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There are fire-proof safes that pack sufficient insulation to keep the interior temperature well below 451°F (the spontaneous ignition point for paper).
These are to preserve important papers for future use, not for archival storage.
Would you put your collection in the oven at, say, 300 degrees? The paper may not burst into flames, but the plastic mounts would melt, the wax paper would bleed onto what is next to it. the gum...would change.
If you stored extra cash in the safe, you could turn it into the bank for new bills. You could pull out contracts and use them in court. But you would not be proud of those stamps in your album.
Most fireproof safes keep the contents safe by adding humidity, as others have pointed out. But even more than that, you want air circulation. You need to flip through your albums from time to time. Locked tight in an airtight room is not a good storage option unless you have it climate controlled.
Keep the temperature below 75 degrees Fahrenheit (F). Keep the relative humidity (rH) below 65% to prevent mold growth and reduce insect activity. Avoid very low relative humidity because relative humidity below 15% can cause brittleness.