Patent ID: 6146475
Filing Date: 2000-11-14
Classification: C21D,C22C

Abstract:
A martensitic stainless steel alloy having a unique combination of form tool machinability, hardness capability, and corrosion resistance, said alloy consisting essentially of, in weight percent, about wt. %  Carbon 0.06-0.10 Manganese 0.50 max. Silicon 0.40 max. Phosphorus 0.060 max. Sulfur 0.15-0.55 Chromium 12.00-12.60 Nickel 0.25 max. Molybdenum 0.10 max. Copper 0.50 max. Aluminum 0.02 max. Nitrogen 0.04 max.  and the balance is essentially iron, wherein the elements are balanced such the % Chromium Equivalent is not greater than about 9.5%, where% Chrornium Equivalent=% Cr+% Si+1.5.times.% Mo+10.times.% Al-% Ni-% Cu-30(% C+% N).