Steel is of enduring importance in our society. It has enabled technological progress sustaining human civilization over millennia through structural and functional applications, even under the harshest environmental conditions. However, its production requires huge energy input and emits gigantic amounts of greenhouse gases, qualifying it as the main driver of global warming. To tackle the urgent decarbonization challenges in the steel industry, innovative and disruptive technologies must be invented and matured, based on solid understanding of the underlying principles. GreenSteel2022 presents the latest results from basic research, innovative ideas, and disruptive technologies to support the sustainable production of green steel, highlighting the nexus among physical metallurgy, process metallurgy, and the coming hydrogen age. The focus is placed on the basic physical and chemical foundations for improving the sustainability of steel in several areas, including the CO2-lean primary production, low-energy metallurgical synthesis and recycling, and applications of iron and steel for green energy generation and transportation. We cordially welcome you to participate in the workshop and discussion! Please register your participation on our GreenSteel2022 webpage. The registration deadline is the 5th of September.