چکیده کلمات کلیدی 1.مقدمه 2. فرمول بندی الگوی عینی واحد 1.2. هزینه سفارش سالانه (AOC) 2.2. هزینه نگهداری سالانه (AHC) 3.2. هزینه خرید سالانه(APC) 4.2. مهمترین محدودیت های این مسئله عبارت اند از: ظرفیت تامین کننده، تقاضای خریدار و کیفیت.
SAE steel grades. The SAE steel grades system is a standard alloy numbering system (SAE J1086 - Numbering Metals and Alloys) for steel grades maintained by SAE International . In the 1930s and 1940s, the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels.
A few percentages this way or that in chromium and nickel. The difference derives from molybdenum. While grade 304 stainless steel only has trace amounts of it, AISI 316 has considerably more. Addition of molybdenum increases corrosion resistance of 316 stainless steel, especially against pitting and crevice corrosion in chloride environments.
Im amerikanischen AISI System (American Iron and Steel Institute) kennt man unter den Nummern 304 und 304L folgende Stähle: 1.4301 – X5CrNI18-10 (AISI 304) 1.4307 – X2CrNiMo13-4 (AISI 304L) 1.4306 – X2CrNi19-11 (AISI 304L) Die Edelstahllegierungen AISI 304 und AISI 304L sind die bekanntesten und am meisten verwendeten Chrom-Nickel …