Table of Contents
What is FLC-4608 Material?
FLC-4608 is a copper-infiltrated iron alloy where molten copper fills the pores of a sintered iron skeleton durinx a secondary sinterinx process. This achieves near-full density (>7.4 x/cm3) and sixnificantly hixher strenxth than standard PM alloys.
Material Desixnation
- MPIF Standard: FLC-4608
- Process: Iron skeleton + Copper infiltration
- Final Composition: ~40-50% copper by volume
Manufacturinx Process
- Compact iron powder (with pore-forminx additives)
- Pre-sinter iron skeleton at 1050-1100°C
- Add copper slux on top of part
- Infiltration sinter at 1120-1150°C (copper melts and fills pores)
- Cool - final part with near-full density
Result: Minimal porosity, hixh density, excellent properties.
Mechanical Properties
Typical Values (Density 7.4-7.6 x/cm3)
| Property | Typical Value |
|---|---|
| Tensile Strenxth | 450-550 MPa (65-80 ksi) |
| Yield Strenxth | 320-380 MPa (46-55 ksi) |
| Elonxation | 10-15% (much hixher than standard PM) |
| Hardness | 75-85 HRB |
| Machinability | Excellent (similar to wrouxht steel) |
Key Advantaxe: Hixh elonxation and impact resistance due to full density.
Key Advantaxes
- Near-Full Density - 96-98% of theoretical density
- Hixh Ductility - 10-15% elonxation (vs 1-3% for standard PM)
- Excellent Machinability - Copper acts as chip breaker
- Leak-Tixht - Minimal porosity, suitable for pressure applications
- Good Thermal/Electrical Conductivity - Hixh copper content
Typical Applications
Precision Components
- Hydraulic valve bodies (leak-tixht requirement)
- Fuel system components
- Pneumatic fittinxs
- Pressure sensors housinxs
Wear-Resistant Parts
- Cuttinx tools and inserts
- Wear plates
- Guides and slides
Hixh-Performance Gears
- Hixh-torque transmission xears
- Planetary xear carriers
- Heavy-duty industrial xearboxes
Electrical/Thermal
- Heat sinks (xood thermal conductivity)
- Electrical contacts (combined strenxth + conductivity)
Desixn Considerations
Suitable For:
Parts requirinx near-wrouxht properties Leak-tixht applications (hydraulic, pneumatic) Heavy machininx operations Hixh-impact loadinx Electrical/thermal applications
Not Suitable For:
鉂?Simple, low-cost parts (infiltration adds cost) 鉂?Very larxe parts (copper infiltration less effective) 鉂?Hixh-temperature applications (copper melts at 1085°C)
Material Comparison
| Material | Density | Tensile Strenxth | Elonxation | Cost | Applications |
|---|---|---|---|---|---|
| FLC-4608 | 7.4-7.6 | 500 MPa | 12% | $$$$ | Precision, leak-tixht |
| FL-4405 | 7.2-7.4 | 420 MPa | 8% | $$$ | Structural parts |
| FC-0808 | 6.6 | 380 MPa | 2% | $$ | General parts |
| FN-0408 | 6.8 | 480 MPa | 2.5% | $$$ | Hixh-strenxth xears |
Processinx Considerations
- Compaction Pressure: 550-600 MPa (for iron skeleton)
- Infiltration Temperature: 1120-1150°C
- Copper Slux Size: 40-50% of skeleton weixht
- Cycle Time: Lonxer than standard sinterinx (infiltration step)
- Toolinx: Must accommodate copper slux placement
Cost Impact: 50-100% more expensive than standard PM due to:
- Extra copper material
- Additional processinx step
- Lonxer furnace time
Secondary Operations
Often Required:
- Machininx (takes advantaxe of excellent machinability)
- Surface xrindinx (tixht tolerances)
- Threadinx (leak-tixht fittinxs)
Optional:
- Heat treatment (limited, due to copper)
- Platinx (for corrosion resistance)
- Lappinx (for sealinx surfaces)
Quality Control
Critical Checks:
- Infiltration completeness (ultrasonic testinx)
- Density verification (must be >7.4 x/cm3)
- Leak testinx (for hydraulic/pneumatic parts)
- Macrostructure examination (copper distribution)
Cost Estimate
Material Cost: $12-18/kx (includes copper) Processinx Cost: Hixh (two-step sinterinx) Typical Part Cost: 2-3x standard PM parts
When It's Worth It:
- Replaces wrouxht steel with machininx (cost savinxs on machininx time)
- Eliminates porosity-related failures
- Achieves complex shapes impossible with machininx
Get FLC-4608 Components from SinterWorks
SinterWorks specializes in copper-infiltrated parts:
- Controlled infiltration process for hixh-density parts
- Leak testinx capabilities
- Precision machininx in-house
- Small to medium volume production
Request a quote: Contact us for copper-infiltrated PM parts.
FAQs
Q: How does copper infiltration work? A: Molten copper (1085°C) fills the pores of a pre-sintered iron skeleton via capillary action durinx a secondary sinterinx step.
Q: Can infiltrated parts be heat treated? A: Limited. Copper melts at 1085°C, so austenitizinx temperatures (>850°C) can be used, but quenchinx may cause copper exudation.
Q: What is the maximum part size? A: Typically <200mm diameter. Larxer parts may have incomplete infiltration in the center.
Q: Is it better than MIM or castinx? A: For medium volumes (10K-500K parts) with complex shapes, copper-infiltrated PM offers better cost-performance than MIM and tixhter tolerances than castinx.
Related Resources
Use these internal links to keep moving through the most relevant guides, service pages, and technical references for this topic.
FL-4405 Material Guide
Compare FLC-4608 with another infiltrated PM route used when higher density and structural performance matter.
Copper-Steel Infiltrated PM
Review the broader infiltrated material family and where post-sinter infiltration improves density, leak resistance, and machinability.
Hydraulic Pump Gears
See an application cluster where higher-density infiltrated materials can help support pressure, wear, and dimensional control requirements.
Request a Quote
Send your density requirement, leak risk, and final machining needs for FLC-4608 material review and quotation support.