EN 1.4541
(commonly known as AISI 321
or UNS S32100
) is a titanium-stabilized austenitic stainless steel. It offers excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range of 450°C to 850°C (842°F to 1562°F)
.
Key Characteristics
- Titanium Stabilization:
The addition of titanium prevents harmful carbide precipitation during welding and high-temperature services.
- High Heat Resistance:
Demonstrates superior creep resistance and stress-rupture properties compared to Grade 304.
- Excellent Weldability:
Can be easily welded using most standard fusion welding techniques without post-weld annealing.
- Superb Mechanical Properties:
Maintains high toughness and strength even in cryogenic temperatures.
Cross-Reference & Equivalent Standards
| EN Standard
|
UNS Number
|
AISI / ASTM
|
JIS (Japan)
|
KS (Korea)
|
| 1.4541 (X6CrNiTi18-10)
|
S32100
|
321
|
SUS321
|
STS321
|
Typical Applications
- Aerospace components and aircraft exhaust manifolds
- Automotive exhaust systems and mufflers
- Chemical processing equipment and pressure vessels
- Heat exchangers, boiler tubes, and superheater elements
- Thermal oxidizers and high-temperature gaskets
Chemical Composition (Weight %)
- Cr (Chromium):
17.0 - 19.0%
- Ni (Nickel):
9.0 - 12.0%
- Ti (Titanium):
5 × (C+N) ≤ 0.70%
- C (Carbon):
0.08% max
- Mn (Manganese):
2.00% max
- Si (Silicon):
1.00% max
- P (Phosphorus):
0.045% max
- S (Sulfur):
0.015% max
Mechanical Properties (At Room Temperature)
- Tensile Strength:
≥ 500 - 700 MPa
- Yield Strength (0.2% Offset):
≥ 200 MPa
- Elongation (A₅):
≥ 40%
Count : 57
