Simplify the following text for a Grade 6 native English-speaking person.
Original: Mild steel has a low carbon content ( up to 0.3 % ) and is therefore neither extremely brittle nor ductile .
Simplified: Low carbon steel contains approximately 0.05 â `` 0.15 % carbon and mild steel contains 0.16 â `` 0.29 % carbon , therefore it is neither brittle nor ductile .