Staballoy AG17 is a high-manganese austenitic stainless steel developed by ATI specifically for non-magnetic downhole drilling components — drill collars, MWD (measurement-while-drilling) tools, LWD (logging-while-drilling) tools, and other drill string hardware that must stay magnetically neutral so directional-drilling sensors can take accurate readings. Its chemistry is built around an unusually high manganese content (roughly 20%) combined with 17% chromium and 0.50% nitrogen, a combination chosen to keep the alloy fully austenitic and non-magnetic under the severe mechanical loading downhole tools experience, while resisting galling under the high makeup torque these threaded connections see in service.

Mechanical and magnetic properties are qualified to API 7 industry standards, and the alloy carries excellent resistance to chloride-induced stress corrosion cracking. Beyond drilling applications, the same non-magnetic, high-strength, galling-resistant profile makes Staballoy AG17 useful anywhere a component needs to stay non-magnetic under heavy mechanical or torsional load — instrumentation housings, non-magnetic fasteners, and other specialty components where a standard 300-series stainless doesn't have the strength or galling resistance the application demands. A higher-strength variant, Staballoy AG17 HS, is available for critical non-magnetic drill stem components such as compressive-service drillpipe requiring improved yield strength and fatigue properties.

Staballoy AG17's chemistry is engineered for extreme galling resistance and non-magnetic stability under heavy mechanical load — and every element responsible for that (20% manganese, 17% chromium, 0.50% nitrogen) makes it a genuinely demanding material to machine. The manganese and nitrogen levels are both far above what a standard austenitic stainless carries, and together they drive an aggressive work-hardening response and cutting forces that exceed even galling-resistant grades like Nitronic 60, which uses a much lower nitrogen content (0.08-0.18% versus roughly 0.50% here).

Machinists should treat this alloy as one of the most demanding high-manganese austenitic stainless grades on the market: sharp, positive-rake carbide that shears cleanly rather than rubs is mandatory, since any dwell or rubbing contact immediately work-hardens the surface and makes the next pass dramatically harder to cut. Feed rates need to stay consistently high enough to always cut beneath the previous pass's hardened layer — hesitating anywhere in the cut invites rapid edge failure. A tough, wear-resistant coated grade with strong edge support handles the combination of high cutting forces and abrasive wear far better than a fine, delicate edge.

Rigidity throughout the machine, toolholder, and workholding chain, generous coolant flow, and speeds noticeably more conservative than standard austenitic stainless are the baseline for working with this grade successfully — Staballoy AG17 is not a material to push aggressively.