High carbon hot-rolled steel sheet

Details High carbon hot-rolled steel sheet High carbon hot-rolled steel sheet

2010-06-22

2011-12-06

Le, Emily (Department: 1734)

Alloys or metallic compositions

Ferrous

Two percent or more silicon containing

C420S089000, C420S120000, C420S126000, C420S121000, C420S104000, C420S119000, C420S128000, C148S602000, C148S337000, C148S330000, C148S333000, C148S336000

Reexamination Certificate

active

08071018

ABSTRACT:
A high carbon hot-rolled steel sheet which is a hot-rolled spheroidizing annealed material, including 0.2 to 0.7% C, 2% or less Si, 2% or less Mn, 0.03% or less P, 0.03% or less S, 0.08% or less Sol.Al., and 0.01% or less N, by mass, which contains carbide having a particle size of smaller than 0.5 μm in a content of 15% or less by volume to the total amount of carbide, and the difference between the maximum hardness Hv maxand the minimum hardness Hv min, ΔHv(=Hv max−Hv min), in the sheet thickness direction being 10 or smaller.

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