Research Article

Austenite Grain Growth Kinetics in API X65 and X70 Line-Pipe Steels during Isothermal Heating

Table 2

Grain size ( , m) of X65 and X70 grades with reheating time.

Holding time, sReheating temperature °C
1150°C1200°C1250°C
X65X70X65X70X65X70

60048.3336.1861.3741.5869.3452.03
120055.3940.6270.2645.8878.9057.84
180065.0645.9280.0352.4387.1663.94
270074.452.0188.3556.5995.6967.54
36008256.1295.3162.24 98.5473.93