Selecting the right material is the first step in successful DfAM (Design for Additive Manufacturing). IN3DTEC offers the following industry-grade materials:

• Titanium (Ti64, Grade 5): High strength-to-weight ratio, excellent mechanical properties, corrosion resistance, and biocompatibility.
• Aluminum (AlSi10Mg): High plasticity, excellent thermal and electrical conductivity; suitable for welding and pressure processing.
• Stainless Steel (316L): High strength, superior corrosion resistance, and excellent polishing performance.
• 17-4PH Stainless Steel: High elongation, wear resistance, and exceptional tensile/yield strength.
• Maraging Steel: High heat resistance with outstanding tensile strength.
• Copper: Optimized for high electrical and thermal conductivity applications.
• Inconel 718: Exceptional heat resistance for extreme environments.

2.1 Dimensional & Feature Constraints

• Minimum Wall Thickness: For edges/details, we recommend a 0.6mm minimum. For the entire part, a 1.2mm minimum is advised to avoid deformation risks.
• Letters, Grooves, and Steps: * Sunken Font: Width ≥ 0.6mm; Depth between 0.6mm and 1.0mm.
• Protruding Font: Width ≥ 0.6mm; Height ≥ 0.6mm.
• Grooves: Minimum width of 0.6mm.
• Gap Width: A minimum clearance of 0.6mm is recommended between walls.
• Assembly Clearance: If parts require assembly, a single-side clearance of 0.15mm is suggested.

2.2 Threads and Precision Post-Processing

• 3D Printed Threads: Printed threads are generally not suitable for direct use. Tapping or secondary CNC machining is necessary for functional threads.
• Surface Smoothness: To improve finish, export high-resolution STP files rather than low-quality STL. Printing orientation and manual/magnetic polishing also play key roles.
• CNC Machining: IN3DTEC provides integrated CNC machining for 3D printed parts to meet tight tolerances.
• Anodizing Aluminum: Possible, though the finish may not be as uniform as traditional machined aluminum.

2.3 Understanding Supports and Geometric Rules

• The 45° Rule: Angles greater than 45 degrees typically do not require support, while smaller angles do.
• Internal Channels: Smaller channels can often be self-supporting. For complex tube-like structures, splitting parts and then soldering is an effective strategy.
• Support Necessity: While IN3DTEC prefers adding supports to minimize risk, we can accommodate "support-free" research projects upon request (though failure risks are higher).

2.4 Physical Properties & Connectivity

• Density: Our metal prints reach a density of 99.99%.
• Airtightness: IN3DTEC uses specialized tools to test and ensure air and water tightness under varying pressures.
• Soldering/Welding: Metal prints can be joined using a combination of laser welding and argon arc welding.
• Copper vs. Gold: Copper is fully printable; however, Gold is currently unavailable due to its low laser resistance and gas protection complexities.

2.5 Enhancing Strength via Heat Treatment

• Stress Relief Annealing: Common treatment for internal stress relief and preventing deformation.
• Vacuum Annealing (Professional): The superior method to significantly improve bending strength and fatigue resistance.

The cost of metal 3D printing is primarily driven by material weight. To optimize your budget:

• Lightweighting: Reduce weight through Topology Optimization. Software like Altair OptiStruct, nTopology, and Autodesk Fusion 360 can significantly lower costs by removing unnecessary material.
• Expert Review: Selecting a professional provider like IN3DTEC ensures your design is reviewed for manufacturability before printing, preventing costly failures.

Ready to optimize your design? Contact our engineering team for a technical review or an instant quote.