Aluminium ingots for remelting · P1020A and Al99.70 limits, Fe and Si maxima, impurity totals, brand and certificate checks
An aluminium ingot for remelting is a cast block of unalloyed or alloyed aluminium, made by smelters or remelters, that foundries and rolling or extrusion plants melt to make their own alloys and products. Ask three things first: which composition specification the ingot is made and certified to, what the maximum iron, silicon and other impurity levels are, and how each lot is identified and certified.
Primary unalloyed aluminium ingots for remelting (such as P1020A and Al99.70) and remelt alloy ingots for foundries. Extrusion billets, sheet ingots (slabs), aluminium scrap and master alloys are outside this page.
CNFX editorial research · Sources checked October 18, 2026 · 4 sources
The London Metal Exchange's special contract rules for high-grade primary aluminium accept metal conforming to either of two specifications. Specification A is P1020A in the North American and International Registration Record 'International Designations and Chemical Composition Limits for Unalloyed Aluminium' (revised January 2018), with maxima of Si 0.10%, Fe 0.20%, Zn 0.03%, Ga 0.04%, V 0.03%, others each 0.03% and others total 0.10%, aluminium the remainder. [1]
Specification B is GB/T 1196-2017 designation Al99.70, 'Unalloyed Aluminium Ingots for Remelting': Al 99.70% minimum; Si 0.10%, Fe 0.20%, Zn 0.03%, Ga 0.03%, Cu 0.01% and Mg 0.02% maximum; others each 0.03% and total impurities 0.30% maximum. Warrants issued before 1 January 2010 could also conform to an older specification of Si 0.10%, Fe 0.20% and Al 99.70% minimum. [1]
Editorial note: P1020A sets maxima but no aluminium minimum in the LME text, while Al99.70 sets a 99.70% minimum and a 0.30% impurity total; name the exact specification and edition in the order, and for alloy ingots name the alloy designation and its limits.
Give the supplier the specification and edition (for example P1020A or GB/T 1196 Al99.70, or the alloy designation), quantity and lot size, ingot weight and bundling, brand or producer, certificate of analysis per lot, sampling method, packaging and delivery terms.
02
Budget iron, silicon and other impurities
Both LME specifications limit silicon to 0.10% and iron to 0.20%, the largest impurity allowances; Al99.70 additionally caps copper at 0.01% and magnesium at 0.02%. [1]
Editorial calculation: assuming exactly 1,000 kg of ingot and mass fractions at the specified individual maxima, 1,000 × 0.20% = 2.0 kg iron and 1,000 × 0.10% = 1.0 kg silicon. These are separate composition-limit scenarios, not manufacturer-reported or measured batch contents; the full specification, including any total limit, still applies. Use the batch analysis for charge calculations. [1]
Editorial note: ask for the certificate of analysis to report each limited element, not only aluminium content, and check a sample on receipt with your own spectrometer before mixing lots.
03
Compare producer grades above 99.70% against JIS H2102
Indonesian smelter INALUM lists its remelt ingot at 22.7 kg per piece and states that its ingot quality refers to JIS H2102 (virgin aluminium ingot) and JIS H1305 (optical emission spectrochemical analysis). Its grade table sets maxima in % for silicon, iron and copper, for each of titanium and manganese, and for the sum of elements, with the aluminium purity of each grade. [4]
INALUM's text names two purity levels, 99.90% and 99.70%, while its table lists four grades; ask which grades are in current production before writing one into an order. [4]
INALUM’s G1 row permits Si 0.15% and Fe 0.20%; the LME specifications here permit Si 0.10% and Fe 0.20%. Thus a purity label alone does not establish the same composition limits. [4][1] Editorial calculation: assuming exactly 1,000 kg and the individual iron maxima, S1-B at 0.06% gives 0.6 kg iron and P1020A at 0.20% gives 2.0 kg. These are conditional limit-mass calculations, not manufacturer-published or measured batch contents. [4][1]
Rio Tinto's foundry brochure tabulates five Aluminum Association (AA) unalloyed designations with maxima in % by mass: P1020A Si 0.10, Fe 0.20, Zn 0.02, Ga 0.04, V 0.03, others each 0.03, total 0.10; P1015A Fe 0.15; P0610A Si 0.06, Fe 0.10; P0506A Si 0.05, Fe 0.06; P0404A Si 0.04, Fe 0.04, others total 0.03. [3]
The same brochure lists electrical conductor ingot 1350 at 99.60% Al minimum and 1370 at 99.70% Al minimum, with limits on Mn, Cr, Ti and V, and states that Rio Tinto can tailor a specification with regard to trace elements. [3]
