Die Casting

Quick AnswerZinc is stronger per unit volume than aluminum but heavier (density 6.6 vs 2.7 g/cm3). Zinc offers 3-10x higher ductility, better impact strength, and 3-5x longer die life. Aluminum offers 3x better strength-to-weight ratio and higher service temperatures. Cost-wise, zinc per-part cost is typically 10-30% lower for small parts due to faster cycle times and longer die life. For large parts, aluminum's lower density gives it a weight-based cost advantage.Strength ComparisonTensile strength: ZAMAK 3: 283 MPa, ZAMAK 5: 331 MPa, Aluminum A380: 320 MPa. Comparable. Yield strength: ZAMAK 3: 221 MPa, A380: 160 MPa. Zinc is stronger in yield. Elongation: ZAMAK 3: 10%, ZAMAK 5: 7%, A380: 1-3%. Zinc is 3-10x more ductile. Impact strength (Izod): ZAMAK 3: 58 J/m, A380: 3-5 J/m. Zinc absorbs 10-20x more impact energy. Hardness: ZAMAK 3: 82 HB, A380: 80 HB. Similar.Cost ComparisonDie life for zinc: 800,000-1,000,000 shots. For aluminum: 100,000-300,000 shots. Zinc's longer die life spreads tooling cost over more parts. Zinc cycle time is typically 20-40% faster (lower melting point = faster solidification). Zinc melting temperature (385-420°C) vs aluminum (660-680°C) means lower energy costs. Material cost: ZAMAK $2.50-3.50/kg vs A380 $3.00-4.50/kg. For small parts under 200g, zinc is 10-30% cheaper per part at equivalent volumes.Application GuidanceChoose zinc when: part weight is not critical, thin walls are needed (0.3-0.8mm), impact resistance is important, ductility is required for bending or crimping, or very long die life is desired. Choose aluminum when weight is critical, the part is large, operating temperatures exceed 120°C, or pressure tightness is required (aluminum can be impregnated).Why Choose SOMI Custom PartsAt SOMI Custom Parts, we offer both zinc and aluminum die casting, allowing us to recommend the optimal material for each application. We provide a complete cost comparison analysis including material cost, tooling cost amortization, cycle time, and finishing costs. Our engineers can help you decide -- and if needed, we can redesign your part for the more advantageous material.Case StudyAn automotive supplier had a small (50g) latch component in aluminum A380 that was experiencing 5% breakage during assembly due to the alloy's low ductility. SOMI converted the part to ZAMAK 5, increasing elongation from 2% to 7%. The zinc part passed assembly testing with zero breakage. Cycle time decreased by 25%, die life was projected at 800,000 shots vs 200,000 for aluminum. Part cost decreased by 18%.Industry DataZinc die casting alloys offer the highest ductility of any common die casting material. The elongation of ZAMAK 3 (10%) is comparable to many wrought aluminum alloys, making it the preferred choice for parts requiring forming or bending after casting (NADCA, 2025). Zinc's lower melting point also reduces greenhouse gas emissions by approximately 40% per part compared to aluminum casting.Related QuestionsWhat products are best for zinc die casting?What is zinc alloy die casting?What is aluminum alloy die casting?What is the difference between die casting and sand casting?

