The cost of aluminum alloy die casting per kilogram is not a fixed figure—it ranges from as low as ¥1.5/kg for simple standard parts to over ¥120/kg for highly complex precision components. This 80-fold difference stems from a mix of technical, производство, and demand-related factors. For manufacturers and buyers alike, understanding what drives these costs is critical to budgeting, Переговоры о цитатах, and avoiding hidden expenses. But what exactly makes up the per-kilogram cost? How do factors like equipment size or surface treatment affect the price? And how can you get an accurate estimate for your specific project? This article answers these questions with detailed data, industry benchmarks, and practical guidance.
1. Breakdown of Aluminum Alloy Die Casting Cost per Kilogram
To understand the final price, we first need to unpack its core components. The table below details each part of the per-kilogram cost, its typical proportion, and calculation logic:
| Cost Component | Typical Proportion (Total per kg Cost) | Ключевые детали & Calculation Basis | Отраслевые тесты (Алюминиевые сплавы) |
| Raw Material Cost | 40–60% | (Aluminum alloy price + waste loss rate × alloy price) × part density- Waste loss rate: 8–15% (higher for complex parts with thin walls)- Common alloy prices: ADC12 (~¥22/kg), 6061 (~¥28/kg) | ADC12-based parts: ¥9–¥15/kg; 6061-based parts: ¥12–¥20/kg |
| Processing Cost | 20–35% | (Equipment hourly operation cost + labor cost) ÷ hourly output- Стоимость оборудования: Includes depreciation (8–10-year lifespan) и энергия (300-ton machine uses ~50kWh/hour)- Стоимость труда: Depends on automation (fully automated lines need 1–2 workers/line) | Маленькие машины (<300 тонны): ¥3–¥8/kg; large machines (>800 тонны): ¥10–¥25/kg |
| Surface Treatment Cost | 5–20% | Billed by area or weight; varies by process complexity- Simple processes (natural oxidation): Near-zero cost- Complex processes (микродуговое оксидирование): Higher premium | Sandblasting anodizing: ¥2–¥5/kg; plating/spraying: ¥8–¥15/kg |
| Mold Amortization Cost | 5–15% | (Mold manufacturing cost + maintenance cost) ÷ total production quantity- Жизнь пресс-формы: 50,000–100,000 shots (ADC12 molds)- Стоимость плесени: Simple molds (~¥5,000); complex molds (~¥50,000+) | Маленькие партии (<10k parts): ¥5–¥20/kg; большие партии (>100k parts): ¥1–¥3/kg |
2. Key Factors Influencing Cost per Kilogram: Quantitative Analysis
Several factors directly push the per-kilogram cost up or down. Below is a detailed breakdown of the most impactful ones, with data on how much they can shift prices:
А. Equipment Tonnage (Sets the Processing Cost Benchmark)
The size of the die-casting machine determines the base processing cost—larger machines have higher depreciation and energy expenses.
| Machine Tonnage | Suitable Part Types | Processing Cost per kg | Key Reason for Cost Difference |
| <300 тонны | Small electronic parts (НАПРИМЕР., Светодиодные радиаторы, корпуса разъемов) | ¥3–¥8 | Низкое использование энергии (~30kWh/hour); high hourly output (100–200kg/hour) |
| 300–800 tons | Автовальные детали (НАПРИМЕР., Королевки передачи, Сенсорные кронштейны) | ¥8–¥15 | Medium energy use (~50kWh/hour); balanced output (50–100kg/hour) |
| >800 тонны | Large structural parts (НАПРИМЕР., EV battery pack housings, блоки двигателя) | ¥15–¥25 | High energy use (~80kWh/hour); low output (20–50kg/hour); specialized maintenance |
Беременный. Part Structural Complexity (Multiplies Processing Costs)
Complex designs require more time, труд, and specialized tools—each adding to the per-kilogram cost.
