Mangalloy
（重定向自Hadfield steel）
![Label on a bicycle frame indicating mangalloy](/Images/godic/202501/16/Mangalloy_steel_frame1152.jpg")
![World War I Brodie helmet, made from Hadfield steel](/Images/godic/202501/16/M1917helmet1154.jpg")
Mangalloy, also called manganese steel or Hadfield steel, is a steel alloy containing an average of around 13% manganese. Mangalloy is known for its high impact strength and resistance to abrasion once in its work-hardened state.