Quick AnswerZinc alloy die casting (primarily ZAMAK 3 and 5) is best suited for small-to-medium precision parts requiring high strength, ductility, thin walls (as thin as 0.3mm), and excellent surface finish. Key applications: automotive interior hardware (door handles, lock components, mirror brackets), locks and security hardware, plumbing fixtures (faucets, valves), electronic connector housings, small gears and mechanical components, toys and hobby products, and decorative hardware.Automotive ApplicationsZinc die casting is widely used for automotive interior components. Door handles, window regulator mechanisms, seat belt components, latch assemblies, and mirror brackets are commonly produced in ZAMAK 3 or 5. Zinc's ductility means these parts can absorb impact without cracking -- critical for safety components. Zinc parts also accept chrome plating and painted finishes that match automotive interior aesthetics.Security and Lock HardwareThe lock industry is a major zinc die casting user. Lock bodies, cylinders, key blanks, padlocks, and deadbolt assemblies benefit from zinc's castability (threads and complex keyways cast in), durability (withstands drilling and sawing), and corrosion resistance (accepts plating easily). Zinc lock components have been in use for over 80 years.Plumbing and Valve ComponentsZinc die casting is ideal for plumbing fixtures. Faucet bodies, valve handles, shower heads, and pipe fittings are commonly produced in ZAMAK. Zinc's corrosion resistance, ability to cast smooth water passages, and excellent plating characteristics make it a cost-effective alternative to brass for many plumbing applications.Consumer and Hardware ProductsZinc die casting produces a vast range of consumer products: electrical plugs and sockets, power tool housings, toy cars and figures, model train components, belt buckles, zipper pulls, cabinet hardware, and decorative medallions. The low melting temperature allows longer die life, making zinc economical for high-volume consumer goods.Why Choose SOMI Custom PartsAt SOMI Custom Parts, we offer complete zinc die casting services from mold design to finished, plated parts. Our experience spans automotive, hardware, plumbing, and consumer products. We help you select the optimal ZAMAK alloy (3 for general purpose, 5 for higher strength) and provide secondary operations including CNC machining, plating (chrome, nickel, brass), and powder coating.Case StudyA door hardware manufacturer needed a decorative door handle that combined complex styling with durable function. The handle required a smooth, void-free surface for nickel-chrome plating, thin decorative fluting, and a threaded attachment. SOMI die cast the handle in ZAMAK 3, achieving 0.5mm flutes with perfect plating surface. Plating adhesion testing confirmed zero blistering after 200 hours of humidity testing.Industry DataZinc die casting accounts for 25% of the global die casting market by tonnage. ZAMAK 3 is the most widely used alloy, representing 70% of all zinc die castings. The average zinc die casting tool produces 800,000-1,000,000 parts before requiring significant maintenance -- 3-5x longer than aluminum tooling (International Zinc Association, 2025).Related QuestionsHow does zinc compare to aluminum in die casting?What is zinc alloy die casting?What is the difference between die casting and sand casting?Should I choose die casting or CNC machining?

Quick AnswerAluminum die casting tooling typically requires 8-12 weeks from order to production-ready: design (2-3 weeks), steel machining (4-6 weeks), benching and polishing (1-2 weeks), and tryout/qualification (1-2 weeks). Production lead time after tooling approval: 3-4 weeks for first articles, then 2-3 weeks for repeat orders. Rush service can reduce tooling to 4-6 weeks.Tooling Lead Time BreakdownWeeks 1-3: Design and engineering. CAD design of the die, thermal analysis, cooling channel layout, ejection system design. Weeks 3-8: CNC machining. Rough and finish machining of die steel (H13, D2). This is the longest phase. Complex dies with slides, lifters, and cores require more machining time. Weeks 8-10: Benching and polishing. Manual finishing, surface texturing (if required), assembly of moving components. Weeks 10-12: Tryout and qualification. Sample parts are produced, inspected, and dimensional reports generated. Design modifications, if needed, are made.Production Lead TimeAfter tooling approval (or for repeat orders on existing tools), standard production lead time is 3-4 weeks. This includes: material procurement (1 week for standard alloys), die setup and preheating (1-2 days), production (varies by volume -- 10,000 parts at 1 minute cycle = 1-2 weeks), quality inspection (1-2 days), secondary operations if needed (CNC, heat treat, finishing -- 1-2 weeks), and shipping (3-7 days by air, 25-40 days by sea).Factors Affecting Lead TimeDie complexity: Simple 2-plate dies are fastest. Dies with slides, lifters, unscrewing mechanisms, or vacuum systems take 30-50% longer. Die steel availability: Standard H13 steel is readily