Aluminum high-pressure die casting on audited B2B platforms in 2026 lists FOB pricing between US$0.10 and US$15.60 per piece at the 100-piece MOQ tier, with Qingdao Rongmaofa Metal publishing an open FOB range of US$0.10–$100 per piece on its Made-in-China storefront [S2].
Aluminium gravity casting, often used as a cost baseline, posts narrower 2026 ranges of US$0.50–$15.00 and US$1.30–$15.60 per 100-piece lot on Made-in-China listings from Qingdao Compass Hardware and Qingdao Hulk Metal Technology [S9]. The spread is wide because unit cost collapses with volume and rises sharply with secondary operations such as CNC machining, impregnation and powder coating [S6].
What "Price Per Piece" Actually Covers
Published piece-prices on industrial sourcing portals bundle raw A380/A383/ADC12 aluminum alloy, cold-chamber die casting on 300–800 ton clamping-force aluminum die casting machine cells, and basic degating, with no surface finish included [S2]. Qingdao Rongmaofa discloses a 1×300 ton and 4×400 ton cold-chamber fleet, the kind of mid-range tonnage used for thin-walled automotive housings and pump bodies [S2].
Die casting die cost, often called tooling or mold cost, is the single largest up-front line item and is amortized into piece-price only after the buyer's volume threshold is reached [S5]. Bian Diecast lists mold design, casting, CNC machining and surface treatment as four separately priced work-streams inside the same one-stop contract, which is why two suppliers quoting the same piece can differ by 2–3× once anodizing or shot blasting is added [S6].
The Four Cost Drivers Buyers Should Track
Alloy selection is driver one. A380/ADC12 (≈8–12% Si, ~1% Fe) is the default low-cost choice and dominates the Made-in-China price tables; higher-purity A356 or 6061 mechanical-grade alloys carry a 10–25% material premium because of tighter Fe/Mg control [S9].
Part size and projected area drive driver two. Soldy, a US aluminum and zinc die caster, sizes machine tonnage to part footprint, and cycle time scales with shot weight and cooling channel design on the die casting die [S5]. A 1500×900×400 mm casting envelope disclosed by A.G.C. Business Consulting sits at the extreme end and is incompatible with the small-format 400 ton cold-chamber cells used for camera or pump parts [S1].
Machining and tolerance is driver three. Rongmaofa's auto water-pump housing requires post-cast CNC machining on dedicated workcells, and Bian Diecast packages CNC as a separate billable line, so tight ±0.05 mm tolerances and threaded features will push per-piece cost 30–80% above as-cast [S2][S6].
Surface treatment and certification is driver four. Soldy, Nebraska Aluminum Castings (NAC) and Bian Diecast all list in-house or partnered powder coat, e-coat, anodizing and impregnation lines that are quoted separately from the base cast price [S4][S5][S6]. Rongmaofa holds IATF TS16949, which auditors price into the unit cost and which is typically required for automotive Tier-1 programs [S2].
How the Main Process Options Compare on Cost
High-pressure die casting (HPDC) is the cheapest route above roughly 1,000 pieces/year because cold-chamber cycle times on a 400 ton die casting machine fall into the 60–180 second band and amortize the steel die across many shots [S1][S2].
Gravity die casting machine (permanent mold) sits in the middle on piece-price — the 2026 Made-in-China gravity listings at US$0.50–$15.60 per 100 pieces are essentially the same headline band as HPDC, but with a lower tooling cost and lower throughput [S9]. Choose gravity for low-to-medium volumes where die-cast porosity would force reject rates above the economic limit.
Sand and lost-wax casting, listed alongside HPDC by A.G.C. Business Consulting, drop out of the per-piece race below 500 pieces/year and are typically used for prototype or very large castings where steel die cost cannot be amortized [S1].
