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tting the barrel of a gun.” Anna blinked. “Mixing other metals into the iron block can actually change its properties. I really want to know how these small metal balls are. Together.” Anna and Lucia’s current exploration is a profound work. Roland asked the little girl to decompose the ore into a variety of raw materials, and then Anna mixed them with pure iron according to different mass ratios. After making them into test blocks, they tested their performance through black fire extrusion and stretching, Anna could distinguish Calculate the amount of magic power consumed by each operation to determine its strength and toughness. The first thing to add is obviously carbon. Although Roland knows that steel is essentially an iron-carbon alloy: pig iron with more carbon, pure iron without carbon, can be called steel only if the carbon content is within a certain range, and a slight fluctuation can greatly change the properties of the metal. The first thing to measure is the size of this range. It can be seen from the record that before 1500, it was pure iron and carbon smelting, and after 1500, new elements were added on the basis of steel. Roland knew that for every additional number in the permutation and combination, the possible results would increase exponentially. This was an extremely long process, so he only asked Anna to explore this part of the content when the manufacturing task was not heavy. He encouraged the two witches and sat aside, quietly admiring Anna’s busy back. Although the sun was still bright after the autumn, but no longer the venom of the season and summer, he felt warm all over his body, and a long-lost sense of stability surged into his heart. I don’t know how long it took, and the courtyard gradually became quiet. He suddenly felt a soft hand on his forehead and opened his half-squinted eyes. Lucia was no longer visible, and Anna was sitting in front of him, “You have something to tell me.” “” “You My eyes told me,” she tilted her head, her hair hanging down naturally like strands of tr