EGA’s product-summary table on printed page 7 gives 99.70–99.96% for its super-high/high/standard-purity re-melt group, while the Purity products specification box on printed page 8 gives 99.80–99.96%. These are separate positions in the same booklet, not a single reconciled lower limit. Confirm the applicable offered grade with EGA. That box also lists customisation to the AA-registered designations printed there. [2]
Rio Tinto’s April 2019 table shows P1020A zinc maximum 0.02%; the LME document, citing the January 2018 registration record, shows 0.03%. Both source-specific values are retained here. Confirm the registration edition and contracted composition with the producer/exchange; do not silently substitute one limit for the other. [3][1]
EGA’s printed page 8 lists 22 kg standard purity-product ingots: Jebel Ali 738 × 174 × 112 mm and Al Taweelah 740 × 170 × 114 mm. Its low-profile sow is 680 kg at 1,095 × 1,163 × 298 mm; the page-7 summary also lists a 500 kg high-profile sow and 10, 20 and 22 kg open-mould ingots. Keep the form and source position with each nominal weight. [2]
For foundry alloys EGA lists HDC small ingots of 5, 8 and 10 kg, T-bars from 680 to 1,406 kg and Properzi ingots of 10 kg, packed in bundles for forklift handling. [2]
Rio Tinto lists small form foundry ingot from 8 to 23 kg and T-ingots of 544 to 907 kg, with other T-ingot sizes on inquiry. [3]
Editorial calculation: assuming every piece has exactly the stated nominal mass, no packaging and no mass tolerance, 1,000 kg ÷ 22 kg ≈ 45.45 pieces; buying whole pieces to meet at least 1,000 kg would require 46 pieces, with nominal mass 1,012 kg. For a 680 kg sow, 1,000 ÷ 680 ≈ 1.47 is a mass-equivalent ratio, not a divisible delivery unit or a furnace-charge instruction. These are editorial scenarios, not manufacturer-reported or measured deliveries. Confirm actual piece/bundle masses and charging limits. [2]
State ingot or sow weight, dimensions limit, bundle weight, strapping (steel or plastic) and marking per bundle.
06
Identify the producing smelter behind the ingot offer
A supplier catalogue entry for aluminium ingots identifies an offer, while the certificate must identify the producer, lot and actual composition. Request the full element analysis and the specification edition alongside the producer/brand and bundle markings. The LME rules specify chemistry; acceptance for an exchange contract also requires the applicable brand/contract requirements. [1]
07
Read the composition limits together with the lot identity
1 company lists this product among what they make. Company figures are quoted from each
company's own website; every card states where the relationship came from.
Wan Star Aluminum Industry
TBC
Lists pure aluminium and aluminium-alloy ingots; request the producing smelter, brand, batch analysis and contracted composition with the offer.
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
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Compiled and source-reviewed by the CNFX editorial team.
Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review
· Page last updated 13 October 2026
Buyer questions
What is P1020A aluminium?
High-grade primary aluminium with maxima of Si 0.10%, Fe 0.20%, Zn 0.03%, Ga 0.04% and V 0.03%, accepted by the LME. [1]
What does Al99.70 add over P1020A?
GB/T 1196-2017 Al99.70 sets 99.70% Al minimum, Cu 0.01% and Mg 0.02% maximum, and 0.30% total impurities. [1]
How much iron can a tonne of P1020A contain?
Editorial calculation: assuming exactly 1,000 kg of ingot and iron at the specified 0.20% mass maximum, the iron mass is 2.0 kg. This is a composition-limit scenario, not manufacturer-reported or measured lot composition; use the certificate of analysis for the actual lot. [1]
Which grades are purer than P1020A?
Rio Tinto lists P1015A, P0610A, P0506A and P0404A, with iron maxima falling from 0.15% to 0.04%. [3]
What ingot weights are offered?
EGA lists 22, 20 and 10 kg ingots and 500 and 680 kg sows; Rio Tinto lists 8 to 23 kg small form ingots and 544 to 907 kg T-ingots. [2][3]
What does a 99.90% ingot allow in iron and silicon?
INALUM's S1-B grade at 99.90% aluminium allows Si 0.04%, Fe 0.06% and Cu 0.01% maximum, with a 0.10% maximum sum of elements. [4]
Sources and what still needs a direct check
Sources checked 2026-10-18. The LME document gives the composition limits accepted for its high-grade primary aluminium contract; alloy ingot limits come from their own designations, which were not read for this page.
