### 1. What is the temperature range for A335 P11?
A335 P11 is a chromium-molybdenum alloy steel pipe designed for high-temperature service. While the exact temperature range for P11 is not explicitly stated in the search results, ASTM A335 P-grade pipes (including P11) are generally used in environments with temperatures ranging from **540°C to 750°C (1000°F to 1380°F)** for high-pressure and high-temperature applications such as power plants and petrochemical industries.
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### 2. What is the hardness of ASTM A335?
The hardness of ASTM A335 pipes varies depending on the grade. For **A335 P22**, the typical hardness ranges between **140 to 200 HB (Brinell Hardness)**. However, specific hardness values for other grades (e.g., P5, P9, P91) are not provided in the search results.
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### 3. What is P22 material?
**A335 P22** is a **chromium-molybdenum (Cr-Mo) alloy steel** used for high-temperature and high-pressure applications. Its key characteristics include:
- **Chemical Composition**:
- C: 0.05–0.15%
- Cr: 1.9–2.6%
- Mo: 0.87–1.13%
- Mn: 0.3–0.6%
- Si: ≤0.5%
- P, S: ≤0.025%.
- **Equivalent Standards**:
- Similar to **German 10CrMo910**.
- **Applications**:
- Power plant boilers, superheaters, steam pipelines, and petrochemical equipment operating at **540–750°C**.
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### 4. What are the properties of ASTM A335 P22?
The key properties of **ASTM A335 P22** include:
- **Mechanical Properties**:
- Tensile Strength: ≥415 MPa (60 ksi)
- Yield Strength: ≥205 MPa (30 ksi)
- Elongation: ≥30%.
- **High-Temperature Performance**:
- Retains strength and oxidation resistance up to **600°C**.
- **Corrosion Resistance**:
- Good resistance to oxidation and sulfur corrosion due to Cr-Mo content.
- **Weldability & Fabrication**:
- Requires preheating and post-weld heat treatment to avoid cracking.
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### 5. What is the specification of A335 P5 pipe?
**ASTM A335 P5** is a **Cr5-Mo alloy steel pipe** with the following specifications:
- **Chemical Composition**:
- C: ≤0.15%
- Cr: 4.0–6.0%
- Mo: 0.45–0.65%
- Mn: 0.3–0.6%
- Si: ≤0.5%
- P, S: ≤0.025%.
- **Applications**:
- Used in **petrochemical refineries, high-temperature sulfur corrosion environments (288–550°C), and power plants**.
- **Equivalent Material**:
- Similar to **1Cr5Mo in Chinese standards**.
