Final answer:
Chemical analysis is not a nondestructive testing method for steel castings and forgings. It does not evaluate material integrity but composition, unlike radiography, magnetic particle testing, and ultrasonic testing.
Step-by-step explanation:
The nondestructive testing method among the options provided that cannot be used for steel castings and forgings is D) chemical analysis. Nondestructive testing methods such as radiography, magnetic particle testing, and ultrasonic testing are commonly used to evaluate the integrity of materials without causing damage. These methods can detect defects like cracks or voids. Chemical analysis, on the other hand, does not provide information on structural integrity but rather the composition of the material.