EN8 (080M40) — Machining & Properties
Typical properties, what EN8 (080M40) 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 EN8 (080M40)
Machinability is rated good — a well-behaved material to machine with correctly chosen tooling and parameters. Tool and die steels (H13, D2, M2) are typically rough-machined in the annealed condition, hardened and tempered to working hardness, then finish ground or EDM’d to final dimension. Engaging us early in your design allows the sequence to be optimised for minimum distortion.
Our standard achievable tolerance on EN8 (080M40) is ±0.020mm under normal conditions, with tighter tolerances on critical features agreed at quotation. Standard finishes: Black oxide, zinc plate, powder coat. Full material traceability with MTR and CoC documentation on every order.
Typical applications
Shafts, keys, couplings, general engineering, automotive.
Use EN8 (080M40) in our free tools
Other carbon & alloy steel grades we machine: EN3 (070M20) · EN19 (709M40) · EN24 (817M40) · H13 (Hot Work) — all 50 grades.
EN8 (080M40) — FAQ
What is the density of EN8 (080M40)?
7.85 g/cm³ (typical). That is 7850 kg/m³ — our metal weight calculator uses exactly this figure for EN8 (080M40).
What is the tensile strength of EN8 (080M40)?
Typically 620 MPa. 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 EN8 (080M40) easy to machine?
Its machinability is rated good — a well-behaved material to machine with correctly chosen tooling and parameters.
What is EN8 (080M40) used for?
Typical applications: Shafts, keys, couplings, general engineering, automotive.
What tolerance can be held when machining EN8 (080M40)?
Our standard achievable tolerance on EN8 (080M40) is ±0.020mm under normal conditions (ISO 2768-f general tolerancing). Tighter tolerances on critical features can be agreed at quotation for specific geometries.
Can Dalloway machine EN8 (080M40)?
Yes — we machine EN8 (080M40) 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: Black oxide, zinc plate, powder coat.
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