ACTIVE MEMBERS are those member organizations actively engaged in iron and steel slag processing, refining, and/or the marketing of slag.
ALLIED MEMBERS are member organizations that are actively involved in activities directly connected with the iron and steel slag industry such as manufacturers of equipment and parts, suppliers, and service firms.
ASSOCIATE MEMBERS are member organizations actively involved in reselling of iron and steel slags.
ASSOCIATE CORPORATE MEMBERS are member organizations that act as consultants to the iron and steel slag industry.
ASSOCIATE PROFESSIONAL MEMBERS are educational institutions, research installations, engineers and consultants directly involved with the iron and steel industry.