heat treatment 16Mnb wheel loader cutting edge 6w2987 Material16Mn steel or Boron steel 30MnBColorsBlack or yellowTechniqueMachining ,Website:http://www.mining-parts.net, heat treatmentSurface HardnessMn HRC280-320HB, Boron HRC440-520HBYielding PointBoron 1440N/mm2Tensile Strength1030 RM-N/mm2,1674 RM-N/mm2CertificationISO9001-9002