Iron Golems, as the name implies, are all made of iron. They are the same as regular golems, but their whole body is twice the durability of a regular golem. However, Elaina didn't really care whether they were twice as complicated as a regular golem. They were basically just a walking target, and it was nothing but a big blunder for her.
Jumping from the ground, she quickly made a drawing strike on her sword from the scabbard, rapidly slicing through the golems in her way.
SWISH SWISH SWISH!
Although she did slice them, it only chipped a few of the body parts and did not completely cut them up.
"They are harder indeed...but..."
That first strike that Elaina did was just a way to gauge how strong and durable they were. The strength of her first strike is enough to completely break regular golems. Seeing the golem survive the attack, Elaina has a clear grasp of the power of the golems before her.