Alloy Steel Machining Services
PRECI5 engineers and manufactures custom structural and high-strength mechanical components utilizing advanced alloy steels. From heat-treated shafts to aerospace gears, discover our machining parameters, material grades, and stringent quality protocols.
High Hardenability & Strength
Alloy steels enriched with chromium, molybdenum, and nickel provide exceptional tensile strength, impact toughness, and deep through-hardening capabilities.
Tight Tolerance Control
PRECI5 leverages multi-axis CNC milling and high-precision turning centers to maintain dimensional tolerances up to ±0.005 mm across pre-hardened and annealed stocks.
Integrated Heat Treatment
Comprehensive stress relief, case carburizing, induction hardening, and quenching & tempering services to achieve optimal surface hardness and core ductility.
Alloy Steel Grade Catalog
Explore individual alloy steel profiles, machining characteristics, and typical industrial use cases.

AISI 4140 CNC Machining Services | Precision Parts & Components
Expert AISI 4140 CNC machining services for high-load components. Specialized in 4140 pre-hardened and Q&T steel. Precision milling, turning, and grinding.
View details →
AISI 4130 CNC Machining Services | Precision 4130 Steel Components
PRECI5 provides high-precision AISI 4130 CNC machining for industrial and structural applications. Expert 5-axis milling and turn-mill capabilities. Upload your drawing for a quote.
View details →
42CrMo4 CNC Machining Services | Precision Alloy Steel Components | PRECI5
PRECI5 specializes in high-precision 42CrMo4 CNC machining. Expert 5-axis milling, turn-mill, and grinding for complex alloy steel parts. Request a quote.
View details →Full lot traceability with CMM inspection and raw material MTR certificates.
High-rigidity machining fixtures tailored to minimize tool deflection.
Complex structural geometry, deep-pocket milling, and contour turning.
Black oxide, phosphating, zinc plating, and thermal protective coatings.
Request an Alloy Steel Machining Quote
Submit your 2D drawings (DWG, DXF, PDF) and 3D CAD files (STEP, IGES) along with material specifications and required heat treatment. PRECI5 provides prompt DFM feedback and competitive quoting.