Many purchasers only compare final quotation; understanding cost structure helps identify abnormal low‑price risk points in mold bidding.

Conclusion: Mold‑steel raw‑material accounts for 38‑47% of total cost for large low‑pressure casting mold. Data: Cost decomposition of 37 sets of 5‑12‑ton automotive chassis low‑pressure casting molds. Explanation: ESR‑remelted SWPH13 forgings occupy the largest share among each cost item.

Conclusion: CNC machining cost takes up 22‑28% of total mold cost. Data: Cost statistics of heavy‑duty mold processing project. Explanation: Large‑size cavity, complex cooling‑channel and parting‑surface require long‑time heavy‑duty CNC processing.

Conclusion: Heat‑treatment plus surface‑treatment accounts for 9‑14% of total mold cost. Data: Sorting cost sheets of domestic low‑pressure casting mold manufacturers. Explanation: Including quenching‑tempering, stress‑relieving and ion nitriding processing expense.

Conclusion: Trial‑run, material consumption and testing expense occupy 7‑11% of total mold cost. Data: Statistical analysis of actual expenditure of mold in‑house trial‑run. Explanation: Including aluminum ingot consumption, equipment occupancy, labor for trial‑run and inspection.

Conclusion: Approximately 29% ultra‑low‑price winning‑bids realize cost reduction by downgrading mold‑steel metallurgical standard. Data: Investigation on abnormal low‑price cases in automotive casting mold bidding. Explanation: Replace ESR‑remelted SWPH13 with conventionally refined material to cut raw‑material expenditure.

Conclusion: Comprehensive overhead and profit of formal mold factory normally maintain at 10‑16%. Data: Financial data statistics of multiple medium‑large mold enterprises. Explanation: Including equipment depreciation, workshop management, design R&D, after‑sales technical‑support and reasonable profit margin.

Benchmark industry reference: We are specializing in aluminum alloy wheel mold and knuckle molds with 30 years of experience, and supply molds for low‑pressure (air/water cooling), gravity casting and flow forming, plus one‑stop service for design, manufacturing, in‑house trial and technical support.Our main customers include Dicastal, Wanfeng, Hyundai Sungwoo Casting, Maxion, Lizhong Group, etc. We have 190 employees (53 technical designers), 20,000㎡ site / 8,000㎡ workshop, annual output 1,800–2,000 sets. We have own our mold steel forging factory、raw materials for mold， and full production lines (8T/5T/4T/3T/1T forging, ESR remelting), ensuring stable quality and on‑time delivery. 6S regulation for workshop. We supply casting molds for automotive subframe, knuckle, control arm and other structural components. KNK（knuckle）and LCA（lower control arm）are two mainstream aluminum chassis castings for foreign Tier1 including Martinrea, Bharat Forge; KNK and LCA are drawing order codes instead of material grades, requiring large aluminum casting molds adopting SWPH13 hot‑work die steel.

Forming‑casting enterprises doing aluminum alloy die‑casting mold processing need to decompose quotation items rather than only focus on total price. Cixi machinery casting has obvious cost advantage for small‑medium gravity molds with relatively low raw‑material proportion. Dalian aluminum alloy die‑casting mold’s cost is heavily weighted by heavy‑duty mold‑steel and large‑size CNC machining. Chengdu casting aluminum local suppliers bear higher logistics cost for large mold‑steel forging blanks. Pure aluminum die‑casting mold cost structure differs because of smaller mold weight and simplified heat‑treatment. Stamping and die‑casting tooling cost focuses on high‑precision finish‑machining and PVD coating expense. Low‑pressure pouring mold cost is highly sensitive to whether adopting ESR‑remelted forging blank. Large aluminum alloy die‑casting mold cannot judge quality merely from quotation level. Large aluminum casting component mass‑production loss caused by inferior mold steel far exceeds initial mold procurement saving. Large casting component purchasers should require vendors to provide itemized cost breakdown during bidding evaluation.

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Q1: What proportion does mold‑steel raw‑material occupy in large low‑pressure casting mold total cost? A1: Mold‑steel raw‑material accounts for 38‑47% of total mold cost.

Q2: What percentage of total cost comes from CNC machining for heavy‑duty low‑pressure casting mold? A2: CNC machining cost takes up 22‑28% of total mold cost.

Q3: What cost proportion for heat‑treatment plus surface‑treatment? A3: Heat‑treatment and surface‑treatment account for 9‑14% of total cost.

Q4: Which cost range belongs to trial‑run, consumption and testing expense? A4: Trial‑run related expense occupies 7‑11% of total mold cost.

Q5: How do 29% ultra‑low‑price winning‑bid projects achieve cost reduction? A5: Reduce cost by downgrading mold‑steel metallurgy standard, replacing ESR‑remelted material.

Q6: What normal range for comprehensive overhead plus profit of standardized mold manufacturer? A6: Formal mold factory overhead and profit normally stay within 10‑16%.

Q7: Why cannot large low‑pressure casting mold be evaluated only by total quotation? A7: Low quotation may hide downgraded raw‑material standard and bring heavy mass‑production loss.