Fella's
Most of the 'safes' you will find for sale are not, strictly speaking, safes. They are residential secuity containers. The UL residential security container rating is to withstand 5 minutes of attack with hammer and screwdriver. Vulcan is correct in that it is the door that is rated. Unfortunatley, the other 5 sides are, depending on the brand of container, 10 to 16 guage sheet metal. Ten guage is .140" & it gets thinner as the number gets higher. In other words, they are not terribly secure.
By the way, someone mentioned Browning & Fort Knox as being 'top of the line' No, not only no, but hell no. If you want to see a true safe, as in home gun safe, go find a dealer who carries AMSEC. They make price competetive cheeseboxes also, but it is possible to get a safe from them. However, you will pay for it.
There are several smaller custom or regional safe makers who will provide you with a quality product, I don't know them all. What you are looking for though is at least B burglary rating. C is higher, then TL-15, then TL30. TL30 is overkill at 1.5" of steel throughout the safe.
Fire rating in most HSC's is 1200f for 30 min. In the test furnace, when the gas is lit, the timer starts. At 30 min to the sec, the internal transponder is read. Typically the reading will be in the 340 range & rapidly rising. Over 350 is fail point. The gas is shut off, the furnace door opened & a red-hot safe comes out on the trolley. Please do not take my word on the following, check with your fire dept. Most fully involved structure fires will hit between 1600 and 2000 degrees f at some place in the fire at some point in the fire cycle. UL fire rating is 1750 f, for 1 full hour at that temp. In other words, the temp is brought up to 1750, then the timer starts. People, this is a very BIG difference in protection levels.
HSC's will typically use gypsum wall board as the fire insulating medium. If the paper is not on, it will perhaps be called fire rock.
Sheet rock is a good flame barrier, but it simply does not have the mass to be a good heat sink. 1750 safes are usually lined with concrete. In a given size 60" X 28" X 24" a typical weight for an HSC is around 700 lbs in a fire configuration. A 'B' rated fire safe will run around 1200 to 1300 lbs in that size.
Liberty safes advertise having a composite door and they meet the Omega standard. Composite door means sheet metal wrap over a sheet rock core. Omega means they stuck 4 layers of sheet rock in the thing to take up room better spent holding guns.
But, the rating is for about 1550 for 40 min. In any case, a burglar with a 30" tire spoon is going through the door in short order.
Yes, I sell safes. This literally is my business. No I won't sell on somebody else's web site. 900F