Steel companies from around the world have been providing data for the wordsteel Sustainability Indicators since 2004.

These indicators provide a systematic way of measuring key aspects of our economic, environmental and social performance on a yearly basis.

In 2021, 94 steel companies and associations contributed to the data collection. The companies who reported on one or more indicators for fiscal year 2020 produced 1,008.4 Mt of crude steel, representing 53.7% of global crude steel production.

Access to the worldsteel data collection platform is open exclusively to worldsteel member companies.

Environmental performance UNIT 2018 2019 2020
1 CO2 emissions Tonnes CO2/tonne crude steel cast 1.81 1.85 1.89
2 Energy Intensity GJ/tonne crude steel cast 19.51 20.06 20.62
3 Material efficiency % of materials converted to products & co-products 96.33 96.49 97.86
4 Environmental management systems (EMS) % of employees & contractors working in EMS-registered production facilities 97.07 97.16 96.11
Social performance 2018 2019 2020
5 Lost time injury frequency rate Injuries/million hours worked 0.84 0.83 0.85
6 Employee training Training days/employee 6.48 6.90 7.18
Economic performance 2018 2019 2020
7 Investment in new processes and products % of revenue 6.12 7.09 8.03
8 Economic Value Distributed % of revenue 94.18 98.27 97.75

The latest data was published in November 2021

Membership data collection commences in June and is reported in the same year.

The average indicator results, participation by indicator, as well as performance trends are provided below.

Indicators 2011 – 2020 (10-year trends)


Environmental sustainability indicators

Note relating to indicator 1: The increase in emissions can be explained by the increase in the share of BOF steel production in global steel production as well as the changes in companies providing data

Notes relating to indicators 1 & 2: Indicators 1 and 2 are calculated using route-specific energy and CO2 intensity for the basic oxygen furnace and electric arc furnace steel production routes. The CO2 intensity includes scopes 1,2 and 3 according to the GHG protocol. The indicators are also weighted based on the production share of each route. Indicator 1 includes CO2 emissions only as these make up approximately 93% of all steel industry greenhouse gas emissions.

Social sustainability indicators

Notes relating to indicator 5: Lost time injury frequency rate includes fatalities and is calculated based on figures including contractors and employees.

Economic sustainability indicators


Indicator 7: Investment in new processes and products includes capital expenditure and R&D investment.


Indicator 8: Data collection for Economic Value Distributed started in 2007.