Buying high-purity aluminium: compare 3N2 to 4N
Compare 99.90 to 99.99% aluminium: HUABO grades 3N2 to 4N, remainder in ppm, typical Si/Fe values and practical steps to a purchase specification.
Open guideProcurement · Quality · Engineering
High-purity aluminium knowledge centre
Decision guides for a reviewable specification and defensible supplier comparison. Typical data is clearly separated from agreed limits.
Guides
From a purity target to a reviewable inquiry
Evidence-based guides to purity, quotation, CoA, supplier selection, and refining technologies for procurement, quality, engineering, and research.
High-purity aluminium: compare prices on the same quotation basis
Compare high-purity aluminium quotations by chemistry, quantity, testing, packaging and delivery scope. Includes an RFQ template, without fixed public prices.
Open guideHow to request and review a Certificate of Analysis
Review a high-purity aluminium Certificate of Analysis: batch, Al, Si, Fe, Cu, Mn, Mg, Zn, Ga, method, units, and purchase specification.
Open guideA practical framework for evaluating a high-purity aluminium supplier
Compare high-purity aluminium suppliers by chemistry, batch evidence, capacity, change control, logistics, and RFQ response.
Open guideComparing segregation purification and zone refining
Compare directional solidification, secondary segregation, and zone refining by principle, scale, purity target, and procurement questions.
Open guideHow to interpret trace elements in high-purity aluminium
Interpret Si, Fe, Cu, Mn, Mg, Zn, and Ga in high-purity aluminium data by reviewing element limits, units, methods, and the batch CoA.
Open guideHow to write a reviewable high-purity aluminium specification
Build a reviewable high-purity aluminium specification covering chemistry, form, quantity, testing, CoA, packaging, destination, and acceptance.
Open guideSeparate ingot weight, piece count, total quantity, and MOQ
Separate 8–20 kg individual ingot weight, piece count, trial quantity, total demand, and MOQ when preparing a high-purity aluminium RFQ.
Open guidePlan batch testing and acceptance for high-purity aluminium
Plan high-purity aluminium batch testing by defining batch identity, sampling, test method, units, reporting limits, CoA scope, and acceptance.
Open guidePlan trial quantities for high-purity aluminium supplier qualification
Plan high-purity aluminium trial quantities across sample, qualification lot, pilot trial, and follow-on demand with clear acceptance criteria.
Open guideBilingual capability pack for internal circulation
Four pages covering product basis, typical batch data, RFQ fields, evidence identifiers, and direct contact. Prepared for procurement, quality, and supplier pre-qualification.
Download PDFVerified basis
Publicly documented product basis
4N5 only as a project target for review.
Not a blanket minimum order quantity.
Agree the acceptance specification separately.
No public fixed price or universal lead time.