Overview
Grade 321 stainless steel (1.4541) is a heat resistant grade supplied into numerous industry sectors. The key property of this grade is the added titanium content (5 x C%) stabilising the material and making its resistance to carbide precipitation when exposed to high temperatures and resistance to oxidation its main characteristics. Whilst retaining good strength and corrosion resistance when exposed to high temperatures, this grade of stainless steel like most austenitic grades will also maintain its strength and toughness at sub-zero temperatures, making this an excellent choice for various applications ranging from oil refinery equipment to automotive exhaust systems. This heat resistant grade of stainless steel has a maximum dry air service temperature of 850ºC.
Form of Supply
| * Sheet | * Plate | * Round Bar | * Wire | * Tube & Pipe |
Nationwide Stainless are one of the UK’s largest independent Stockholders and Processors of 321 stainless steel (1.4541). With a large stock range and excellent processing capabilities we are able to supply most projects whether stock items or custom made products. We can offer; Stock size plate & sheet, Stock length round bar, Cut to size plate & sheet, Cut to length round bar, Cold forming of plate & sheet and round bar, And any other additional machining requirements that may be necessary. Please send any enquiries to sales@nationwidestainless.co.uk
Applications
| * Exhaust Systems | * Manifolds | * Chemical Plant |
| * Heat Exchangers | * Piping | * Furnace Parts |
| * Chimney and Stack Liners | * Storage Tanks | * Bellows |
Corrosion Resistance
321 stainless steel (1.4541) has excellent corrosion resistance at normal temperatures but is primarily designed to perform at elevated temperatures. The added titanium content of minimum five times the carbon % content (max 0.7%) means that grade 321 also possesses good creep strength, good resistance to chromium carbide precipitation and is very resistant to oxidation and intergranular corrosion up to 850ºC in dry air service conditions. Other corrosive compounds in the hot atmosphere such as water and sulphur compounds will significantly reduce the maximum service temperature. The overall characteristics of this material make it an excellent, relatively low cost choice for many applications.
Typical Analysis
| 321 | Cr% | Ni% | Mo% | Ti% | C% | Cu% | Mn% | Si% | N% |
| MIN | 17.0 | 9.0 | - | (5xC+N) | - | - | - | 0.25 | - |
| MAX | 19.0 | 12.0 | 0.75 | 0.7 | 0.08 | 0.75 | 2.0 | 1.0 | 0.1 |
Mechanical Properties
Properties quoted below are guideline figures only and should not be used for any design purposes.
| - | 0.2% Proof (Nmm²) | UTS (Nmm²) | Elongation (%) |
| 321 (1.4541) | 200 - 300 | 500 - 700 | 40 |
Related Specs & Trade Names
1.4541, Grade 321, Alloy 321, AISI 321, TYPE 321, UNS S32100, X6CrNiTi18-10, ASTM A240, 321H, 321 Stainless, T.321, SS321, 321SS, 321
