Sports gear apparatus made from cr-mn-n austenitic stainless steel

Abstract

A Cr—Mn—N austenitic stainless steel, in which moderate manganese (Mn) and nitrogen (N) are essentially substituted for the costly nickel to produce a novel Cr—Mn—N steel, is provided, whereby reducing the cost of materials while maintaining the original physical and mechanical properties. The composition thereof includes by weight: 0.005% to 0.08% carbon, 0.3% to 0.9% silicon, 12.1% to 14.8% manganese, 0.001% to 0.04% phosphorus, 0.001% to 0.03% sulfur, 16% to 19% chromium, 0.001% to <0.82% nickel, 0.2% to 0.45% nitrogen, 0.001% to 0.3% molybdenum, 0.001% to 0.3% copper, 0.001% to 1.0% niobium by weight; 0.001% to 0.5% titanium by weight; and trace elements unavoidable in most manufacturing processes.

1 . A sports gear apparatus made from Cr—Mn—N austenitic stainless steel, the Cr—Mn—N austenitic stainless steel comprising:
 0.005% to 0.08% carbon by weight;   0.3% to 0.9% silicon by weight;   12.1% to 14.8% manganese by weight;   0.001% to 0.04% phosphorus by weight;   0.001% to 0.03% sulfur by weight;   16% to 19% chromium by weight;   0.001% to <0.82% nickel by weight;   0.2% to 0.45% nitrogen by weight;   0.001% to 0.3% molybdenum by weight;   0.001% to 0.3% copper by weight;   0.001% to 1.0% niobium by weight;   0.001% to 0.5% titanium by weight; and   trace elements unavoidable in most manufacturing processes.   
     
     
         2 . The sports gear apparatus made from Cr—Mn—N austenitic stainless steel, the Cr—Mn—N austenitic stainless steel comprising:
 0.048% carbon by weight;   0.73 silicon by weight;   12.67% manganese by weight;   0.023% phosphorus by weight;   0.007% sulfur by weight;   17.11% chromium by weight;   0.39% nickel by weight;   0.35% nitrogen by weight;   0.061% molybdenum by weight;   0.12% copper by weight;   0.34% niobium by weight;   0.21% titanium by weight; and   trace elements unavoidable in most manufacturing processes.   
     
     
         3 . The sports gear apparatus made from Cr—Mn—N austenitic stainless steel, the Cr—Mn—N austenitic stainless steel comprising:
 0.055% carbon by weight;   0.82 silicon by weight;   13.01% manganese by weight;   0.019% phosphorus by weight;   0.005% sulfur by weight;   17.59% chromium by weight;   0.42% nickel by weight;   0.31% nitrogen by weight;   0.043% molybdenum by weight;   0.11% copper by weight;   0.28% niobium by weight;   0.25% titanium by weight; and   trace elements unavoidable in most manufacturing processes.   
     
     
         4 . The sports gear apparatus made from Cr—Mn—N austenitic stainless steel, the Cr—Mn—N austenitic stainless steel comprising:
 0.061% carbon by weight;   0.75 silicon by weight;   13.78% manganese by weight;   0.025% phosphorus by weight;   0.005% sulfur by weight;   16.64% chromium by weight;   0.45% nickel by weight;   0.28% nitrogen by weight;   0.039% molybdenum by weight;   0.13% copper by weight;   0.25% niobium by weight;   0.32% titanium by weight; and   trace elements unavoidable in most manufacturing processes.   
     
     
         5 . The sports gear apparatus made from Cr—Mn—N austenitic stainless steel, the Cr—Mn—N austenitic stainless steel comprising:
 0.072% carbon by weight;   0.79 silicon by weight;   14.55% manganese by weight;   0.018% phosphorus by weight;   0.004% sulfur by weight;   17.02% chromium by weight;   0.48% nickel by weight;   0.42% nitrogen by weight;   0.028% molybdenum by weight;   0.1% copper by weight;   0.51% niobium by weight;   0.45% titanium by weight; and   trace elements unavoidable in most manufacturing processes.   
     
     
         6 . The sports gear apparatus made from Cr—Mn—N austenitic stainless steel, the Cr—Mn—N austenitic stainless steel comprising:
 0.065% carbon by weight;   0.86 silicon by weight;   13.81% manganese by weight;   0.015% phosphorus by weight;   0.009% sulfur by weight;   18.51% chromium by weight;   0.29% nickel by weight;   0.36% nitrogen by weight;   0.045% molybdenum by weight;   0.11% copper by weight;   0.43% niobium by weight;   0.41% titanium by weight; and   trace elements unavoidable in most manufacturing processes.