Extract A Value Using 4 Criteria Inside A Table?

I'm working on a spreadsheet to anticipate the corrosion rates on multiple equipments, based on 4 criterias. At the moment, we type them down one by one and we search for the corresponding value inside the table we have.

Temperature

CS (carbon steel)
%Sulfur
TAN
[< 50-100]
[>100 - 150]
[>150 - 200]
[>200 - 250]

[code]....

These values aren't the real ones, but it looks like that. So, if I have a piece of equipment made of CS, I look at the specific table for CS (There are about 7 different groups of materials). I consider the %Sulfur, TAN# and the specific temperature. You also have to consider that this table is repeated with different outputs for higher level of %sulfur (>0.6, up to about 3%)

EX - Material = CS, %Sulfur = 0.4, TAN# = 0.7, Temp = 152, my value will be 9 (the bold numbers are the outputs). There is no linear relation or any sort of mathematical way to obtain the output, you have to look at the table.

In my mind, this part of my spreadsheet should look just like that :

Material
%Sulfur
TAN#
Temperature
CORR RATE

W
X
Y
Z
= Output

The excel part now, I tried working with IF() to specify a table to use as the TRUE value, trying to group multiple IF statement into one, but searching values inside multiple ranges is very tedious and I cannot cover all the possibilities... Then I tried working with INDEX() and MATCH() but again, these are not exact values, they are ranges, making the work even harder. Building an output with multiple criterias that are simple and exact is easy, I just can't seem to work it out with ranges.