You still need iron to be processed in steelmaking. THIS is where the carbon bottleneck in steelmaking exists because pig iron has a high carbon ratio. H2 helps

You still need iron to be processed in steelmaking. THIS is where the carbon bottleneck in steelmaking exists because pig iron has a high carbon ratio. H2 helps with processing sponge iron which dramatically reduces the carbon ratio within iron ingots used for steelmaking.