Machining Nitronic 60 (UNS S21800): Speeds & Feeds, Tooling & Best Practices

Technical machining guide for Nitronic 60 (UNS S21800) (Austenitic Anti-Galling Stainless): optimal cutting speeds (40 - 70 m/min), feeds (0.06 - 0.14 mm/tooth), hardness (200-240 HB), and precision manufacturing practices.

Engineering Specifications & Parameters

Chip Load (fz) 0.06 - 0.14 mm/tooth
Material Grade Nitronic 60 (UNS S21800)
Material Hardness 200-240 HB
Cutting Speed (Vc) 40 - 70 m/min
Alloy Classification Austenitic Anti-Galling Stainless
Primary Applications Marine valve stems, pump wear rings, and threaded fasteners ...

Material Properties & Machinability Profile

Nitronic 60 (UNS S21800) is classified as a Austenitic Anti-Galling Stainless widely specified for mission-critical components requiring Marine valve stems, pump wear rings, and threaded fasteners operating in subsea environments..

Engineering Kinematics & Cutting Parameters

  • Material Hardness: 200-240 HB.
  • Recommended Cutting Speed ($V_c$): 40 - 70 m/min with dedicated substrate coatings.
  • Chip Load ($f_z$): Maintained between 0.06 - 0.14 mm/tooth to prevent tool rubbing or excessive mechanical shock.
  • Machinability Challenge: Silicon-manganese addition provides superior resistance to metal-to-metal galling, fretting, and cavitational erosion.
  • Tooling Strategy: Employs high-pressure flood coolant (>= 30 bar) and micro-grain carbide or specialized inserts with positive rake geometries.

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Frequently Asked Questions

What cutting speed is recommended for Nitronic 60 (UNS S21800)?

Optimal cutting speeds range from 40 - 70 m/min depending on roughing vs finishing passes and machine tool rigidity.

How does UCAN ROBOT manage tool wear when cutting Nitronic 60 (UNS S21800)?

We implement in-process tool monitoring, rigid toolholder systems, and high-pressure through-spindle coolant to dissipate cutting heat immediately.