12459 CF415K
Thread Content
Since the pipe fitting material grade CF415K ensures successful impact testing at 20°C, can CF415K only be used in conditions above 20 degrees Celsius?
Therefore, when selecting a design, one should choose Sa. .
However, those who formulated this standard actually wrote it in such a way as to relax their own requirements. There is absolutely no need for it. . . . Those steels ensure impact resistance at 0°C; there should be no major issues with them. CF415K: the raw materials used include steel pipes of GB/T6479 standard, grade 20#, with impact resistance at 0°C; steel pipes of GB/T9948 standard, grade 20#, with impact resistance at normal temperature (20°C); steel plates of GB/T713 standard, grade Q245R, with impact resistance at 0°C; forgings of NB/T47008 standard, grade 20#, with impact resistance at 0°C
This 20°C is to be close to the US standard. If it is said that the CF415K cannot be used in conditions below 20°C, then that is actually too strict
This 20°C is to be close to the US standard. If it is said that the CF415K cannot be used in conditions below 20°C, then that is actually too strict