ASTM A572直缝钢管力学性能和化学成分(仅限于SAWL直缝钢管)
ASTM A572直缝钢管力学性能
ASTM A572 GR.42
屈服强度≥290MPa,抗拉强度≥415MPa,标距8英寸伸长率≥20%
ASTM A572 GR.50
屈服强度≥345MPa,抗拉强度≥450MPa,标距8英寸伸长率≥18%
ASTM A572 GR.55
屈服强度≥380MPa,抗拉强度≥485MPa,标距8英寸伸长率≥17%
ASTM A572 GR.60
屈服强度≥415MPa,抗拉强度≥520MPa,标距8英寸伸长率≥16%
ASTM A572 GR.65
屈服强度≥450MPa,抗拉强度≥550MPa,标距8英寸伸长率≥15%