Czechcasting — 4209

Exploring the World of Czechcasting: Uncovering the Mystery Behind the Unique Production Code: 4209

A German Tier‑1 supplier requested a for a turbo‑charger housing. By switching from forged steel to Al‑Si 356 (CzechCasting 4209) , they achieved a 28 % mass cut while maintaining a yield strength of 250 MPa after T6 heat treatment. The part entered series production for the 2025 model of a premium sedan, saving an estimated 12,000 kg of CO₂ per 10,000 vehicles. czechcasting 4209

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| Parameter | Value (Typical) | Why It Matters | |-----------|----------------|----------------| | | ±0.02 mm (critical surfaces) | Guarantees interchangeability and reduces secondary machining. | | Surface Roughness (Ra) | ≤0.8 µm (as‑cast) | Improves fatigue life and eliminates the need for polishing in many cases. | | Porosity | ≤0.5 % (vol.) | Enhances structural integrity, crucial for pressure vessels and aerospace parts. | | Heat‑Treatment | Solution‑anneal + aging (Al‑Si) or quench‑tempered (steel) | Optimizes strength‑to‑weight ratio. | | Alloy Options | Al‑Si 319, 356; 1.4404 (AISI 316L); Inconel 718 | Covers a spectrum from lightweight to high‑temperature service. | | Maximum Casting Size | 400 mm × 400 mm × 300 mm (custom tooling can extend to 600 mm) | Handles both small intricate components and larger structural parts. | | Lead Time | 4–6 weeks (standard), 2–3 weeks (express) | Fast turn‑around thanks to digital workflow and in‑house pattern‑making. | | Environmental Footprint | CO₂e ≈ 1.2 kg per kg of Al‑Si casting (30 % lower than industry average) | Achieved via 100 % renewable electricity and closed‑loop sand reclamation. | Exploring the World of Czechcasting: Uncovering the Mystery