Wheel head

 Wheel head

Main Material
Ductile iron castings:
       China: GB 1348-88: QT400 - QT600
       United States: ASTM 536: 60-40-18 - 80-55-06
       India: SG400-600
Gray iron castings:
      China: GB9439-88: HT200 - HT350
      United States: ASTM 48M: 200 - 350
      India: FG200-350
Casting:
      China: GB11352-89: ZG20 - ZG50
      United States: ASTM27: G60-30 - G90-60
Wear-resistant alloy steel castings:
      ZG42SiMn2Re, ZG42Si2MnCr2MoRe
Manganese steel castings:
      China: GB/T5680-1998: ZGMn13-3, ZGMn13-4, ZGMn13-5
      United States: ASTM 128: A - F