1. **What is SA213 T11 material?**
SA213 T11 is a chromium-molybdenum ferritic alloy steel used for boiler tubes, superheaters, and heat exchangers. It offers good creep strength and oxidation resistance at elevated temperatures.
2. **What is the temperature range for SA213 T12?**
SA213 T12 is typically used in temperatures up to **540°C (1000°F)** for continuous service, with higher short-term tolerance depending on pressure conditions.
3. **Is SA213 stainless steel?**
SA213 includes both **ferritic alloy steels (e.g., T11, T12, T22)** and **austenitic stainless steels (e.g., TP304, TP321)**. So, some grades under SA213 are stainless steel, while others are not.
4. **What is the composition of SA213 T92 material?**
SA213 T92 composition (wt%):
- **Carbon (C):** 0.07–0.13
- **Manganese (Mn):** 0.30–0.60
- **Silicon (Si):** ≤0.50
- **Chromium (Cr):** 8.50–9.50
- **Molybdenum (Mo):** 0.30–0.60
- **Vanadium (V):** 0.15–0.25
- **Niobium (Nb):** 0.04–0.09
- **Nitrogen (N):** 0.03–0.07
- **Tungsten (W):** 1.50–2.00
- **Boron (B):** 0.001–0.006
- **Iron (Fe):** Balance
5. **What is the composition of SA213 TP321?**
SA213 TP321 composition (wt%):
- **Carbon (C):** ≤0.08
- **Manganese (Mn):** ≤2.00
- **Silicon (Si):** ≤0.75
- **Chromium (Cr):** 17.0–19.0
- **Nickel (Ni):** 9.0–12.0
- **Titanium (Ti):** ≥5×C (min. 0.10)
- **Phosphorus (P):** ≤0.045
- **Sulfur (S):** ≤0.030
- **Iron (Fe):** Balance
TP321 is an **austenitic stainless steel** stabilized with titanium to resist carbide precipitation.
