FV607 belongs to the "FV" series of British aerospace stainless steels originally developed by Firth Vickers of Sheffield, the same house that produced the better-documented FV520B, FV535, and FV566 grades. The FV numbering system covers a family of chromium-molybdenum(-vanadium) martensitic, precipitation and creep-resisting stainless steels engineered for gas turbine and high-strength airframe hardware — compressor and turbine components, shafts, fasteners, and structural fittings that need to hold strength and dimensional stability at moderately elevated temperature.

FV607 is a genuinely less-documented member of this family: unlike FV520B or FV535, its precise chemistry and governing British Standard/DTD specification are not consistently published in open technical literature. Rather than publish a fabricated composition table, this page presents FV607 in the context of its FV-series relatives and flags where verified data was not available. If FV607 is called out on a drawing, always confirm the governing specification and mill certificate composition before finalizing a machining or heat-treat plan — do not assume it is interchangeable with FV535 or other named FV grades without checking the actual print callout.

No independently verifiable UNS, DIN/Wnr., or AISI cross-reference for FV607 was found in publicly accessible technical sources at the time of writing. Confirm the specific British Standard or aerospace material specification directly from the engineering drawing or mill certificate before ordering or heat-treating.

A verified, source-backed chemical composition for FV607 specifically could not be confirmed. Rather than publish unverifiable percentages, we recommend requesting the mill certificate or the governing British Standard/DTD specification referenced on your drawing. As a general reference, sister grades in the FV series (e.g. FV535) are Cr-Ni-Mo-V martensitic stainless steels in the 12-14% chromium range — use this only as family context, not as a substitute for verified FV607 data.

Treated as a member of the FV martensitic precipitation/creep-resisting stainless family, FV607 should be expected to machine similarly to other tempered 12-14% chromium PH and creep-resisting grades: moderate-to-high cutting forces, a tendency toward work hardening if the tool rubs instead of shearing, and reduced tool life compared to plain carbon or low-alloy steel at equivalent hardness. These alloys are normally supplied and machined in the hardened-and-tempered condition rather than annealed, so stock hardness should always be confirmed against the mill certificate before setting speeds and feeds.

Rigid workholding and a rigid machine are important given the strength level typical of this family — deflection under load is a bigger risk to dimensional accuracy than on softer stainless grades. Sharp, positive cutting edges with adequate feed reduce the risk of work hardening the surface on the pass, and coolant helps manage the heat concentration typical of low-thermal-conductivity stainless alloys.

Representative starting values for a tempered 12-14% Cr martensitic aerospace stainless in this strength class — reduce toward the low end for higher-hardness certified stock.

Turning

Parting / Grooving

Milling