| Complexity Level | Design Features | Cost Multiplier (против. Simple Parts) | Пример части & Стоимость за кг |
| Простой | Flat plates, no holes/undercuts; single parting line | 1.0х | Basic brackets: ¥1.5–¥5 |
| Середина | Sliders/cores (1–3), маленькие дыры, simple threads | 1.5–3.0x | Auto sensor housings: ¥30–¥60 |
| Высокий | Multi-core linkage (>3), глубокие дыры (<3мм диаметр), тонкие стены (<2мм), high-precision tolerances (± 0,05 мм) | 3.0–8.0x | Drone mounts, средние рамки телефона: ¥60–¥120+ |
В. Surface Treatment Requirements (Adds Value & Расходы)
Surface treatments enhance aesthetics or performance but increase costs—some processes double the per-kilogram price.
| Поверхностная обработка | Цель | Стоимость за кг (Добавлен) | Подходящие приложения |
| Natural Oxidation | Basic corrosion resistance; no extra finish | ¥0–¥0.5 | Внутренние структурные части (no visibility requirements) |
| Sandblasting Anodizing | Матовая отделка; improved scratch resistance | ¥2–¥5 | Visible auto parts (НАПРИМЕР., приборная панель), потребительская электроника |
| Микродуговое оксидирование | Military-grade corrosion/heat resistance | ¥10–¥20 | Высокопроизводительные детали (НАПРИМЕР., Корпуса электродвигателей, аэрокосмические компоненты) |
| Покрытие (Chrome/Nickel) | Shiny finish; устойчивость к износу | ¥8–¥15 | Декоративные детали (НАПРИМЕР., luxury car emblems, high-end appliance handles) |
Дюймовый. Заказать объем (Drives Economies of Scale)
Large batches spread fixed costs (like mold manufacturing) across more kilograms—lowering the per-unit cost significantly.
| Заказать объем | Влияние стоимости (за кг) | Причина | Пример: Auto Transmission Housing (Base Cost ¥12/kg) |
| <10,000 куски (Небольшая партия) | +¥5–¥20 | High mold amortization (¥50,000 mold ÷ 10,000 pieces = ¥5/piece); startup losses | ¥17–¥32/kg |
| 10,000–100,000 pieces (Средняя партия) | +¥1–¥5 | Balanced mold amortization; optimized production rhythm | ¥13–¥17/kg |
| >100,000 куски (Большая партия) | +¥0.5–¥1 | Low mold amortization; bulk material discounts; Высокая эффективность | ¥12.5–¥13/kg |
3. Typical Application Scenarios: Cost per Kilogram Examples
Real-world costs vary by industry and part function. The table below shows common use cases with detailed cost breakdowns:
| Промышленность | Part Name | Key Design/Process Features | Стоимость за кг (Общий) | Стоимость разбивки (за кг) |
| Освещение | LED Heat Sink | Thin-walled fins (2мм); no surface treatment; 200-ton machine | ¥18–¥25 | Материал: ¥10–¥12; Обработка: ¥6–¥8; Mold Amortization: ¥2–¥5 |
| Автомобиль | Transmission Housing | Multi-layer oil channels; 500-ton machine; sandblasting anodizing | ¥45–¥60 | Материал: ¥15–¥20; Обработка: ¥15–¥20; Поверхностная обработка: ¥10–¥15; Mold Amortization: ¥5–¥10 |
| Потребительская электроника | Phone Middle Frame | Тонкие стены (1.5мм); nano injection molding; mirror polishing | ¥80–¥120 | Материал: ¥20–¥30; Обработка: ¥40–¥60; Поверхностная обработка: ¥15–¥25; Mold Amortization: ¥5–¥10 |
| Аэрокосмическая | Drone Mount | Высокая сила 6061 сплав; пустого дизайна; микродуговое оксидирование | ¥55–¥70 | Материал: ¥25–¥30; Обработка: ¥20–¥25; Поверхностная обработка: ¥10–¥15; Mold Amortization: ¥0.5–¥2 (большая партия) |
4. How to Get an Accurate Quote & Reduce Costs
To avoid overpaying and ensure transparency, follow these practical steps:
А. Prepare Information for Quotes
Manufacturers need 4 key details to provide an accurate per-kilogram cost:
- 3D Drawings: Mark tolerances (НАПРИМЕР., ± 0,1 мм), толщина стен, and critical features (отверстия, нить).
