... 45Mn2,ST52,37Mn5 and alloy. 3.Length:1m-9m 4.Life:50000CBM. 5.Name:hardened pip Wear-resisting Concrete ... serving life of it can increase 3~5 times.4.OEM is available from us.Technical Data of Concrete ... 45Mn2)51482.5-335,000-40,000 71483.0-4.040,000-50,000Common1254.51--914810 8,000Pipe4. ... 5+21--914860-652.540,000Layer3+2148350,000Piep (45Mn2)4+3152-1484.550,000Common12541--914860-65 Steel4.5148 Pipe ...