- The International Iron and Steel Institute (IISI) was established on 10 July 1967.
- At the beginning, there were 18 founding members from seven European countries plus Australia, Canada, Japan and the US.
- Geographical coverage increases rapidly, with companies from India, Brazil and Argentina joining our membership.
- POSCO (Korea) joined as an associate member.
- China Steel Corporation (Taiwan,1980) and Hyundai - originally Inchon Steel - (Korea,1985) joined as associate members.
- It was a slow decade for recruitment of regular members but a large number of associate and affiliate members joined.
- 1993: Sustainable development policy agreed.
- 1994: Federations in Hungary, Poland, Romania, Czech and Slovak Republics, and Slovenia become members
- 1996: IISI took over the Ultra Light Steel Auto Body (ULSAB) programme.
- 1997: Publication of the first steel industry life cycle inventory (LCI) analysis to ISO standards.
- 2000: Nucor (US) joined as the first electric arc furnace member company.
- 2001: The first Russian steel-producing member joined (Severstal).
- 2002: steeluniversity was launched and the climate change policy agreed.
- 2004: Formal entry of the five largest Chinese producers as members (Baosteel, Anshan, Handan, Shougang, Wuhan), plus CISA (China Iron and Steel Association).
- 2004: The first Sustainability Report was published and the Living Steel programme started; the second major Russian company (Evraz) joined.
- 2006: The safety and health principles were agreed and launched; the Beijing office was opened.
- 2008: IISI changed its name to World Steel Association (worldsteel).
- 2009: Climate Action, a CO2 data collection programme, was initiated.
- 2010: The first Steel Awards, or Steelies, ceremony was held at worldsteel's annual conference.
- 2011: Ian Christmas retired as Director General of worldsteel and was succeeded by Dr Edwin Basson.
- 2014: worldsteel and its members held their first Steel Safety Day on 28 April and committed to make it an annual event.
- 2015: Updated position paper on climate change published.
- 2016: Steel - the permanent material in the circular economy campaign launched.
- 2017: worldsteel celebrates its 50th anniversary.