Rare-earth elements
Raw material
Re-blot
Recovery
Reductant
Reduction
Reduction smelting
Refining
Refractory brick
Refractory concrete
Refractory industry
Refractory materials
Reinforcing-bar steel
Rejection
Residual stresses
Resistance to scaling
RH-process
Rimmer
Rocking
Rolled metal
Rolling
Rolling skin
Roughness
Runner
Runner 1
Rust-resisting steel