EN1A / 230M07 Mild Steel. EN1A (also known as BS 970 230M07) is bright mild steel noted for its low carbon content. 20mm EN1A/230MO7 Bright Mild Steel Rod/Bar - Available Lengths 100mm to 600mm. Compared to normal mild steel, bright mild steel provides tighter sectional tolerances, increased straightness, and a much cleaner surface.
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