For stainless steel screws or iron screws, the main problem is to see what the stainless steel screws are, and what is the level of the iron screws. Stainless steel screws have 201, 304, 316. The strength grade of iron screws is 4.8, 8.8, 10.9, 12.9. It is clear that this problem is solved by the problem that the stainless steel screw is hard or the iron screw is hard. But this question is actually very unreasonable. It is not as good as hardness at all. For the hardness, the best way is to test the hardness of the stainless steel screw and the hardness of the iron screw through the hardness tester. The results of the tests are compared.
This depends on what screws are the screws and what screws are the 304 stainless steel screws. For low-strength stainless steel screws, such as bolts lower than 4.8, the 304 stainless steel screws have good hardness. For bolts higher than 5.8 to 8.8. For non-high-strength 304 screws, the hardness of the iron screws is high. For the high-strength 304 screws, the hardness of the 304 screws is high. For the screws of class 8.8 and above, the hardness of the iron screws is high.