... wall concrete pump elbow 1,PM.Zoomlion,Schwing and so on 2,Materia: GCr15+Q235 3:Life:50000 CBM 4:HRC ... body is processed by hot quenching treatment. Inner wall HRC can reach over 62 degrees. But its outer layer still keeps ... to finish which strengthen qualityIt be suggested to be pumping 25,000 - 30,000 cubic meters and can be used on PUTZMEISTER, SCHWING, etc, boom pumps ...