... :12-60W:900-4800I:3000-2500007MnCrMoVR,07MnNiMoVDRGB19189-2003JIS G3115-2005H:10-50W:900-4800I:3000-2500012MnNiMoVDR,SPV450,SPV4908Low alloy steel plates ... ,Q550,Q620,Q690,Q890,Q800,Q960GB/T16270-200912Wear-resistant steel H:5-150W:900-4800I:3000-2500020MnTiB,N,360,NM400 Bailey ...