What is the difference between sus301 and sus 304?

SUS301 (stainless steel): Cr (chromium) composition is lower than SUS304, corrosion resistance is poor, but the cold interprocessing can get a very high degree of pull plus and hardness, the characteristics of the use of a wide range of good elasticity, so the current Notebook is often widely used in the prevention of EMI, to do the elasticity of the contact part, but the common thickness of 0.4T ~ 0.07T between. Application must be specified level, in order to achieve the design requirements (such as elasticity, strength). And must pay attention to the 301 material has metal crystalline directionality, the higher the number of hard and brittle, if the molding is not careful, easy to cause corner and sidewall cracks.

Material properties

SUS 301 : Suitable for elastic applications, high carbon content, high hardness, not easy to elastic fatigue. Ductility is not good, not easy to stretch. SUS 304 : Not suitable for elastic use, low carbon content, low hardness (soft). SUS 430 : Material contains more impurities (impure), resulting in unstable hardness.

Remarks:

1. If the two hardnesses are close to each other, such as (SUS301 3/4H and SUS304 H) although the hardness is the same, but used in elastic products, SUS 304 H is more likely to produce elastic fatigue.

2. The thickness of the material affects the hardness tolerance (the thicker it is, the greater the tolerance).

SUS 301: surface fog, magnetic than 430 weak, corrosion resistance, elasticity is very good, not easy to fatigue flooding, suitable for cold processing, hardness requirements, hardness and elasticity is proportional to the requirements for shrapnel and strength of the high requirements of the brackets, panels, etc.

SUS 304: non-magnetic, corrosion resistance, elasticity is good, the material does not have a clear filament to the cold machining of the effect of a good, resistant to deep pumping, with a Hardness difference, this material is divided into 2B surface and AB surface, that is, matte surface and mirror surface, used for brackets, connectors and cutlery, etc.