Engineered to exact particle size distribution (PSD), controlled tap density, and minimal satellite formation for critical industrial sectors.
Al-Si systems represent the pinnacle of lightweight casting and additive consolidation due to their narrow solidification ranges, exceptional castability, and superior coefficient of thermal expansion (CTE) tailoring.
Aluminum silicon alloys (notably AlSi10Mg, AlSi12, and AlSi7Mg) exhibit eutectic solidification behavior around 11.7 wt% Si. This characteristic ensures minimal volume shrinkage and substantially curtails hot tearing tendencies during the rapid heating and cooling cycles inherent to additive laser sintering (LPBF) and metal injection molding (MIM).
By strictly managing oxygen pickup (<1200 ppm) and nitrogen trace inclusions during high-pressure inert gas atomization (VIGA), Toyal JWX achieves ultra-fine cellular dendritic microstructures. This microscopic arrangement enables yield strengths surpassing 320 MPa and elongation rates (>8%) exceeding conventional gravity cast equivalents without requiring protracted homogenizing heat treatments.
| Alloy Grade | Silicon (Si wt%) | Magnesium (Mg wt%) | Apparent Density | Hall Flow Rate | Primary Industrial Vector |
|---|---|---|---|---|---|
| AlSi10Mg (High Sphericity) | 9.0 - 11.0% | 0.20 - 0.45% | 1.45 - 1.60 g/cm³ | ≤ 30 s/50g | Aerospace LPBF Structural Airframes |
| AlSi12 (Eutectic Grade) | 11.0 - 13.0% | ≤ 0.10% | 1.40 - 1.55 g/cm³ | ≤ 32 s/50g | Automotive Radiators Heat Exchangers & Brazing |
| AlSi7Mg0.6 (A357 Equivalent) | 6.5 - 7.5% | 0.45 - 0.70% | 1.42 - 1.58 g/cm³ | ≤ 33 s/50g | High Strength MIM Critical Brackets & Suspension |
| Al-Si Matrix for MMC | 8.5 - 10.5% | 0.30 - 0.50% | 1.50 - 1.65 g/cm³ | ≤ 28 s/50g | Thermal Fillers SiC Reinforcement Matrix |
Operating inside the Ningxiang State-level Economic and Technological Development Zone, Toyal JWX merges high-speed Chinese manufacturing scale with Toyo Aluminium K.K.’s stringent Monozukuri operational quality control.
Our computerized inert-gas atomizers continuously track molten flow temperature, nozzle backpressure, and gas-to-metal velocity ratios. This autonomous feedback loop guarantees batch-to-batch consistency with near-zero satellite satellites and negligible internal porosity.
Direct supply contracts with tier-1 virgin aluminum and hyper-pure chemical-grade silicon smelters insulate our 10,000 t/a operations from raw-material market volatility, securing stable long-term blanket purchase orders for multinational tier-1 industrial clients.
Inheriting process engineering discipline from Toyo Aluminium K.K. (since 2009 acquisition), every drum undergoes LECO interstitial O/N/H quantification, Malvern Mastersizer laser diffraction, and full digital lot genealogy archived for over 10 years.
Aluminum silicon alloys are replacing ductile iron and copper alloys across modern engineering platforms requiring rapid mass-reduction and elevated heat transfer capabilities.
Thermal management pads and cold plates fabricated with spherical Al-Si fillers drastically accelerate battery module cooling while lowering structural weight compared to heavy alumina fillers.
Laser powder bed fusion of fine cut (15-53 µm) AlSi10Mg enables monolithic conformal cooling channels in turbine casings and satellites with wall thicknesses down to 250 microns.
Reinforcing Al-Si powders with SiC, TiB₂, or carbon fibers synthesizes Metal Matrix Composites (AMMC) achieving ultra-high elastic modulus, wear resistance, and matching low CTE for semiconductor bases.
Atomized AlSi12 powders tailored to D50 20-30 µm produce exceptional rheology in non-corrosive flux pastes, vital for brazing complex multi-core automotive air conditioning radiators.
Aluminum silicon powders, especially in micro-fine classifications, fall under strict international multimodal transport regulations. Uncoated spherical aluminum alloys require strict UN 1396 (Class 4.3 - Dangerous When Wet) certification, while select stabilized or coated variants are designated as UN 1309 (Class 4.1 - Flammable Solid).
Toyal JWX operates an enterprise-level regulatory dispatch department capable of managing maritime IMDG, air IATA/ICAO, and overland ADR dangerous goods declarations with zero shipment rejections since our facility inception.
ISO 9001:2015 Quality Management
ISO 14001:2015 Environmental System
Safe Production Metal Powder License
Critical inquiries reviewed by Toyal JWX chief powder metallurgists for international engineering procurement teams.
Yes. Utilizing advanced aerodynamic vortex classifiers, we customize PSD cuts to exacting spans: typically 15–53 µm for SLM/LPBF additive platforms, 20–63 µm for electron beam melting (EBM), and fine fractions below 20 µm (such as D50 ≤ 10 µm) for Metal Injection Molding (MIM) feedstocks and thermal greases. Specific D10, D50, and D90 parameters can be locked per contract batch.
Silicon acts as a powerful fluidizer and lowers the melting point of aluminum (eutectic point at 577°C). In alloys like AlSi10Mg and AlSi12, higher silicon decreases melt viscosity and solid-to-liquid shrinkage, which actively arrests hot cracking during rapid laser scanning. Mechanically, finely dispersed silicon crystals enhance hardness and fatigue limit via solid solution and precipitation strengthening mechanisms.
Our powders are atomized inside a high-purity inert nitrogen atmosphere and sealed with less than 0.12% active moisture. The natural protective passivated alumina (Al₂O₃) shell is regulated to a nanometer-scale thickness (typically 3–5 nm). This minimal layer prevents spontaneous oxidation while providing consistent laser absorption energy during additive manufacturing builds. Every batch is purged and packed under dry nitrogen/argon.
For standard catalog grades (AlSi10Mg, AlSi12, Pure Spherical Al), our minimum order quantity starts at 20 kg for qualification trials, with dispatch within 3–5 business days for stocked fractions. For customized ODM alloy powder batches (custom ternary/quaternary alloys with Sc, Zr, or Cu additions), the minimum campaign run is 500 kg, requiring 2 to 4 weeks depending on raw ingot staging and screening parameters.
Hunan Ningxiang JiWeiXin Metal Powder Co., Ltd. was established in 1997. In December 2009, the operation was jointly acquired by Japan's world-leading Toyo Aluminium K.K. Group and Shanghai Matsuo Co., Ltd. This corporate synergy brings Japanese operational rigour, extensive global patent access, and strict quality control protocols to our massive, efficient modern production center in Ningxiang.
Source directly from our factory floor. Choose your alloy grade below to connect with our regional technical application team.
