| 摘要 |
An Al-plated steel sheet for exhaust gas passageway members of motorcycles which is produced by dipping a substrate steel sheet which contains by mass C: 0.02% or below, Si: 1% or below, Mn: 1% or below, Cr: 5 to 25%, Ti: 0.3% or below, N: 0.02% or below, and, if necessary, one or more of Ni: 0.6% or below, Nb: 0.1% or below, Al: 0.2% or below, Mo: 3% or below, Cu: 3% or below, W: 3% or below, V: 0.5% or below, Co: 0.5% or below and B: 0.01% or below with the balance consisting of Fe and unavoidable impurities in a molten Al-base plating bath to form a hot-dip plating layer having a mean thickness of 3 to 20μm on the surface of the sheet and which is excellent in red scale resistance.
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