solid state bonding to form a bonded blank assembly,
• wherein the first, second, and third layers of stainless steel are formed from a ferritic stainless steel, and
• wherein the first and second layers of copper are formed from a copper alloy having controlled grain growth properties.