ASTM A312 UNS S32100 stainless steel industrial pipe
ASTM A312 UNS S32100 (Grade 321) is a titanium-stabilized, austenitic stainless steel industrial pipe that offers excellent resistance to intergranular corrosion after high-temperature exposure and maintains good strength up to 816°C (1500°F). This grade of pipe exhibits high creep strength, oxidation resistance, and good low-temperature toughness, making it suitable for high-temperature and corrosive applications, including those in the petrochemical, power generation, and aerospace sectors. This pipe conforms to ASTM A312 and is available in both seamless and welded forms.
What is the service temperature range for Type 321 stainless steel?
Type 321 stainless steel is generally used in heavy-duty welding equipment operating between 800 and 1500°F (427 and 816°C), or with slow cooling within this temperature range. Experience with a wide range of service conditions provides sufficient data to roughly predict the likelihood of intergranular adhesion in most applications.
Stainless Steel 321 Pipe Specification
| Standard Specification | ASTM A 312/ ASME SA 312/ EN10216-5 |
| Size | ½ to 6 Inch NB |
| Wall Thickness | 0.1 To 60 mm |
| Manufacturing Technology | Hot / Cold Formed |
| Standard | DIN, JIS, AMS, GB, AISI, ASME, ASTM, EN, GOST |
| Technique | Cold Rolled Hot Rolled |
| Surface Finish | Bright, Cold Finish, Annealing, Polished, Pickling |
| Schedule Pipe Thickness Range | SCH 80, SCH 40, SCH XXS, SCH 5, SCH 80S, SCH10, SCH XS, SCH 160 Supplier in Mumbai |
| Manufacturing Shapes | Round, Rectangle, Square, Box Section |
| Types | Seamless, ERW, Welded, EFW |
Chemical Composition of ASTM A312 TP321 Stainless Steel Seamless Pipes
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
| 321 | min. max |
- 0.08 |
2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 |
- | 9.0 12.0 |
0.10 | Ti=5(C+N) 0.70 |
Mechanical Properties of ASTM A312 TP321 Stainless Steel Seamless Pipes
| Grade |
Tensile Strength |
Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321 | 515 | 205 | 40 | 95 | 217 |
Physical Properties of ASTM A312 TP321 Stainless Steel Seamless Pipes
| 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 |
Key Characteristics
Stability: The addition of titanium prevents carbide precipitation, which causes intergranular corrosion in other austenitic stainless steels at high temperatures.
Corrosion Resistance: Excellent resistance to intergranular corrosion even at high temperatures (427-816°C / 800-1500°F) and good general corrosion resistance.
High-Temperature Performance: High creep strength and stress-rupture properties surpass those of alloys such as 304 and 304L.
Mechanical Properties: Not hardenable by heat treatment, but can be strengthened by cold working. Demonstrates good toughness at low temperatures.
Gnee Steel specializes in the production and sale of a wide range of stainless steel products, including 304, 316, 321, 904, 904L, 2205 Duplex, 2205 Duplex, and 316L stainless steel. Gnee Steel's products are widely used in the kitchen, aerospace, chemical, power, automotive, and nuclear energy sectors. We also provide custom stainless steel solutions tailored to customer needs. For stainless steel pricing or custom alloy solutions, please email ru@gneesteelgroup.com for a quote.
