What is AISI4718?
AISI4718 steel is an AISI/SAE standard alloy steel with nickel chromium molybdenum. This comprehensive guide covers chemical composition, mechanical properties, and machining characteristics per AISI/SAE standards.
Chemical Composition
| Element | Content (%) | Standard |
|---|---|---|
| C | 0.28-0.40 | ASTM/GB |
| Cr | 1.40-2.00 | ASTM/GB |
| Mo | 0.30-0.55 | ASTM/GB |
| Ni | 0.80-1.20 | ASTM/GB |
| Fe | Balance | ASTM/GB |
Mechanical Properties
| Property | Value | Standard |
|---|---|---|
| Tensile Strength | ≥550 MPa | AISI/SAE |
| Yield Strength | ≥380 MPa | AISI/SAE |
| Elongation | ≥16% | AISI/SAE |
| Hardness | 185 HV | HV |
| Density | 7.85 g/cm³ | 20°C |
Key Features
- High strength and toughness
- Good hardenability
- Suitable for heat treatment
- Good machinability in annealed condition
- Widely used in automotive and aerospace
Applications
- Automotive components
- Aerospace parts
- High-strength structural parts
- Gear and shaft components
Machinability
AISI4718 steel has good machinability. Recommended: Carbide tools, cutting speed 80-150 m/min, feed 0.15-0.30 mm/rev.
Why Choose Us?
We specialize in precision alloy steel machining. Contact us for a quote!
Turn this machining question into a manufacturable part
Need this material or process for your next CNC project?
Send your STEP, STP, IGES, DXF, PDF, material, quantity, surface finish, and tolerance requirements. We will review manufacturability and reply with practical quotation guidance.