available; specialty steels require sourcing. Design maturity: Well-defined, fully detailed designs proceed faster. Changes during fabrication add 1-4 weeks. Production quantity: Larger quantities require more production time but tooling time is unaffected.Why Choose SOMI Custom PartsAt SOMI Custom Parts, we manage the entire die casting process from tool design to production delivery. Our project managers provide weekly status updates and identify potential delays early. We maintain relationships with die steel suppliers for rapid material sourcing. For urgent projects, we offer accelerated tooling schedules with dedicated machining capacity. Contact us for a specific lead time quotation for your project.Case StudyA consumer electronics company needed production tooling for a new aluminum heatsink within 7 weeks to meet a product launch deadline. SOMI assigned dedicated design and machining resources, completed the tool design in 10 days, and prioritized the die through our CNC department. Tooling was completed in 6.5 weeks, and first article samples were approved within 3 days. Production of 15,000 units shipped on time for the product launch.Industry DataAccording to the North American Die Casting Association (NADCA), the average die casting tooling lead time in 2025 is 11 weeks, down from 14 weeks in 2020 due to improved CAM software and faster CNC machines. Rush tooling (4-6 weeks) typically carries a 25-40% premium. Repeat production orders average 3.2 weeks lead time.Related QuestionsWhat is aluminum alloy die casting?Should I choose die casting or CNC machining?What makes aluminum die casting ideal for automotive parts?What is the difference between die casting and sand casting?

Quick AnswerAluminum die casting is ideal for automotive and aerospace because it combines lightweight (2.7 g/cm3, 1/3 the weight of steel) with excellent strength, design freedom for complex geometries, high production rates (40-120 parts per hour per cavity), consistent dimensions across millions of parts, and corrosion resistance. These properties enable fuel-efficient vehicles and lightweight aircraft structures at mass-production scale.Weight ReductionReplacing a steel component with aluminum die casting reduces weight by 50-65% while maintaining adequate strength. In automotive, reducing vehicle weight by 100 kg reduces fuel consumption by 0.3-0.5 L/100 km. In aerospace, every kilogram saved reduces fuel costs by approximately $3,000 per year of operation. Aluminum A380 die casting alloy has a tensile strength of 320 MPa -- sufficient for most structural applications.Design FreedomDie casting produces complex geometries impossible with other processes: integrated heat sink fins, internal oil and coolant passages, thin walls down to 0.8mm, intricate ribbing patterns for stiffness, and cored holes that eliminate drilling. A single die cast part can replace assemblies of 5-15 stamped or machined components, reducing weight, cost, and assembly complexity.Production EfficiencyAutomotive die casting is a high-speed process. A 4-cavity die casting die produces 160-480 parts per hour. Modern die casting cells are fully automated: molten metal is metered and injected robotically, parts are extracted automatically, and quality inspection is integrated. This efficiency makes aluminum die casting the standard for high-volume automotive production.RecyclabilityAluminum is 100% recyclable without quality degradation. Recycling aluminum requires only 5% of the energy needed for primary production. Aluminum die casting scrap (gates, runners, and rejected parts) is recycled in-house, achieving material utilization rates of 95%+.Why Choose SOMI Custom PartsSOMI Custom Parts provides aluminum die casting services for automotive and industrial applications. Our engineers provide DFM feedback to optimize part design for die casting, and we offer the full range of secondary operations including CNC machining, heat treatment (T6), pressure testing, and surface finishing. We maintain IATF 16949-compatible quality systems for automotive applications.Case StudyAn automotive EV manufacturer needed a battery pack enclosure cover that was lightweight, structurally rigid, and electrically conductive for EMI shielding. SOMI die-cast the 600x400mm cover in A380 aluminum with 1.5mm wall thickness, integrated ribbing for stiffness, and cored mounting bosses. Weight: 1.8 kg versus 5.2 kg for the steel alternative. Production: 25,000 units per year at $12 each, delivered with 100% CMM inspection.Industry DataThe average modern passenger car contains 180-200 kg of aluminum, up from 100 kg in 2010 (Aluminum Association, 2025). Die casting accounts for 65% of all aluminum automotive components. The aerospace sector uses 15-20% of total aluminum die castings, primarily for non-structural components like brackets, housings, and heat exchangers.Related QuestionsWhat is the typical lead time for die casting?Should I choose die casting or CNC machining?What is the difference between die casting and sand casting?What is zinc alloy die casting?

