304 stainless steel is an austenitic chromium-nickel alloy offering superb corrosion resistance, though its work-hardening tendency requires rigid tooling and continuous positive feed.
Engineering Specifications & Parameters
Density
8.00 g/cm³
Hardness
88 Rockwell B (HRB)
Cutting Speed
90 - 160 m/min
Machinability
45% (Moderate)
Yield Strength
215 MPa (31,200 psi)
Material Characteristics
304 stainless steel work-hardens rapidly if tools dwell or rub. Maintaining rigid setup and adequate chip load is crucial.
Machining Guidelines
Tooling: Coated carbide (TiAlN / AlTiN) with sharp cutting edges and positive rake.
Climb Milling: Recommended to minimize work-hardening at entry.
Frequently Asked Questions
Why is stainless steel 304 prone to work-hardening?
Its austenitic crystal structure transforms under mechanical stress, rapidly increasing hardness at the cut interface if the tool rubs instead of shearing.
