alloy
aluminium
aluminum
backdrop
background
bar
black
brushed
brushing
building
chrome
construction
detail
frame
grade
grid
high
industrial
industry
iron
ironworks
material
metal
metallic
modern
panel
pattern
plate
reflective
reinforced
reinforcement
rod
rough
round
rust
rusty
sheet
shine
shiny
silver
stack
steel
strong
structure
texture