Some tested to stainless steel should applied in order can guarantee the product quality. The test that usually apply to stainless steel product such as tensile strength, hardness test, corrosion test and many other kind of test that can be different, depend on the purpose to use the steel. Stainless Steel Industry may stay in each country, and stainless steel supplier also can be from many country. The main raw material of stainless steel industry is use iron. The iron itself may don't available in the country so raw material should be imported from other country. This make the price of steel and stainless steel can be expensive.