ASTM A213 TP321 1.4541 Stainless Steel Seamless Bright Annealed Tube
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. YUHONG Group is a supplier of all kinds of stainless steel pipes. The A213 TP321 material is special in that the composition includes titanium which reduces the density of the ASTM A213 TP321 and therefore making it lightweight.
TP321 Tube Chemical Composition
| WEIGHT % | NI | CR | MN | C | SI | S | P |
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| MIN | 9.00 | 17.00 |
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| MAX | 12.00 | 19.00 | 2.00 | .080 | 1.00 | .030 | .045 |
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ASTM A213 TP321 Mechanical Properties:
| Density | 8.0 g/cm³ |
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength | Psi – 75000 , MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000 , MPa – 205 |
| Elongation | 35 % |
ASTM A213 Stainless Steel Tubes Outside Diameter and Wall Thickness Tolerance
| OD, mm | OD Tolerance |
|---|
| < 25.4 | +/- 0.10 |
| 25.4 – <= 38.1 | +/- 0.15 |
| > 38.1 -< 50.8 | +/- 0.20 |
| 50.8 -< 63.5 | +/- 0.25 |
| 63.5 -< 76.2 | +/- 0.30 |
| 76.2 – <= 101.6 | +/- 0.38 |
| > 101.6 – <= 190.5 | +0.38/-0.64 |
| > 190.5 – <= 228.6 | +0.38/-1.14 |
| OD, mm | WT Tolerance |
|---|
| <= 38.1 | +20%/-0 |
| > 38.1 | +22%/-0 |
ASTM A213 TP321 Stainless Steel Seamless Pipes Physical Properties
*Physical properties of 321 grade stainless steel in the annealed condition
| Grade | Density (kg/m³) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity (nΩ.m) |
| 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 |
Equivalent Material for 321 Grade Stainless Steel
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS |
| BS | En | No | Name |
| 321 | S32100 | 321S31 | 58B, 58C | 1.4541 | X6CrNiTi18-10 | 2337 | SUS 321 |
Applications:
-Food preparation equipment particularly in chloride environments
-Laboratory benches & equipment
-Coastal architectural panelling, railings & trim
-Boat fittings
-Chemical containers, including for transport
-Heat Exchangers
-Woven or welded screens for mining, quarrying & water filtration
-Threaded fasteners
-Springs
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