5.2　Arc Radius

5.2.1　The arc radius of continuous caster can be determined by analogy method or theoretical calculation.The following formula can be used for theoretical calculation:

5.2.2　The basic arc radius of Straight Curved Continuous Casting Machine can be reduced properly，which can be determined according to the deformation ratio of strand in bending and straightening.

5.2.3　When the caster radius is determined by calculation，the solidification and deformation calculation of relevant strand shall be performed，and the calculation result shall meet the following conditions at same time:

1　When strand is in bending or straightening，the surface deformation ratio or deformation speed must be controlled in the allowable range of steel grade.

2　When straightening the strand with liquid core，the comprehensive deformation rate or deformation speed of two-phase area shall be less than the allowable limit requirement of steel grade.