{"id":6668,"date":"2024-09-12T08:19:31","date_gmt":"2024-09-12T08:19:31","guid":{"rendered":"https:\/\/haynesintl.com\/?page_id=6668"},"modified":"2024-09-12T08:19:35","modified_gmt":"2024-09-12T08:19:35","slug":"carburization-nitriding-chloride-salt-resistance-of-high-temperature-alloys","status":"publish","type":"page","link":"https:\/\/haynesintl.com\/en\/carburization-nitriding-chloride-salt-resistance-of-high-temperature-alloys\/","title":{"rendered":"Carburization, Nitriding & Chloride Salt Resistance of High-temperature Alloys"},"content":{"rendered":"\n

Corrosion Resistance in Industrial Heat-Treating Environments<\/h2>\n\n\n\n

Carburization Resistance in Mixed Gases<\/h3>\n\n\n\n

The following test results were generated by exposing alloy coupons in a gas mixture consisting of 5% hydrogen, 5% carbon monoxide, 5% methane, and the balance argon. Exposures were at the temperatures and for the times shown. Carbon absorption values were determined from chemical analyses, performed before and after exposure, and the known specimen surface area. This is a severe test, with conditions representing unit carbon activity and oxygen partial pressures between 10-21<\/sup> and 10-22<\/sup>.<\/p>\n\n\n\n

\n

\n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n Alloy <\/td>\n \n
Carbon Absorption During Exposure (mg\/cm2<\/sup>)\n <\/div> <\/td>\n <\/tr>\n
\n 1600\u00b0F (871\u00b0C) 215 h <\/td>\n \n 1700\u00b0F (927\u00b0C) 215 h <\/td>\n \n 1800\u00b0F (982\u00b0C) 215 h <\/td>\n \n 2000\u00b0F (1093\u00b0C) 215 h <\/td>\n <\/tr>\n
\n 214\u00ae<\/sup> <\/td>\n \n 0.1 <\/td>\n \n 0.3 <\/td>\n \n 0.6 <\/td>\n \n 3.4 <\/td>\n <\/tr>\n
\n 800H <\/td>\n \n 0.5 <\/td>\n \n 1.0 <\/td>\n \n 1.0 <\/td>\n \n 12.6 <\/td>\n <\/tr>\n
\n 556\u00ae<\/sup> <\/td>\n \n 0.4 <\/td>\n \n 1.0 <\/td>\n \n 1.3 <\/td>\n \n 14.0 <\/td>\n <\/tr>\n
\n 6B <\/td>\n \n 0.2 <\/td>\n \n 0.8 <\/td>\n \n 1.5 <\/td>\n \n \u2013 <\/td>\n <\/tr>\n
\n 671 <\/td>\n \n \u2013 <\/td>\n \n \u2013 <\/td>\n \n 1.9 <\/td>\n \n \u2013 <\/td>\n <\/tr>\n
\n S <\/td>\n \n 0.3 <\/td>\n \n 1.6 <\/td>\n \n 2.1 <\/td>\n \n 10.6 <\/td>\n <\/tr>\n
\n 230\u00ae<\/sup> <\/td>\n \n 0.4 <\/td>\n \n 2.0 <\/td>\n \n 2.5 <\/td>\n \n 10.3 <\/td>\n <\/tr>\n
\n X <\/td>\n \n 0.5 <\/td>\n \n 1.8 <\/td>\n \n 2.5 <\/td>\n \n 10.6 <\/td>\n <\/tr>\n
\n 188 <\/td>\n \n 0.5 <\/td>\n \n 1.1 <\/td>\n \n 2.7 <\/td>\n \n 8.6 <\/td>\n <\/tr>\n
\n 600 <\/td>\n \n 0.4 <\/td>\n \n 1.3 <\/td>\n \n 2.8 <\/td>\n \n 9.9 <\/td>\n <\/tr>\n
\n 310 <\/td>\n \n 2.4 <\/td>\n \n 6.4 <\/td>\n \n 3.3 <\/td>\n \n \u2013 <\/td>\n <\/tr>\n
\n 25 <\/td>\n \n 0.1 <\/td>\n \n 0.9 <\/td>\n \n 4.5 <\/td>\n \n 14.4 <\/td>\n <\/tr>\n
\n 601 <\/td>\n \n \u2013 <\/td>\n \n 1.8 <\/td>\n \n 4.8 <\/td>\n \n 11.5 <\/td>\n <\/tr>\n
\n 617 <\/td>\n \n 0.3 <\/td>\n \n 2.4 <\/td>\n \n 5.0 <\/td>\n \n \u2013 <\/td>\n <\/tr>\n
\n 625 <\/td>\n \n 0.3 <\/td>\n \n 1.1 <\/td>\n \n 5.3 <\/td>\n \n 9.9 <\/td>\n <\/tr>\n
\n N <\/td>\n \n 0.1 <\/td>\n \n \u2013 <\/td>\n \n 5.4 <\/td>\n \n \u2013 <\/td>\n <\/tr>\n
\n 150 <\/td>\n \n \u2013 <\/td>\n \n \u2013 <\/td>\n \n 8.1 <\/td>\n \n \u2013 <\/td>\n <\/tr>\n <\/table>\n<\/div>