Hi, For design, obviously make sure you are following the applicable code. For example, AWS D1.6 (Structural SS), Table 2.1 provides design criteria for stresses in welds (CJP, PJP, fillet welds and Plug and Slot welds). For example, some of the criteria is based on the lesser of: values for base metal or filler metal (ultimate tensile strength). The A5 filler metal standards do not list yield strength values for any of the stainless fillers, and the A5.9 standard for bare wires and electrodes do not even list UTS values. Usually for say pressure piping or vessels where CJP welds are used, the strength of the weld matches or exceeds the base material so the design is based on code calculations for the base materials being welded. The codes provide allowable stresses that must be considered.
Regards,
Sol