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[MW:36147] SAW Machine Welding operator Thickness range

By Materials & Welding
Dear All, Could you please advise SAW what is Thickness range Machine Welding Operator? QW-351 — Welders explicitly states that the thickness of weld metal deposited by each welding process shall be considered as the thickness of weld metal when using Table QW-452.1(b). However, QW-360 — Welding Variables for Welding Operators does not contain such a requirement. For Machine Welding, QW-361.2 includes, for example: change in welding process; direct visual control ↔ remote visual control; deletion of automatic arc voltage control; deletion of automatic joint tracking; addition of welding positions; deletion of backing; single pass/side ↔ multiple passes/side. There is no QW-404.30 / thickness limitation specified there. For SAW Welding Operators, Table QW-354 shows: QW-404.30 — t, Weld Deposit as an essential variable for Semiautomatic SAW. However, this does not mean that the operator’s qualified thickness range is determined through QW-452....
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[MW:36148] Guidance for welding Inconel 601 on tube mill for corrugated hose

By Materials & Welding
I have a client who wants corrugated hose in inconel 601 grade . Currently we are able to make in stainless steel . When we do production for inconel 601 corrugated hose , the welding stays consistent for a meter and then it breaks apart . Thickness : 0.2mm Does anyone have experience in welding Inconel 601 grade . What gas do you recommend for the same ? -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . To view this discussion visit https://groups.google.com/d/msgid/materials-welding/e7b3f0a5-c59a-4f38-b2cd-1d05a9c58192n%40googlegroups.com .
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Re: [MW:36150] Guidance for welding Inconel 601 on tube mill for corrugated hose

By Materials & Welding
Hello, For orbital/longitudinal TIG welding of Inconel 601 at this gauge: Primary shielding: pure Argon (99.999%, welding grade) — standard choice for nickel alloys, avoid helium additions for thin gauge (helium increases heat input, which you don't want given your thermal buildup issue). Purge gas (ID of tube): pure Argon , with oxygen content held below roughly 20-50 ppm at the weld zone — nickel alloys need a tighter O2 threshold in the purge than stainless does. If your purge system was set up for stainless (which tolerates more O2), that alone could be your entire problem. Avoid any CO2 or O2 additions (sometimes used to improve arc stability on stainless) — these are not compatible with nickel-based alloys and will cause oxide-related weld degradation. Check that your trailing shield gas flow and coverage length are still adequate at whatever line speed you're running — nickel alloys generally need a longer/better trailing shield than stainless at the s...
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Re: [MW:36146] ASME Section IX – Can a 6G Qualified Welder Weld with Pipe Rotation?

By Materials & Welding
  QW-122 – Pipe Welding Positions.  QW-122 defines the pipe welding positions used for qualification. Purpose of this clause: This paragraph only  defines the welding positions used in qualification. It does not state that a separate  WPS is required for each position . QW-303 – Limits of qualified positions and diameters.  QW-303.1 – Groove welds states that a welder or welding operator who passes a groove weld qualification test is qualified for  the groove weld, fillet weld, and tack weld positions within the limits shown in Table QW-461.9. The important point is that  position qualification belongs to the welder, not to the WPS . QW-461.9 – Performance qualification position limits. This table gives the qualification ranges. For groove welds on pipe: 1G qualifies for the 1G position only   2G qualifies for 2G & 1G ...
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Re: [MW:36134] SS 310 tubes to SS 316L

By Materials & Welding
Refer API RP 582 Regards  Sent from Yahoo Mail for iPhone On Tuesday, August 11, 2026, 2:16 PM, hvala...@gmail.com < hvalaalpesh@gmail.com > wrote: Can anyone suggest suitable filler wires for welding of SS 310 tubes to SS 316L tube sheet?  Does lack of Mo in ER 310 filler wires makes them unsuitable for the use in hydro-carbon service? Can we use ER 309L Mo ? -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . To view this discussion visit https://groups.google.com/d/msgid/materials-welding/2393ab33-b01f-4184-b4a7-75381dce4cban%40googlegroups.com .
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