- Material Specification: Specify alloy grade (НАПРИМЕР., ADC12, 6061) and any material certifications (НАПРИМЕР., Rohs, IATF 16949).
- Годовой объем: Estimated yearly production (НАПРИМЕР., 50,000 куски) to calculate mold amortization.
- Surface Treatment Code: Reference standards (НАПРИМЕР., Anodize Type II, Iso 10074) to avoid ambiguity.
Беременный. Cost Reduction Strategies
Cut costs without sacrificing quality using these 3 методы:
- Simplify Design: Reduce the number of sliders/cores (НАПРИМЕР., merge two holes into one); increase wall thickness to ≥2mm (lowers processing difficulty).
- Leverage Integration: Merge multiple small parts into one integrated die-cast component (reduces assembly and mold costs—e.g., замена 3 brackets with 1 saves ¥5–¥10/kg).
- Accept Minor Imperfections: For non-visible parts, skip expensive polishing; allow minor burrs (avoids ¥2–¥5/kg in manual sanding costs).
В. Avoid Low-Price Traps
Quotes below market averages (НАПРИМЕР., <¥1.5/kg for simple parts) often hide shortcuts that cost more later:
- Материальная резка: Using recycled aluminum with high impurity content (reduces part strength by 20–30%).
- Process Skipping: Omitting heat treatment (lowers tensile strength; risks part failure under load).
- Low-Quality Release Agents: Leaving residues that cause corrosion or adhesion issues.
5. Yigu Technology’s Perspective on Aluminum Alloy Die Casting per Kilogram
В Yigu Technology, we believe transparent cost breakdowns are key to building trust with clients. Для автомобильных клиентов, our 300–800-ton machine fleet delivers auto parts at ¥8–¥15/kg—balancing quality (IATF 16949 проверенный) и стоимость. For consumer electronics clients, our modular mold designs cut mold amortization by 30%, lowering the per-kilogram cost of phone frames to ¥80–¥100 (против. industry averages of ¥100–¥120).
We’re optimizing two areas to reduce costs further: 1) АИ-управляемый управление процессом (cuts scrap rates by 15%, lowering material waste costs); 2) Closed-loop recycling (повторно использует 95% of aluminum scrap, reducing raw material costs by ¥2–¥3/kg). Our goal is to help clients get high-quality aluminum die cast parts at competitive per-kilogram prices—no hidden fees, no compromises on performance.
Часто задаваемые вопросы
- Why does the same part have different per-kilogram costs from different manufacturers?
Costs vary due to 3 factors: 1) Equipment efficiency (newer machines have lower energy use, reducing processing costs); 2) Качество материала (premium alloys cost more but last longer); 3) Automation level (fully automated lines have lower labor costs than semi-automated ones). Always ask for a detailed cost breakdown to compare apples to apples.
- Can I reduce mold amortization costs for small-batch orders (<10,000 куски)?
Yes—use shared molds (split mold costs with other clients for similar parts) or short-life molds (simplified designs that cost ¥1,000–¥5,000 vs. ¥50,000+ for standard molds). Например, a shared mold for LED heat sinks can cut amortization from ¥5/kg to ¥1–¥2/kg for small batches.
- How much does changing the alloy grade affect the per-kilogram cost?
Alloy choice impacts material costs significantly: ADC12 (¥22/kg) is 20–30% cheaper than 6061 (¥28/kg). For non-load-bearing parts (НАПРИМЕР., скобки), ADC12 is ideal. Для высоких частей (НАПРИМЕР., drone mounts), 6061 is worth the extra ¥6–¥8/kg—its tensile strength (310MPA против. ADC12’s 230MPa) prevents part failure.