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Visual testing at 100% plus magnetic particle testing on load-bearing welds — what each method finds. -
WPS, pWPS and WPQR are three different documents — one question tells you most of what you need about a supplier's welding discipline.
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M21 argon-CO₂ mixed gas behaves differently from straight CO₂ — and the difference shows on the finished part.
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S355JR and Q355B are widely treated as counterparts. They are close — but not the same document.
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