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Answeredsurface11/7/2026
Should weld seams on 316L be passivated if they will be painted?
Part of a 316L frame will be painted, the rest stays bare. Do the weld seams under paint still need passivation?
Specific questions from verified professionals, answered by certified experts and peers.
Part of a 316L frame will be painted, the rest stays bare. Do the weld seams under paint still need passivation?
A German customer expects 3-week delivery for cut-to-length 316L sheet from an Asian supplier. Is that realistic, and what should we promise?
We receive 2205 plate and need a quick incoming check before cutting. A full chemical analysis takes days. What can we do in-house?
We are shipping 500 mm 304 circles to a cookware factory. Last shipment had bent edges. What packaging works for circles?
A supplier quotes 'annealed and pickled' 316L plate, another quotes 'hot rolled, annealed'. Is there a meaningful difference in corrosion resistance or mechanical properties?
We are laser welding thin 304 sheet for appliance panels. Some references say argon, some helium mix. What do you use for consistent cosmetic welds?
We received an EN 10204 3.1 certificate that looks right, but the heat number cannot be found on the mill's website. How do buyers actually verify these?
A customer wants to cut cost by using 304L instead of 316L for a urea solution tank at ambient temperature. Is that acceptable from a corrosion standpoint?
We are building a stainless conveyor frame for a dairy plant. The fabricator offers 2B or No.4. Does the finish matter for cleaning and inspection, or is it purely cosmetic?
For site-installed 316L pipework, the contractor wants to use pickling paste on weld seams. Is that acceptable, or should we require electrolytic cleaning?
A European customer references EN 10088-2 for 2B sheet, our mill certificate is to ASTM A480. Are the tolerances interchangeable, or does the PO need both?
A customer wants one 20ft container with coil, cut-to-length sheet and circles. What is the practical way to quote and load it without destroying the margin on processing?
We are welding 6 mm 316L pipe for a food line. Some welders say a purge is unnecessary at this thickness. What does the inspection usually require?
We are specifying stainless handrails for a coastal hotel project (about 500 m from the sea). The contractor proposed 304 with a clear coat. Is that realistic, or should we insist on 316L?
We are preparing our first CBAM report for EU shipments. The mill can give us energy consumption per heat, but not per product. What is the minimum acceptable dataset?