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Nickel-plated steel sheets, which constitute battery cases and numerous other items, are likely to seize the plated layers and dies during press working. When hard Ni–W alloys with excellent abrasion resistance1,2) are coated onto Ni-plated steel sheets, steel sheet seizure is unlikely, and excellent consecutive press formability can be achieved. Annealing increases the hardness of the deposited Ni–W alloys, but the hardening mechanism is not clearly understood.3–8) Previously, we investigated the effect of annealing on the structure and hardness of deposited Ni–W alloys, and reported that the hardness increased regardless of alloy composition and the degree of increase particularly enhanced at W contents above 40 mass%.9) Moreover, the alloy composition that significantly changed the hardness also changed the structure of the deposits.9) To simplify the system, we previously deposited Ni–W alloys directly onto steel sheets without an initial Ni plating, and investigated the hardness and texture of the products. As the second step, the initial Ni plating was performed on steel sheets in the present study, and subsequently, we deposit the Ni–W alloys. The Effect of Initial Ni Plating on the Structure and Hardness of Electrodeposited Ni–W Alloys with and without Annealing