Autoclaved lightweight concrete (ALC) panels are specified by dry density grade B04 (≤425 kg/m³), B05 (≤525 kg/m³) and B06 (≤625 kg/m³) under GB 15762, with the 2026-07-11 made-in-china.com category listing them at US$8.00-35.00 per square metre FOB at a 100 m² minimum order [S3].
Eastland Building Materials Co., Ltd. — Diamond Member since 2007 and an Audited Supplier based in Nanjing, Jiangsu — currently lists AAC/ALC cladding, partition and floor panels across the same price band, with peak and off-season lead time both held within 15 workdays under FOB/CFR/CIF Incoterms and LC or T/T payment [S1][S4].
Density Grade and Panel Thickness — the Two Selection Gates
For non-load-bearing exterior and interior partitions, B05 dry-density ALC in 75 mm and 100 mm thicknesses dominates 2026 export catalogues, including Eastland's "High Strength 75mm Aerated Concrete Interior Panel" listed at the same US$8.00-35.00/m² price band with 100 m² MOQ [S1][S3].
For load-bearing shear walls and floor slabs, B06 grade at 150 mm, 175 mm and 200 mm thickness is the working range, paired with B06 AAC blocks (US$40.00-90.00/m³, 300 m³ MOQ) where masonry infill is also required [S1]. B04 — the lightest grade — is restricted to non-structural cladding over 50 mm thickness where self-weight drives the structural framing cost rather than acoustic or fire performance.
Thermal, Acoustic and Fire Numbers Behind Each Grade
A 100 mm B05 ALC partition delivers a typical thermal conductivity λ of approximately 0.13-0.15 W/(m·K) and a 4-hour fire rating per GB 15762 fire-test protocols, with airborne sound insulation Rw in the 38-44 dB range depending on panel mass and joint treatment [S4].
A 150 mm B06 wall lifts Rw into the 44-50 dB range and pushes fire rating to 4 hours, while a 50 mm B04 cladding panel on a metal curtain wall backup trades acoustic mass for cladding lightness at λ closer to 0.11-0.13 W/(m·K) [S4]. The single largest selection error in 2025-2026 export enquiries has been specifying B04 for partition duty and then retro-fitting steel stud framing to recover acoustic performance that a B05 panel would have delivered at source.
Comparing ALC Against AAC Block, WPC Panel and Glass Curtain Wall
Decision criteria for an external envelope in 2026 reduce to four measurable axes: dry density, λ, unit price and lead time, with the relevant thresholds as follows [S1][S2][S3]:
1. ALC panel B05, 75 mm: λ ≈ 0.13-0.15 W/(m·K), US$8.00-35.00/m², ≤15 workdays. Best for partition and external cladding where AAC block masonry is impractical.<br>2. AAC block B06, 200 mm: λ ≈ 0.16-0.20 W/(m·K), US$40.00-90.00/m³, ≤15 workdays. Best for load-bearing infill where thermal mass and acoustic damping matter more than dry thickness.<br>3. WPC wall panel (George Panel range, 2026): wood-grain surface finish, decorative-only, no fire-rating benefit, lead time negotiable. Best for interior feature walls where wet-trade AAC is overkill [S2].<br>4. Glass curtain wall stick system: λ controlled via insulated glazing unit (IGU), price 8-15× the ALC band, lead time 60-90 days. Best for atria and high-end commercial envelopes where daylight drives the brief.
Where the ALC option is the wrong pick: any façade with a tight 8-12 week site programme and a designer demanding stone, GFRC or terracotta rainscreen — in that case the AAC block substrate still serves, but the cladding trades to metal curtain wall sub-framing rather than to ALC panel cladding, and the panel procurement drops out of the BOQ.
Sourcing and Logistics — 2026 Incoterms, MOQ and Lead Time
Eastland's 2026-08-04 storefront confirms ≤18-hour average response time, OEM/ODM service, and 15-workday lead time across both peak and off-season windows, with LC and T/T accepted under FOB, CFR or CIF — the same envelope carried on the parent company profile [S1][S4].
For an ALC panel buyer, the practical minimum order is 100 m² per SKU (panel size and density grade), versus 300 m³ for AAC block — a ratio that bites first-time importers who order panel-only and then discover the block MOQ is two orders of magnitude higher in cubic metres [S1]. Container loading favours 50 mm, 75 mm and 100 mm thicknesses because the panel face area drives 20'/40' GP utilisation; 200 mm panels crush cube and need re-pricing for the next tier of container.
Installation, Jointing and Common Failure Modes
Three failure modes recur in 2025-2026 project handovers: (1) water ingress at horizontal joints where the thin-bed mortar was not tooled to a concave profile; (2) cracking at openings larger than 1.5 m where the lintel was undersized; (3) tile delamination on bathroom walls where the panel was not primed with an alkali-resistant interface before adhesive fixing. The fix in each case is specification-side, not site-side — i.e. require the lintel schedule, the joint-tooling detail and the primer brand on the submittal before release.
Standards, Compliance and Verifiable Track Signals
The base Chinese standard for load-bearing and non-load-bearing ALC panels is GB 15762, covering dimensional tolerance, dry density classes B04-B06, and 4-hour fire rating at the thicknesses noted above; export to Australia often pairs GB 15762 with AS 5146 for compliance, and the Eastland catalogue explicitly carries "Australia Standard" framing on the AAC cladding panel SKU [S1][S4].
Track signals for a 2026-08-04 procurement cycle: (a) the same US$8.00-35.00/m² FOB band holding for ≥6 months across at least two audited Chinese suppliers, which suggests the B05 75-100 mm commodity is not in shortage; (b) lead time staying at ≤15 workdays into Q4 2026 peak season, which is the read-through for any Q1 2027 hand-over project that has to lock the procurement now.