I see. But when I look at the Romans 9, I see much broader use than just regarding the election of national Israel.
For example:
"One of you will say to me: “Then why does God still blame us? For who is able to resist his will?"
"What if he did this to make the riches of his glory known to the objects of his mercy, whom he prepared in advance for glory— even us, whom he also called, not only from the Jews but also from the Gentiles?"
"Unless the Lord Almighty had left us descendants, we would have become like Sodom"
“I was found by those who did not seek me; I revealed myself to those who did not ask for me."
"What then? What the people of Israel sought so earnestly they did not obtain. The elect among them did, but the others were hardened, as it is written"
- it seems pretty much to be also about salvation to me