Quick AnswerFor production volumes above 10,000 units, die casting is 3-10x more cost-effective than CNC machining per unit. The breakeven point is typically between 3,000-8,000 units depending on part complexity. Die casting is ideal for thin-walled, complex geometries with moderate tolerances (±0.003"). CNC machining is better for small volumes, tight tolerances (±0.0005"), solid monolithic parts, and parts requiring features impossible to cast.Cost Comparison at ScaleFor a typical aluminum bracket (100g): CNC machining at 1,000 units: $8-15 each. At 10,000 units: $6-10 each. Die casting at 1,000 units (including tooling amortization): $15-30 each. At 10,000 units: $2-5 each. At 50,000 units: $1-3 each. The breakeven point where die casting becomes cheaper is typically 3,000-8,000 units depending on tooling cost. Higher tooling costs push the breakeven point higher.Performance and Quality ComparisonCNC machined parts have superior mechanical properties (no porosity, uniform grain structure) and tighter tolerances (±0.0005" vs ±0.003"). Die cast parts can have minor porosity (1-3% by volume) that may affect pressure tightness. CNC parts require no draft angles; die cast parts need 1-3 degrees. CNC can produce undercuts; die casting requires slides and lifters. CNC surface finish: 0.8-3.2 Ra. Die casting: 1-3 Ra (as-cast).Design Freedom ComparisonDie casting excels at producing complex shapes with thin walls, internal cavities, and intricate details in a single operation. CNC machining excels at precision features like threaded holes, precision bores, flat surfaces with tight flatness, and three-dimensional contours. The best approach is often a hybrid: die cast a near-net shape, then CNC machine critical features.Why Choose SOMI Custom PartsAt SOMI Custom Parts, we offer both die casting and CNC machining services, allowing us to recommend the optimal process -- or combination of processes -- for your project. We frequently recommend die casting for the main body with selective CNC machining of critical features. This hybrid approach delivers the cost efficiency of casting with the precision of machining.Case StudyA lighting manufacturer needed 80,000 aluminum LED heatsink housings per year. The complex fin geometry required thin walls (1.2mm) and precise fin spacing for thermal performance. Die casting was the only economical option, but the critical mounting surface needed ±0.0005" flatness. SOMI produced the housings as near-net die castings, then CNC-machined the mounting surface in a secondary operation. Cost: $2.50 each versus $12 for all-CNC.Industry DataThe average die casting tooling cost for an aluminum part is $25,000-$60,000, compared to minimal tooling for CNC machining. However, at volumes above 10,000 units, die casting per-unit costs are 60-85% lower than CNC machining (NADCA, 2025). The hybrid cast + machine approach is growing 12% annually as manufacturers seek to balance cost and precision.Related QuestionsWhat is the difference between die casting and sand casting?What is aluminum alloy die casting?What is the typical lead time for die casting?What makes aluminum die casting ideal for automotive parts?

