Assertion: pattern welding | /r/CapableOf | reach level
Facets:
value: by the 6th and 7th centuries
type: TEMPORAL
Source sentences:
text: By the 6th and 7th centuries, pattern welding had reached a level where thin layers of patterned steel were being overlaid onto a soft iron core, making the swords far better as the iron gave them a flexible and springy core that would take any shock from sword blows to stop the blade bending or snapping.