Overview
A213 TP321 is a specification of heat exchanger tubes that are made from the 321 austenitic stainless steel. The A213 specifies pipe products for heat exchangers in different material grades, both the ferritic and austenitic steels. A213 TP321 Material is special in that the composition includes titanium which reduces the density and therefore making it lightweight.
Like other austenitic grades, 321 and 347 have excellent forming and welding characteristics, which are readily brake or roll formed and have outstanding welding characteristics. Post-weld annealing is not required. They also have excellent toughness, even down to cryogenic temperatures. Grade 321 does not polish well, so is not recommended for decorative applications.
The addition of titanium also provides the ASTM A213 TP321 tubes with high corrosion resistance properties. The intergranular corrosion risk present in most high carbon steels is reduced due to the addition of titanium. The tube can last longer in high temperatures. Therefore it is used in heat exchangers and in super heaters. There are different types of these pipes such as the 321 Stainless Steel Flexible tube which is easy to install and to maintain. The application of the Type 321 steel tube can also be seen in boilers and in condensers.
Specification
ASTM A213/A213M-21a Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.
321 Stainless Steel Pipe & Tubes Specification | ASTM A269, ASTM A213, ASTM A312, ASME SA269, ASME SA213, ASME SA312 |
321 Stainless Steel Pipe & Tubes Grades | 202, 304, 304L, 304H, 304LN, 309S, 310S, 316, 316L, 316H, 316Ti, 316LN, 317L, 321, 321H, 347, 347H, 904L, SMO 254, ALLOY 254, 6MO, 6MOLY, UNS S31254 ETC. |
321 Stainless Steel Pipe & Tubes Type | Seamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold Finish |
321 Stainless Steel Pipe & Tubes Outer Diameter Size | Seamless - 1/2"NB TO 18"NB |
321 Stainless Steel Pipe & Tubes Wall Thickness | Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness) |
321 Stainless Steel Pipe & Tubes Length | 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size. |
321 Stainless Steel Pipe & Tubes Delivery Conditions | As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw |
321 Stainless Steel Pipe & Tubes Coating | Electropolish, Mechanical Polish, Satin Finish, Passivated |
321 Stainless Steel Pipe & Tubes Other Testing | Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiograph HIC Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc |
321 Stainless Steel Pipe & Tubes Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment |
321 Stainless Steel Pipe & Tubes Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
Chemical Composition
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
321 | min. | - | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 | - | 9.0 | 0.10 | Ti=5(C+N) |
321H | min. | 0.04 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 | - | 9.0 | - | Ti=4(C+N) |
Physical Properties
Grade | Density | Elastic Modulus | Mean Coefficient of | Thermal Conductivity | Specific Heat | Electrical Resistivity | |||
0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
Mechanical Properties
Grade | Tensile Strength | Yield Strength | Elongation | Hardness | |
Rockwell B | Brinell | ||||
321 | 515 | 205 | 40 | 95 | 217 |
321H | 515 | 205 | 40 | 95 | 217 |
Applications
1. Food preparation equipment particularly in chloride environments.
2. Laboratory benches & equipment.
3. Coastal architectural panelling, railings & trim.
4. Boat fittings.
5. Chemical containers, including for transport.
6. Heat Exchangers.
7. Woven or welded screens for mining, quarrying & water filtration.
8. Threaded fasteners.
9. Springs.
