Heavy-Duty Titanium CNC Machining for Energy & Power Infrastructure

In hydrogen compression and transport, molecular hydrogen penetrates metal lattices under high pressure — causing catastrophic hydrogen embrittlement failure. Grade 5 Titanium's inherent resistance to hydrogen permeation, combined with our ultra-precision 5-axis machining that eliminates surface micro-cracks and cold-worked layers, creates impellers that withstand extreme centrifugal stresses without embrittlement. Aerodynamic blade profiles are milled in single-setup operations for optimal flow dynamics.

• 5-axis blisk milling of aerodynamic blade profiles — single-setup reduces cold-work layer formation
• Stress-relief heat treatment (700-785°C vacuum anneal) — eliminates residual tensile stress that attracts H atoms
• Hydrogen content verified ≤ 0.0125% per ASTM E1447 — certifies embrittlement-free material

Hydrogen diffuser rings and valve blocks must maintain leak-tight integrity across extreme pressure differentials and thermal cycles. Our multi-axis machining produces complex internal flow passages with mirror-finish surfaces that eliminate turbulence-induced hydrogen permeation — while O-ring sealing faces are held to Ra ≤ 0.4 µm for zero-leak performance in supercritical hydrogen service.

• Internal flow channel surface finish ≤ Ra 0.4 µm — reduces localized H₂ permeation potential
• O-ring groove dimensional accuracy ±0.01 mm — certified for 1,000+ bar hydrogen service
• 100% helium leak testing — sensitivity to < 1×10⁻⁹ mbar·L/s for hydrogen containment

Control rod drive mechanisms (CRDM) demand absolute positional accuracy and smooth linear motion over decades of service — with zero tolerance for jamming or sticking under neutron irradiation. Our multi-axis CNC milling and Swiss turning produce CRDM guide tubes, drive shafts, and dashpot housings from nuclear-grade titanium, holding straightness and concentricity to ±0.005 mm. Grade 5's high-temperature creep resistance ensures dimensional stability through thousands of thermal cycles.

• CRDM straightness ≤ 0.005 mm over 1m length — critical for drop-time safety margins
• High-temperature creep resistance verified — Grade 5 maintains dimensional stability at 300°C+ coolant temps
• Low neutron absorption cross-section — titanium minimizes reactivity penalty vs. stainless steel

Supercritical water and liquid metal coolants in advanced SMR designs demand sealing surfaces that contain extreme pressures without permeation. Our multi-axis machined titanium sealing faces and containment vessels are engineered to zero-leak standards, with surface finishes and flatness tolerances that contain supercritical water and liquid metal coolants without permeation. Grade 2 titanium provides optimal corrosion resistance in primary coolant environments, while Grade 5 handles higher mechanical loads in pressure boundary applications.

• Sealing surface flatness ≤ 0.005 mm per 100mm — contains supercritical water up to 250 bar
• Grade 2 titanium — zero corrosion in BWR/PWR primary coolant chemistry
• Full ASME BPVC Section III documentation available — nuclear QA traceability

Machining inevitably leaves tensile residual stresses on component surfaces — the initiation points for fatigue cracks under cyclic loading. Our controlled shot peening process bombards the surface with precision media at calibrated intensity, converting the tensile surface layer into deep compressive residual stress. This compressive layer physically prevents crack initiation and retards propagation, extending component fatigue life by up to 300% in hydrogen compressor and nuclear applications.

• Controlled shot peening per SAE J443 — converts tensile surface to beneficial compressive stress
• Compressive depth 0.2-0.5 mm — physically blocks crack initiation at stress concentration points
• Almen strip intensity verification — documented peening parameters per component lot

The effectiveness of shot peening is validated through rotating beam fatigue testing. Components operating under cyclical pressure spikes — hydrogen compressor impellers at 20,000+ RPM, CRDM drive shafts cycling under reactor power changes — achieve up to 3× longer service life.

• Rotating beam fatigue testing (ASTM E466) — verifies S-N curve improvement post-peening
• Fatigue life improvement documented — up to 300% increase in cycles-to-failure at typical operating loads
• Non-destructive residual stress measurement (XRD) available — verify compressive layer depth