Stainless steel grade · Austenitic

AISI 204Cu

Low-nickel 200-series grade with added copper, for good cold forming where corrosion demands are modest.

Equivalents and designations

The same grade is named differently in each standard. Use the table to check a match.

SystemDesignation
AISI / ASTMAISI 204Cu
EN material number—
EN steel name (DIN EN 10088)—
UNSS20430
JIS—
Look up other equivalents →

Chemical composition

C max.
≤ 0.15
Cr
15–17
Ni
1.5–3.5
Mo
—
Other
Mn 6.5–9; Cu 2–4

Typical values, wt %, per EN 10088-2 and ASTM A240.

Mechanical and physical properties

Structure
Austenitic
Rm (MPa)
—
Rp0.2 (MPa)
—
A (%)
—
PREN
—
Corrosion
Level 2 of 5
Weldability
Good
Magnetic
Slightly
Density
7.93 g/cm³

ASTM A240 minimums for annealed material; a dash means the value depends on product form.

Typical uses

  • Kitchenware and sinks
  • Cold-formed parts
  • Applications with modest corrosion demands

Related grades

Need AISI 204Cu?

Tell us the form, dimensions and quantity. We send a quote with an EN 10204 3.1 certificate on request.

Request a quote

The data is for guidance and does not replace the heat certificate. The binding values are those of the standard and the manufacturer's certificate.