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321 Stainless Tubing
321 stainless steel pipe is an austenitic stainless steel stabilized grade formed by adding titanium (Ti) element to 304 stainless steel. The addition of titanium significantly enhances its resistance to intergranular corrosion within the sensitization temperature range, especially excelling in welding or high-temperature service environments. The core characteristics and design purpose of 321 stainless steel pipe:
1. The stabilizing effect of titanium. Titanium preferentially combines with carbon to form stable titanium carbide (TiC), preventing carbon from combining with chromium to form chromium carbide (Cr₂₃C6), and avoiding the risk of intergranular corrosion caused by chromium depletion during welding or at high temperatures (450-850°C). Compared with 304, 304 relies on ultra-low carbon (304L) for anti-sensitization, while 321 is stabilized with titanium, achieving a balance between strength and corrosion resistance.
2. Enhanced high-temperature performance, oxidation resistance, can be used intermittently at 800-900°C and continuously at ≤700°C (superior to 304), high-temperature strength, titanium enhances grain boundary stability, slows down high-temperature creep, suitable for thermal cycling components.
The 321 stainless steel pipe complies with the standard ASTM A213/A312/A269. The core value of 321 stainless steel pipes lies in:
1. Welding safety - Titanium stabilization solves the problem of intergranular corrosion after welding;
2. High-temperature service stability - Its oxidation resistance below 800°C is superior to that of 304.
It is not suitable for chlorine-containing media, strong reducing acids, and scenarios with high-intensity cold working requirements.
Our feature is that any outer diameter and wall thickness can be customized.
|
Grade |
Chemical composition (mass fraction) % |
|||||||
|
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Ti |
|
|
321 |
≤0.08 |
≤1.0 |
≤2.0 |
≤0.045 |
≤0.03 |
9.0-12.0 |
17.0-19.0 |
5C-0.7 |
- Outer diameter: 1/4" to 26"
- Wall thickness: SCH10S, SCH40S, SCH80S and SCH160S
Boilers, heat exchangers, superheater pipes, engine exhaust pipes, mufflers, hot air pipes, aircraft engine components, high-temperature chemical containers and pipes, etc.
With plastic cap to protect both ends Plastic bag wrapped outside pipe Woven bag wrapped outside pipe All our products are packed, stored, transported according to the international regulation.
The tubes are wrapped with anti-rust paper and steel rings to prevent damage. Identification labels are tagged according to standard specification or customer's instructions. Special packing is available as per customer's requirement.
Plus, ply wooden box are available for special protection. Other kinds of packing can be offered if request.
Q: What is your term of payment?
A: 30% down payment before producing and 70% balance payment before shipping.
Q: How long is your delivery time?
A: The general delivery time is 30-45 days after receiving your order confirmation. Anther, if we have the goods in stock, it will only take 2-3 days.
Q: Do you provide sample? Is it free?
A: If the sample is low value, we will provide the free sample with freight collect. But for some high value samples, we need to collect the sample charge.
https://www.stainlesspipepro.com/