The grain size is measured to be above ASTM grade 11.0 for low temperature coiled Ti-IF steel as well as Ti-Nb-IF steel containing higher carbon content or to be about ASTM grade 10.5 for high temperature coiled Ti-IF steel, respectively.

 
  • 热轧低温卷取Ti-IF钢和碳含量较高的Ti-Nb-IF试验钢的铁素体晶粒度在11.;0级以上;热轧高温卷取Ti-IF钢在10
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