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Technical Specifications
Product Overview
Metallurgical Characteristics
P22 is a low-alloy chromium-molybdenum structural steel with a tempered bainitic microstructure optimized for high-temperature service. The controlled addition of chromium (1.9-2.6%) and molybdenum (0.87-1.13%) provides excellent creep resistance and thermal stability, while maintaining good weldability and formability for structural applications.
Heat Treatment Process
MetalZenith employs controlled normalization at 900-950°C followed by tempering at 700-750°C with precise cooling rates to achieve optimal microstructural stability. This heat treatment process ensures uniform mechanical properties and enhanced creep resistance throughout the material cross-section.
Manufacturing Process
Our advanced manufacturing process includes vacuum degassing, controlled rolling, and multi-stage heat treatment with continuous monitoring of temperature profiles. MetalZenith's quality control system ensures consistent chemical composition and mechanical properties through automated testing and real-time process adjustments.
Specialized Quality Testing
P22 steel undergoes comprehensive testing including creep rupture testing at service temperatures, stress relaxation testing, thermal fatigue evaluation, and hydrogen-induced cracking resistance testing. Our specialized testing protocols verify long-term performance under elevated temperature structural loading conditions.
Application Engineering Considerations
For power plant applications, P22 provides excellent steam oxidation resistance and dimensional stability. In petrochemical structures, the material offers superior resistance to hydrogen attack and thermal cycling. For heavy machinery applications, P22 delivers consistent performance under combined thermal and mechanical stresses, making it ideal for critical structural components in demanding industrial environments.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.05 - 0.15 |
| Manganese (Mn) | 0.30 - 0.60 |
| Silicon (Si) | 0.50 max |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Chromium (Cr) | 1.90 - 2.60 |
| Molybdenum (Mo) | 0.87 - 1.13 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 205 |
| Tensile Strength (MPa) | 415 - 585 |
| Elongation (%) | ≥ 20 |
| Impact Energy at 20°C (J) | ≥ 27 |
| Hardness (HB) | ≤ 192 |
| Creep Rupture Strength at 593°C (MPa) | ≥ 69 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 42.7 |
| Thermal Expansion (×10??/K) | 11.7 |
| Elastic Modulus (GPa) | 200 |
| Specific Heat (J/kg·K) | 460 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Bars, Forgings, Tubes |
| Thickness Range | 5 - 200mm |
| Width Range | 1000 - 3000mm |
| Length Range | 6000 - 12000mm |
| Standards Compliance | ASTM A387 Grade 22, ASME SA-387, EN 10028-2 |
| Heat Treatment Condition | Normalized and Tempered |
| Service Temperature Range | -29°C to 593°C |
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Our Advantages in Processing P22 Steel
Advanced Heat Treatment Technology
MetalZenith employs precise controlled cooling and tempering processes with real-time temperature monitoring to achieve optimal microstructural stability and enhanced creep resistance. Our advanced heat treatment ensures consistent mechanical properties and dimensional stability throughout the material thickness for critical structural applications.
Comprehensive High-Temperature Testing
MetalZenith conducts extensive testing including creep rupture testing, high-temperature tensile testing, stress relaxation testing, and thermal fatigue evaluation. Our specialized testing protocols ensure superior performance in elevated temperature structural applications with verified long-term reliability.
Custom Structural Solutions
MetalZenith provides comprehensive custom processing services including precision machining, welding preparation, and specialized heat treatment schedules. Our technical team offers expert consultation for structural design optimization and material selection to meet specific high-temperature application requirements.
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