Clad material
A clad material ( 30 ) includes a first layer ( 31 ) made of stainless steel, a second layer ( 32 ) made of Cu or a Cu alloy and roll-bonded to the first layer, and a third layer ( 33 ) made of stainless steel and roll-bonded to a side of the second layer opposite to the first layer. The clad material has an overall thickness of 1 mm or less, and in a cross-sectional view along a stacking direction, a minimum thickness of the first layer in the stacking direction and a minimum thickness of the third layer in the stacking direction are 70% or more and less than 100% of an average thickness of the first layer in the stacking direction and an average thickness of the third layer in the stacking direction, respectively.
1. A clad material comprising:
a first layer made of stainless steel;
a second layer made of Cu or a Cu alloy and roll-bonded to the first layer; and
a third layer made of stainless steel and roll-bonded to a side of the second layer opposite to the first layer; wherein
the clad material has an overall thickness of 1 mm or less; and
in a cross-sectional view along a stacking direction, a minimum thickness of the first layer in the stacking direction and a minimum thickness of the third layer in the stacking direction are 70% or more and less than 100% of an average thickness of the first layer in the stacking direction and an average thickness of the third layer in the stacking direction, respectively, the elongation of the clad material is 8% or more; and
a grain size of the second layer is 0.150 mm or less.
2. The clad material according to claim 1 , wherein a standard deviation of the minimum thickness of the first layer with respect to a thickness of the clad material and a standard deviation of the minimum thickness of the third layer with respect to the thickness of the clad material are 1.5% or less.
3. The clad material according to claim 1 , wherein the first layer and the third layer are both made of austenitic stainless steel.