The ranking table says that out of all the transistors that were produced, the transistors with hFE = 60-100 received the letter A.
The hFE diagram shows that if we take an average transistor (with hFE ≈ 240), then at average current values it has hFE ≈ 240, at a current of 1A hFE ≈ 200, and at a current of 2A hFE ≈ 140.
You can measure hFE of your spesific transistor if you want.
You are right that based on your diagram, the voltage will be 70-80mV. However, another datasheet D882-R Datasheet shows slightly different values - about 180-200 mV.
Although this transistor is not familiar to me, in my opinion, in reality it will be more, about 200-300 mV.