Calcium Lead Alloy Shielding Sheets 2mm Rolled Pb-Ca Nuclear Cask Lining

Calcium lead alloy shielding sheet is a rolled lead product in which a small and tightly controlled calcium addition is introduced into the melt before casting. Holding calcium between 0.06 and 0.10 percent refines the cast grain structure, suppresses abnormal grain growth during rolling, and gives the finished sheet a noticeably firmer body than commercially pure lead of the same gauge. For buyers lining nuclear waste casks, hot cells or chemical process equipment, that extra dimensional stability is what keeps a two millimetre sheet flat across a 1300 mm width after months of sustained service.

Every bundle is rolled from a certificated Pb-Ca ingot, then continuously rolled, stress relieved and trimmed to length. Calcium lead does not recrystallise at room temperature as quickly as pure lead, so the sheet resists sagging on vertical walls and holds a clean edge when it is slit into narrow strips for cask saddle liners, shielding collars or glove box panels. Each bundle is stamped with a heat number and shipped with a mill certificate recording calcium content, lead purity, tensile strength, elongation and grain size, so the material can be released straight into a nuclear or pharmaceutical quality system without re-testing.

• Controlled Calcium Addition: Calcium is held between 0.06 and 0.10 percent and verified by optical emission spectroscopy on every heat, so hardness and creep resistance stay inside a narrow band from bundle to bundle.
• Grain Refined Structure: The cast structure is refined before rolling, which limits grain growth and produces a uniform fine grain surface that will not open up when the sheet is bent or formed on site.
• Stable Two Millimetre Gauge: Thickness is monitored inline and held to plus or minus 0.1 mm, keeping areal density predictable for shielding calculations and for cask liner fit up.
• Full Heat Traceability: Every bundle carries a heat number linked to a mill certificate listing calcium content, lead purity, tensile strength, elongation and average grain size.
• Cask and Hot Cell Compatibility: The alloy is routinely accepted for spent fuel cask saddles, hot cell liners and glove box shielding because it does not flow under sustained load at ambient temperature.
• Custom Cut Formats: Panels can be supplied as full 1300 x 6000 mm sheets, slit strips from 30 mm wide, or waterjet cut blanks machined to your drawing.

Calcium lead alloy sheet is specified where pure lead would creep or sag under its own weight. Typical installations include spent fuel and isotope transport cask liners, hot cell windows and walls, glove box shielding, radiopharmaceutical production cabinets and chemical plant equipment that needs both acid resistance and gamma attenuation. Because the alloy keeps its shape, it is also used for collimator plates and for shielding inserts that must stay within a few tenths of a millimetre of a designed profile over a ten year service life.

The material welds and burns in the same way as pure lead, so existing installation crews need no new tooling. Where a cask design calls for a bolted liner, the higher tensile strength allows closer bolt spacing and thinner backing plates, which reduces the total weight of the transport package.

Sheets are interleaved with neutral paper, wrapped in polyethylene film and packed in wooden cases or on fumigated export pallets. Each case is stencilled with the heat number, gauge, dimensions and net weight. A mill certificate, packing list and material safety data sheet are issued for every shipment, and third party inspection such as SGS or BV can be arranged on request.

Our quality system follows GB/T 19001-2016 and the plant has held CE certification for radiation protection products since 2016. Thickness, width, flatness and surface condition are inspected on one hundred percent of bundles before packing, and a retained sample from each heat is kept on file for twenty four months so that any claim can be traced back to the original cast.