42CrMo Alloy Steel Investment Castings | High-Precision Custom Parts
Our 42CrMo (AISI 4140 equivalent) alloy steel investment castings deliver exceptional strength-to-weight ratios with tensile strength up to 1080 MPa. Precision-cast using advanced lost-wax techniques, these components feature superior surface finishes (Ra 3.2μm achievable) and dimensional accuracy (±0.5% tolerance). Ideal for aerospace, oil/gas, and heavy machinery applications requiring fatigue-resistant parts.
Products advantage
✓ 30% Cost Savings vs. Machining from Solid
✓ AMS 5355 & ASTM A148 Compliant
✓ Custom Heat Treatments Available (Quenching/Tempering)
✓ NDT Testing (X-Ray, MPI) as Standard
✓ Lead Time 4-6 Weeks for Prototypes
|
Property |
Metric Value |
ASTM Standard |
|---|---|---|
|
Tensile Strength |
950-1100 MPa |
A370 |
|
Hardness |
28-32 HRC |
E18 |
|
Elongation |
12% min |
A370 |
|
Impact Energy |
35J @ 20°C |
E23 |
FAQ
Q: What are the main advantages of 42CrMo investment castings?
A: ● High dimensional accuracy: Capable of producing complex geometries and fine features ● Excellent mechanical properties: Achieves optimal combination of strength, wear resistance and fatigue resistance after quenching-tempering ● Superior surface quality: Better surface finish than conventional casting methods, reducing machining allowance
Q: What are Standard heat treatment processes for 42CrMo Casting Parts?
A: ● Quenching and tempering: Optimizes strength-toughness balance ● Normalization: Refines grain structure ● Case hardening (carburizing/nitriding): Enhances surface wear resistance ● Industrial machinery: Gearbox housings, bearing supports
Q: What are the common defects of 42CrMo castings and their solutions?
A: ● Porosity: Optimize melting parameters and pouring temperature control ● Cracking: Improve mold design with progressive cooling ● Segregation: Strict alloy composition monitoring and controlled cooling
Q: In which fields are 42CrMo investment castings mainly applied?
A: ● Automotive: Transmission gears, drive shafts, connecting rods ● Aerospace: Power components, landing gear parts ● Oilfield equipment: Wellhead valves, drilling tools