Quick AnswerDie casting injects molten metal (aluminum, zinc, magnesium) into reusable steel dies under high pressure, producing precise parts with excellent surface finish and thin walls. Sand casting pours molten metal into disposable sand molds, suitable for larger parts, ferrous metals (iron, steel), and low volumes. Die casting tolerances: ±0.002" per inch. Sand casting: ±0.030" per inch. Die casting cycle: 30-90 seconds. Sand casting: hours per part.Process ComparisonDie Casting: Molten metal is injected at 1,500-25,000 psi into precision-machined steel dies. The high pressure ensures complete cavity fill, fine detail reproduction, and dense grain structure. Dies are water-cooled for rapid solidification. Typical cycle: 30-90 seconds. Maximum part size: typically under 600mm. Sand Casting: A pattern is pressed into sand mixed with binder to create a mold cavity. Metal is poured under gravity. The sand mold is broken to remove the casting. Typical cycle: hours to days. Maximum part size: up to several meters.Surface Finish and AccuracyDie cast parts have surface finishes of 1-3 microns Ra, requiring minimal post-processing. Sand castings have rough surfaces (12-25 microns Ra) requiring extensive grinding and machining. Die casting holds ±0.002" on the first inch and ±0.001" per additional inch. Sand casting holds ±0.030" on the first 6 inches, plus ±0.002" per additional inch. Die casting can produce walls as thin as 0.5mm (zinc) or 0.8mm (aluminum). Sand casting minimum wall: 3-5mm.Cost and Volume ConsiderationsDie casting tooling costs $10,000-$150,000 but per-unit costs are low at high volumes. Economical above 5,000-10,000 units. Sand casting tooling (patterns) costs $500-$5,000 but per-unit costs remain higher. Economical for 1-5,000 units or very large parts. For aluminum parts over 50,000 units, die casting is 3-8x cheaper than sand casting per piece.Why Choose SOMI Custom PartsAt SOMI Custom Parts, we offer die casting services for aluminum and zinc alloys with complete post-casting capabilities including CNC machining, heat treatment, and surface finishing. Our engineers help you determine which casting process is optimal for your specific part based on material requirements, quantity, tolerance needs, and budget. We also provide DFM feedback to optimize your part design for the selected process.Case StudyAn automotive components manufacturer needed 20,000 aluminum brackets per year. The initial design assumed sand casting at $4.50 each with extensive machining. SOMI's engineering team redesigned the bracket for die casting: thinner walls, integrated mounting bosses, and cored holes. Die casting tooling cost $35,000, but per-unit cost dropped to $1.80. The tooling cost was recovered in 13 months.Industry DataThe global metal casting market is valued at $140 billion, with die casting accounting for 35% and sand casting 45% (North American Die Casting Association, 2025). Die casting productivity has increased 25% over the past decade through improved die cooling, vacuum assist, and automation. Sand casting remains dominant for large parts and ferrous metals.Related QuestionsShould I choose die casting or CNC machining?What is aluminum alloy die casting?What is zinc alloy die casting?What is the typical lead time for die casting?

Quick AnswerAluminum alloy die-casting is a manufacturing process where molten aluminum is injected under high pressure (1,500-25,000 psi) into precision steel molds called dies. The process produces complex-shaped metal parts with excellent dimensional accuracy, smooth surface finish, and high production rates, making it ideal for automotive, aerospace, and consumer product components.How Die Casting WorksThe die casting process involves four main steps: (1) Die preparation - the steel mold is cleaned and lubricated, (2) Injection - molten aluminum at 660-680°C is injected into the die cavity at high pressure, (3) Cooling - the aluminum solidifies rapidly in the water-cooled die, typically in seconds, and (4) Ejection - the finished part is ejected from the die. The entire cycle takes 30-90 seconds depending on part size.Advantages of Aluminum Die CastingHigh Precision: Tolerances as tight as ±0.002" per inch can be maintained. Complex Geometries: Intricate shapes, thin walls (down to 0.5mm), and internal features can be cast. Excellent Surface Finish: Typical surface roughness of 1-2 microns Ra, often requiring no additional finishing. High Production Rates: Thousands of parts can be produced daily from a single die. Material Properties: Aluminum alloys offer excellent strength-to-weight ratio, corrosion resistance, and