GB brand for 0Cr18Ni9.   420 - "class cutting tools," martensitic steel, similar to Brandt's first such high-chromium stainless steel. Also used in surgical tools, can do very bright.   440 - high-strength steel cutting tools, higher carbon content, after appropriate heat treatment can be a higher yield strength and hardness can be achieved 58HRC, are among the most hard stainless steel. The most common example is the application of the "razor blades."   Stainless steel with a hardening of the characteristics of the post-Cold processing will significantly increase the intensity and the use of high-strength alloy steel than the traditional grade steel can reduce the thickness, cost-effective   As a result of high chromium stainless steel, nickel, high temperature resistance when off and still have the strength.   If you wanted,plz contact us.

8.0mm Stainless Steel ball