Regarding below mail, the chemical composition you sent is TIS standard.
However, as specified in drawing and WPS/PQR, the material that we use in this project are JIS G3101 SS400 and JIS G3106 SM400 class B.
In this case, we’d suggest you to generate WPS/PQR for P1 Gr. 1 or 2 to JIS G3106 SM400 class B.
And WPS/PQR for JIS G3106 SM400 class B to JIS G3106 SM400 class B (for rafter joining).