A691合金管的广泛用途

 A691     11/4crcL22合金管属于合金管系列。合金管（Alloy pipe）是高温高压焊管，其性能要比一般的无缝钢管高很多，因为这种钢管里面含Cr比较多，其耐高温、耐低温、耐腐蚀的性能是其他无缝钢管比不上的，所以合金管在石油、化工、电力、锅炉等行业的用途比较广泛。http://www.huataihaorun.com

A691钢管等级                      钢种                                       ASTM标准              等级

CM-65                     碳钼钢                                                A204/A204M                                 A

 CMS-75                   碳锰钢                                              A299/A299M                                  ...

1/2CR                       1/2%铬 1/2%钼钢                            A387/A387M                                    2

11/4CR                       11/4%铬 11/2%钼钢                     A387/A387M                                    11

21/4CR                        21/4铬    1%钼钢                           A387/A387M                                    22

  ASTM A691  21/4CL4