What are the main characteristics of stainless steel?

What are the main characteristics of stainless steel?

weldability

Different uses of products have different requirements for welding performance.A kind of tableware generally does not do welding performance requirements, even including part of the pot enterprises.But the vast majority of products need good raw material welding performance, such as second class tableware, thermos cup, steel pipe, water heater, water dispenser and so on.

corrosion resistance

Most stainless steel products require corrosion resistance, like one, second class tableware, kitchen utensils, water heater, water dispenser, etc., some foreign businessmen also do corrosion resistance test: with NACL aqueous solution heating to boiling, after a period of time, Pour out the solution, wash and dry, and weigh the weight loss, to determine the degree of corrosion, (note: product polishing, because of cloth or sandpaper contains Fe composition, can lead to test surface rust)

Polishing performance

Today's society stainless steel products are generally polished  in production, only a few products such as water heater, water dispenser liner do not need to polish.Therefore, this requires that the raw material polishing performance is very good.The main factors affecting the polishing performance are as follows:

1.Raw material surface defect.Such as scratches, point, pickling, etc.

2. Material problem.Hardness is too low, polishing is not easy to throw bright (BQ is not good), and the hardness is too low,During deep drawing the surface is easy to appear orange peel phenomenon, thus affecting BQ .The BQ with high hardness is relatively good.

3. After deep stretched products, the surface of great deformation will also produce small black spots and RIDGING, thus affecting the BQ property.

Heat resistance

Heat resistance refers to the stainless steel can still maintain its excellent physical and mechanical properties at high temperature.

corrosion resistance

When the number of chromium atoms in steel is not less than 12.5%, the electrode potential of steel can change, rising from negative potential to positive electrode potential.Prevent electrochemical corrosion.