What is the better iron screw and the stainless steel screw?

Iron screw and stainless steel screw, can not say which is better, this is actually depends on the customer’s use scene. Shi Shi Tong usually advises customers what kind of material to choose according to the scene where the screw is used by the customer.

In terms of screw anticorrosion, stainless steel screws are, of course, much better than iron screw. However, iron screws can improve rust prevention and anticorrosion performance through surface treatment, different surface treatment methods can withstand different salt spray test time, depending on the customer’s salt spray requirements to choose which material and which surface treatment.

In terms of mechanical properties, the strength grade of unhardened iron screw and stainless steel screw is the same, both of which are 4.8. However, stainless steel can not be hardened, iron screws can be done according to the needs of customers, can be increased to 6.8, 8.8, 10.9 or even 12.9 by heat treatment, and so on, can meet the requirements of tension, breaking, toughness and other more demanding places, more widely used.

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