Stainless steel grade · Austenitic

AISI 321 · EN 1.4541

Titanium-stabilised 304 that resists intergranular corrosion after welding and keeps its strength at high service temperatures.

Equivalents and designations

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

SystemDesignation
AISI / ASTMAISI 321
EN material number1.4541
EN steel name (DIN EN 10088)X6CrNiTi18-10
UNSS32100
JISSUS321
Look up other equivalents →

Chemical composition

C max.
≤ 0.08
Cr
17–19
Ni
9–12
Mo
—
Other
Ti 5×C – 0.70

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

Mechanical and physical properties

Structure
Austenitic
Rm (MPa)
515
Rp0.2 (MPa)
205
A (%)
40
PREN
17
Corrosion
Level 3 of 5
Weldability
Good
Magnetic
No
Density
7.93 g/cm³

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

Typical uses

  • Exhaust systems and manifolds
  • Expansion joints and furnace parts
  • Welded parts in the 450–850 °C range

Related grades

AISI 303AISI 304AISI 304LAISI 310SAISI 316AISI 316LAISI 316Ti

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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.