thermal conductivity.Common Aluminum AlloysA380: The most widely used die casting alloy, offering excellent castability, good mechanical properties, and thermal conductivity. A383: Similar to A380 with better corrosion resistance. ADC12: Popular in automotive applications, good machinability and wear resistance.Why Choose SOMI Custom PartsAt SOMI Custom Parts, we offer comprehensive die casting services including mold design, prototyping, production, and post-casting operations (CNC machining, heat treatment, surface finishing). Our engineering team provides DFM feedback to optimize part design for the die casting process, reducing tooling costs and improving part quality. We handle everything from 500-piece low-volume runs to 100,000+ piece mass production.Case StudyAn automotive lighting manufacturer needed aluminum heat sink housings for LED headlight assemblies. The parts required thin fins (1.2mm thickness), tight flatness tolerances, and minimal porosity. SOMI designed and built the die casting tool, produced 20,000 units per month using A380 aluminum, and delivered with CMM inspection reports showing 99.7% first-pass yield.Industry DataThe global aluminum die casting market was valued at $35.2 billion in 2025, with automotive applications accounting for 65% of demand (NADCA, 2025). Aluminum die casting is 3-5 times faster than sand casting and produces parts with 2-3x better mechanical properties due to the rapid cooling and dense grain structure from high-pressure injection.Related QuestionsWhat is Zinc Alloy Die-Casting?What is the difference between die casting and sand casting?When should I choose die casting over CNC machining?What is the typical lead time for die casting?

Quick AnswerZinc alloy die-casting uses molten zinc alloys (primarily ZAMAK 3 and ZAMAK 5) injected into steel dies under high pressure. Zinc offers unique advantages over aluminum including the ability to cast thinner walls (down to 0.3mm), superior impact strength and ductility, longer die life, and lower melting temperatures that reduce energy costs.How Zinc Die Casting Differs from AluminumZinc die casting operates at lower temperatures (385-420°C vs 660-680°C for aluminum), which extends die life significantly (500,000-1,000,000 shots for zinc vs 100,000-300,000 for aluminum). Zinc also flows more easily into thin sections and intricate details, enabling wall thicknesses as thin as 0.3mm compared to 0.5-0.8mm minimum for aluminum.ZAMAK AlloysZAMAK 3: The most common zinc die casting alloy, offering excellent castability, dimensional stability, and mechanical properties. Used for automotive components, hardware, and consumer products. ZAMAK 5: Contains 1% copper for higher strength and hardness. Used for parts requiring greater wear resistance. ZA-8: Higher aluminum content for improved strength at elevated temperatures.ApplicationsZinc die casting is widely used for: automotive interior components (door handles, latch mechanisms), lock bodies and security hardware, plumbing fixtures (faucets, valves), electronic connector housings, gears and small mechanical components, and decorative hardware requiring fine detail and plating.Why Choose SOMI Custom PartsSOMI Custom Parts provides complete zinc die casting services from mold design to finished parts, including secondary operations like CNC machining, plating, powder coating, and assembly. Our engineers help you select the optimal alloy and design features that maximize the benefits of zinc casting -- whether you need the ductility of ZAMAK 3 for snap-fit assemblies or the wear resistance of ZAMAK 5 for moving components.Case StudyA security hardware manufacturer needed zinc die-cast lock housings with complex internal geometry for a new electronic lock design. The part required 1.5mm wall thickness, threaded inserts, and a decorative brushed nickel finish. SOMI produced the ZAMAK 3 die casting tool and delivered 10,000 units per month with consistent quality. The lower zinc melting temperature resulted in 30% faster cycle times than an equivalent aluminum part.Industry DataZinc die casting accounts for approximately 25% of the global die casting market. ZAMAK alloys offer the highest ductility of all die casting materials, with elongation of 3-10% compared to less than 1% for typical aluminum die casting alloys (NADCA, 2025). This makes zinc the preferred choice for parts requiring bending, crimping, or snap-fit assembly.Related QuestionsWhat is Aluminum Alloy Die-Casting?What is the difference between die casting and sand casting?How does zinc compare to aluminum in die casting?What products are best suited for die casting?