Metal belt, fixing belt and the heat fixing device

Wear resistance, thermal conductivity, improved heat resistance and flexibility, the fixing belt is provided with a metal belt and the metal belt which can be thinner. By using the fixing belt to heat the fixing device, durability and reliability is high heat fixing device is obtained. The metal belt of the present invention, nickel was prepared by electroforming - of iron alloy, the nickel - F (wt%) content of iron iron alloy, when the content of sulfur and S (mass%), to satisfy the following formula. 0.001 ≦ S ≦ 0.13 85 × S + 3 ≦ F ≦ 350 × S + 3