Accurate tests must be made on the strength, toughness, crack resistance, stress state at low temperatures, etc. of steel.

Generally speaking, for example, for materials used in aircraft carriers, the yield strength of deck steel is 90+0Mpa, and the yield strength of the hull is also 780Mpa.

Going all the way down, the smallest destroyer must maintain a strength of at least 400Mpa to ensure maximum safety.

"Currently, the best steel that can be produced by furnaces only has a strength of 620Mpa. This should be limited by the temperature that the supporting facilities of the shelter can provide."

"Or it may be related to other modules!"

Arranged from high to low, the best military steel has a high degree of yield. However, after clicking in to see the specific requirements, Sumo gave up the idea of ​​manufacturing it.

Without him, the resource consumption would be too terrible!

Military steel requires the addition of many strange things. In the furnace, this step is simplified to only providing a sufficient number of basic materials.

But with regard to the quantity of this basic material, after seeing that one unit of 620-strength steel actually required 1,380 units of iron blocks and 880 units of copper blocks, Sumo could only click his tongue and choose to give up.

There is nothing wrong with modern warships using such expensive steel, because the hull steel plates of modern warships are actually not thick, on the contrary, they are very thin. For example, in 052, the thickness of the steel plate is only 30 mm.

What is the concept? The thickness of a one-dollar coin is 25 mm, and the steel plate of a warship is only 5 mm thick.

In modern warfare, the means of attacking warships have begun to become more and more advanced, from the original bombs and torpedoes to the popularity of anti-ship missiles, and the silent hunting of nuclear submarines equipped with large-caliber torpedoes.

In this case, too thick armor will not only fail to protect, but will only hinder combat performance.

But in the wasteland, if you really design such thin armor according to modern thinking and fight a modern war, you are simply courting death.

If nothing else, if there are aliens in the water then, if you take a steel fork, you can probably dig a big hole out easily.

"The steel plate must be thick. Without the weapons equipped by destroyers, thickness is justice. Even if it is a collision, I will hit it hard!"

Currently, there are only about 8,000 units of iron in the shelter. Even if it is temporarily mined, the number will not exceed 30,000.

Calculated based on the length of the destroyer being 40 meters, the required steel, according to Somo's design, would start at at least 2,000 units.

Under this demand, if the unit price is controlled at around 10:1, it will be the best cost-effectiveness.

580? Too expensive, give up!

520? Still too expensive, give up!

Selecting along the way, watching the strength getting lower and lower, even about to break through the psychological limit, it was not until the demand for 440-strength steel popped up that Sumo felt relieved.

For 440Mpa military steel, one unit requires 13 units of iron blocks and 1.5 units of copper blocks.

2000 units, you need 26000 units of iron blocks and 3000 units of copper blocks!

Based on the current reserves in the base, 18,000 units of iron blocks still need to be mined to meet manufacturing needs.

"There is no conflict in plans. If you want to survive the next disaster, the people in Candlelight Shelter must move to Iron Rock Mountain!"

"With high-quality iron pickaxes and storage space for transportation, the digging speed of hundreds of people is not slower than that of machinery, or even faster!"
Chapter completed!