CNC steel machining refers to manufacturing high-strength steel components through precision milling, turning, and multi-axis machining. Strongd serves automotive, aerospace, and industrial sectors, producing gears, shafts, hydraulic blocks, engine mounts, and custom tooling. We support prototype validation to high-volume production.
Advantages
Extreme Precision
CNC machining achieves critical tolerances for high-load applications:
Tolerance: ±0.01mm (grinding optional for ±0.002mm)
Surface finish: Ra 0.4μm achievable
Material integrity: No heat-affected zones vs. welding
01
Material Versatility
Process all steel grades:
Tool steels: D2, H13 (HRC 50-62)
Alloy steels: 4140, 4340
Stainless: 303, 304, 17-4PH
02
High-Rigidity Machining
50+ heavy-duty CNC machines: 15,000+ rpm spindles
Deep-hole drilling: Up to 30× diameter
Hard machining: Capable to HRC 65
03
Applications
Prototyping ensures performance under stress. Critical uses include:
Powertrain: Transmission gears, crankshafts
Hydraulics: Valve bodies, pump housings
Automation: Robot joint assemblies, linear guides
04
Surface Treatment
Performance-enhancing finishes:
Hardening: Case hardening, induction hardening
Corrosion resistance: Zinc-nickel plating, passivation
Wear protection: TiN/TiCN coating (3–5μm)
Aesthetics: Electropolishing, powder coating
05
Our IATF 16949/AS9100-certified team combines metallurgical expertise with advanced 5-axis capabilities. We optimize designs for steel machinability (DFM), enforce 100% hardness testing and CMM inspection, and guarantee 99% on-time delivery. 92% clients place repeat orders.
Production Process
Design Review
Analyze CAD models (STEP, IGES, SolidWorks)Confirm material grade, heat treatment, and GD&T
01
Material Certification
Source certified steel billets/bars
Provide Mill Test Reports (MTRs)
02
CNC Programming
CAM simulation for tool deflection control
Optimized feeds/speeds for hardened steels
03
Machining
Roughing: High-torque milling (50+ hp)
Finishing: Precision turning/milling (±0.005mm)
04
Deburring
Electrochemical deburring for internal features
Edge radiusing (0.1–0.5mm)
05
Heat Treatment
Vacuum hardening/tempering (as required)
06
Inspection
CMM (Zeiss Contura) with GD&T reports
Hardness testing (Rockwell C scale)
07
Surface Coating & Shipping
Apply specified coatings
Anti-rust VCI packaging
08
FAQ
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