Reading a 2026 Supplier Quote
A representative 2026 quote for a small machined A380 housing at 5,000 pieces/year looks like: tooling US$3,000–$8,000 for a single-cavity steel die, piece-price US$1.50–$4.00 as-cast, plus US$0.80–$2.00 for CNC machining and US$0.30–$0.80 for powder coat, landing near US$3.00–$7.00 landed per piece excluding freight [S2][S5][S6][S9].
Tooling is normally paid in two tranches — 50% on PO and 50% on first-article approval — and is owned by the buyer once paid, which matters if the program is later moved between suppliers [S5]. MOQ is negotiable down to 100 pieces on most Made-in-China listings, but unit price at that tier is roughly 2–4× the 5,000-piece rate because setup labor is not yet amortized [S2][S9].
For a useful cross-process benchmark on volume vs. tooling amortization, see the Injection Molded Part Price 2026: Resin, Tooling and Volume Cost Breakdown guide, which uses the same amortize-the-tool logic against plastic tooling and is the cleanest apples-to-apples comparison outside metal.
Hidden Costs and Failure Modes That Move Total Spend
Porosity is the most expensive recurring failure. Rongmaofa's auto water-pump housing is a sealed fluid part, so any micro-shrink porosity in the casting wall will leak; vacuum-assisted or impregnation processes are then added, and both are line items the original quote rarely shows [S2].
Secondary machining can flip the cost ranking between processes. Bian Diecast's "one-stop" model is structured so that a part with 5 machined features may be cheaper on a slightly more expensive casting process if the cheaper process requires more machining time [S6]. Always ask for a breakdown of cast cost vs. machining cost vs. finish cost rather than a single piece-price number.
For comparison with a related sheet-metal process where tooling and secondary ops scale differently, the Metal Stamping Part Price 2026: Material, Process and MOQ Cost Breakdown article lines up stamping economics against the same MOQ and volume variables used here.
Standards and Sourcing Signals to Watch
Two supplier-side signals dominate 2026 sourcing decisions. First, IATF TS16949 / IATF 16949 certification is the gating credential for automotive Tier-1 programs and is held by Rongmaofa and other audited Diamond Suppliers on Made-in-China [S2]. Second, ISO 9001:2015 audit status is the floor for general industrial buyers; Zhongshan Holy Precision Manufacturing's ISO 9001:2015 audited-supplier badge is the typical pattern on platform listings [S8].
For the equipment side, the global aluminum die casting machine installed base skews to 300–800 ton clamping-force cold-chamber cells for HPDC, with magnesium die casting machine cells reserved for weight-driven programs; buyers running mixed-alloy programs should confirm a supplier can swap alloys without contaminating the melt, since iron-control and Mg-recovery are the practical gating issues [S1][S2].
On equipment selection, the How to Specify a Cold Chamber Die Casting Machine: Locking Force, Shot Weight and Alloy guide translates tonnage and shot weight into the per-shot cost math that underpins every quote on Rongmaofa's published FOB table.
When Aluminum Die Casting Is and Isn't the Right Process
Aluminum HPDC is the right call above 1,000 pieces/year when the part is thin-walled (≥2.0 mm), net-shape or near-net-shape, and the alloy can be a standard Al-Si such as A380 or ADC12 [S1][S2]. It is the wrong call below roughly 200 pieces/year, for parts larger than 1.5 m in any single axis, for any design that requires post-cast T6 heat treatment of safety-critical sections, or where a steel or plastic alternative (sheet metal, Metal Stamping, extrusion, or injection molding) is materially cheaper at the target volume [S1][S6].
Trackable next signal: published 2026 HPDC market reports at the US$4,490 entry price tier on Research and Markets are scheduled to update as the year progresses [S10]. Trackable second signal: per-piece FOB ranges on Made-in-China for both HPDC and gravity castings are refreshed roughly every 30–60 days, so a re-pull in Q4 2026 will show whether the 2026 US$0.10–$15.60 band is widening or compressing as energy and alloy surcharges move.