A mathematical model was developed to simulate the international market for stainless steel in the market economy countries. The model was constructed by analyzing stainless steel markets in four regions: the United States, Japan, Sweden, and the European community. Regional interrelationships between stainless steel supply, demand, prices, and trade are taken into account. Analysis is based on historical data collected for each market covering the 1970-79 period. The data are used to illustrate changes in production technology, capacity, and costs over time and to show consumption of raw materials, energy, and stainless steel products. Demand for stainless steel is calculated for each region annually through 1990. Using forecasts from several macroeconomic services available through 1981, simulation of the international market through 1990 indicates regional annual growth rates of stainless steel demand ranging from 5 percent in the United States to 7.9 percent in Japan, and growth rates of exports ranging from 5.3 percent annually for Sweden to 10.7 percent for Japan.