AISI 321 Bolting Products
AISI 321 is listed in the AUSTENITIC STAINLESS STEEL material family. The reference data below should be checked against the governing product specification, product form and delivery condition before selection or certification.
The reference chemistry table for AISI 321 lists Chromium (Cr): Corrosion-resistant alloying element; Nickel (Ni): Austenite stabilizer; Titanium (Ti): Stabilizes carbon against sensitization. Confirm exact limits and analysis tolerances against the governing standard and product form.
The mechanical-property table for AISI 321 lists Tensile Strength: Condition and product-form dependent —; Yield Strength: Condition and product-form dependent —; Elongation: Condition and product-form dependent %; Hardness: Grade and condition dependent —. These are reference entries; supplied condition, dimensions, test method and governing specification control the requirements, and the figures are not design allowables.
Werkstoff / EN cross-reference for AISI 321: 1.4541. This comparison does not guarantee interchangeability; confirm chemistry, product form and condition against the governing specification.
View Technical Information →Standard identification and material designation information for AISI 321.
The reference chemistry table lists Chromium (Cr): Corrosion-resistant alloying element; Nickel (Ni): Austenite stabilizer; Titanium (Ti): Stabilizes carbon against sensitization. Confirm the governing standard, product analysis tolerances and product form before ordering.
| Element / feature | Symbol | Grade information |
|---|---|---|
| Chromium | Cr | Corrosion-resistant alloying element |
| Nickel | Ni | Austenite stabilizer |
| Titanium | Ti | Stabilizes carbon against sensitization |
| Other elements | — | Limits controlled by applicable specification |
The table reports Tensile Strength: Condition and product-form dependent —; Yield Strength: Condition and product-form dependent —; Elongation: Condition and product-form dependent %; Hardness: Grade and condition dependent — as reference data for AISI 321. Actual requirements depend on condition, dimensions, test method and specification; these values are not design allowables.
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | Condition and product-form dependent | — |
| Yield Strength | Condition and product-form dependent | — |
| Elongation | Condition and product-form dependent | % |
| Hardness | Grade and condition dependent | — |
AISI 321 is a titanium-stabilized austenitic stainless steel based on the 18Cr-8Ni family, intended to improve resistance to intergranular attack after exposure to elevated temperatures. Key performance features vary by grade and condition.
AISI 321 is selected when titanium stabilized is important in service.
The grade provides good high-temperature service, subject to product form and specification.
This characteristic supports use of AISI 321 in appropriate industrial environments.
Performance depends on the certified material condition and governing specification.
AISI 321 is selected for bolting and engineered components where its corrosion, temperature or fabrication characteristics match the service environment.
Typical applications include exhaust systems. Confirm suitability against the project specification, temperature, media and product condition.
Typical applications include high-temperature process equipment. Confirm suitability against the project specification, temperature, media and product condition.
Typical applications include heat exchangers. Confirm suitability against the project specification, temperature, media and product condition.
Typical applications include welded pressure equipment. Confirm suitability against the project specification, temperature, media and product condition.
Consider corrosion environment, temperature, product form, fastener size, heat treatment and the governing specification when selecting AISI 321.
Corrosion Resistance: AISI 321 is intended for corrosion-resistant service, but actual performance depends on the environment, concentration, temperature and surface condition.
Mechanical Requirements: use certified mechanical properties for the exact grade, product form and condition; do not substitute generic family values for design allowables.
The commonly listed Werkstoff / EN cross-reference for AISI 321 is 1.4541. Treat this as a grade comparison, not a guarantee of interchangeability. Verify chemistry, product form, condition and governing specification against the supplier certificate before substitution.
Typical applications include exhaust systems, high-temperature process equipment, heat exchangers. Suitability depends on service environment and product condition.
Yes. Tensile strength, yield strength, elongation and hardness vary with product form, heat treatment, cold work, section size and the governing specification.
Our engineering team can help you select suitable materials based on operating temperature, pressure and service conditions.