Originally Posted by
CliffordK
Keep in mind that one of the reasons that chromoly (4130) is popular is that it is relatively tolerant to high weld temperatures, with minimal loss of strength at the welds.
Reynolds 531 is much less tolerant of TIG welding temperatures.
...and the new "air-hardening" alloys like 853 and OX-Platinum are not just more tolerant of TIG welding temperatures, but the welded joints actually gain strength from the welding temperatures.
