17-4 PH (630) — Machining & Properties
Typical properties, what 17-4 PH (630) is like on a machine tool, what it gets used for, and the tolerance and finishes we hold on it — from a shop that actually machines it, not a datasheet aggregator. Every figure here drives our own calculators.
Machining 17-4 PH (630)
Machinability is rated moderate — machinable without drama, but it rewards proper tooling, feeds and speeds — cycle times sit above the easy-cutting grades. Austenitic grades (303, 304, 316) work-harden during cutting. Sharp tooling, correct feeds and speeds, and no dwelling are essential. Martensitic and PH grades should be machined in the annealed condition where possible, with final heat treatment applied post-machining to minimise distortion.
Our standard achievable tolerance on 17-4 PH (630) is ±0.010mm under normal conditions, with tighter tolerances on critical features agreed at quotation. Standard finishes: Passivation, hard chrome. Full material traceability with MTR and CoC documentation on every order.
Typical applications
Aerospace fittings, high-strength valves, marine hardware.
Use 17-4 PH (630) in our free tools
Other stainless steel grades we machine: 303 · 304 / 304L · 316 / 316L · 15-5 PH — all 50 grades.
17-4 PH (630) — FAQ
What is the density of 17-4 PH (630)?
7.78 g/cm³ (typical). That is 7780 kg/m³ — our metal weight calculator uses exactly this figure for 17-4 PH (630).
What is the tensile strength of 17-4 PH (630)?
Typically 1310 MPa in the heat-treated condition stated. Treat it as a typical value, not a specification — the Material Test Report supplied with your order states the actual certified figures for the batch.
Is 17-4 PH (630) easy to machine?
Its machinability is rated moderate — machinable without drama, but it rewards proper tooling, feeds and speeds — cycle times sit above the easy-cutting grades.
What is 17-4 PH (630) used for?
Typical applications: Aerospace fittings, high-strength valves, marine hardware.
What tolerance can be held when machining 17-4 PH (630)?
Our standard achievable tolerance on 17-4 PH (630) is ±0.010mm under normal conditions (ISO 2768-f general tolerancing). Tighter tolerances on critical features can be agreed at quotation for specific geometries.
Can Dalloway machine 17-4 PH (630)?
Yes — we machine 17-4 PH (630) in-house on 3, 4 and 5-axis milling and CNC turning, from single prototypes to production, with MTR and CoC documentation standard. Typical finishes: Passivation, hard chrome.
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