Membership in MISIF is open to those entities which are engaged in or related to the manufacture of iron and steel products, namely:

Manufacturing companies processing:

• Raw and semi-finished products such as DRI, HBI, billets, blooms
• Rolled product of iron and steel such as bars, wire rods, HR coils and plates
• Wire and wire products
• Flat steel products including :
  - pipes, tubes and fitting
  - galvanised and coated sheets
  - roofing sheets, wall cladding and drums
  - Iron and steel casting, die casting

Non-manufacturing companies associated to the processing of iron and steel products are eligible to become affiliate members.

As an industry organisation, a primary function of MISIF is to assist and support members in carrying out their business efficiently and successfully and among others, the major services are:

1. Representation to government of members' problems and concerns through submission of papers and memoranda, direct meetings and dialogues with the relevant Ministries, departments or agencies;
2. Dissemination of relevant information through circulation of newsletters and brochures, workshop, briefings and seminars.
3. Consultation with members on joint issues requested by Government through survey questionnaires and brainstorming sessions.
4. Business promotion of members products through complimentary listing in the directories and Websites.
5. Parallel membership in the South East Asia Iron and Steel Institute (SEAISI) and ASEAN Iron and Steel Industry Federation (AISIF).
6. Venues for industries sector to meet and deliberate over issues in the industry sector.
7. Technical training activities to support HR development of companies.