Originally Posted by
fietsbob
Might be a Milld [Hi-Ten] steel Fork on that old Raleigh.
You're confused, thicker steel tubing resists flex better than thinner and it makes no difference cromo vs 1020. Cromo can be thinner because it has higher Youngs Modulas of Elasticity and is less likely the fracture due to thickness.
Bottom line, 1020 fork flexes less than cromo because it's thicker. Cromo fork is not better than 1020 in forks used with SA drum brakes, it's worse....