There are always customers to ask, which of the stainless steel screws and 8.8 screws is harder and higher. If it is not specialized in producing screws, it may not be clear to this one. But if it is a technician who makes screws, or a person who does screw quality. It may be more clear to them.
Stainless steel handle screw
In general, the hardness of stainless steel screws depends on the hardness of the stainless steel screw wire. With a good stainless steel screw material, the hardness must be stronger, and the difference is weaker. And 8.8 screws, usually purchased with 1018 screw wire, 10B21, and 45 steel screw wire to production, after the cold pier out of the screw, still need to hard treatment. The hardness reaches around HV450-550. If you say that you must compare which of the stainless steel screws and the 8.8-level screws are hard, it is reasonable to say that the 8.8-level screws are relatively harder and have a higher hardness index.