ASTM A249 TP321H stainless steel pipes are usually produced by cold rolling, cold drawing and other production processes, and undergo post-treatment processes such as heat treatment + pickling. SS 321H Welded Tube needs to undergo hydraulic pressure testing during the production process to ensure that there is no leakage or seepage under the specified pressure value.
ASTM A249 Stainless Steel 321H Cold Drawn Tube has a high resistance to intergranular corrosion and has good corrosion resistance to some organic and inorganic acids. The supplied stainless steel seamless pipes are tested for corrosion resistance according to the standard or mutually agreed corrosion method to ensure that there is no tendency of intergranular corrosion.
Because ASTM A249 TP321H boiler tubes have excellent corrosion resistance and mechanical properties, they are especially used for long-term operation in high temperature environments such as heat exchangers, boiler superheater pipes, heat exchanger pipes, steam pipes, etc.
Products Data
A249 Stainless Steel 321H Heat Exchanger Tube Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
| 321H | min. max |
0.04 0.10 |
2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 |
– | 9.0 12.0 |
– | Ti=4(C+N) 0.70 |
ASTM A249 TP321H Stainless Steel Welded Tube Physical Properties
| 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 | |||||
| 321H | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
Products display
ASTM A249 TP 321H Steel Boiler pipe
Why Choose GNEE
GNEE is a professional Chinese stainless steel pipe manufacturer and stainless steel pipe supplier, specializing in industrial stainless steel welded pipes and special alloy pipes, with an annual production capacity of up to 7000 tons.
The produced pipes comply with GB, ASTM/ASME, JIS, DIN, EN, GOST and ISO standards.
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