ASTM A387 Grade 11 Class 1 steel plate is a chromium-molybdenum (Cr-Mo) alloy steel designed for use in pressure vessels, boilers, and high-temperature service applications.
ASTM A387 Grade 11 Class 1 steel plate
It is widely used in industries such as oil & gas, petrochemical, and power generation, where materials must withstand elevated temperatures and high pressure.
This grade is known for its excellent heat resistance, corrosion resistance, and mechanical strength, making it a reliable choice for critical industrial equipment.
Chemical Composition of ASTM A387 Grade 11 Class 1
The performance of Grade 11 steel is achieved through its chromium and molybdenum content, which enhance heat resistance and strength.
| Element | C | Mn | Si | Cr | Mo | P | S |
|---|---|---|---|---|---|---|---|
| Content (%) | 0.05–0.17 | 0.40–0.65 | 0.50–0.80 | 1.00–1.50 | 0.45–0.65 | ≤0.035 | ≤0.035 |
Mechanical Properties of ASTM A387 Grade 11 Class 1
ASTM A387 Grade 11 offers strong mechanical performance, especially under high-temperature conditions:
| Property | Value |
|---|---|
| Yield Strength | ≥240 MPa |
| Tensile Strength | 415–585 MPa |
| Elongation | ≥22% |
These properties ensure the material can maintain structural stability under pressure and heat, making it ideal for pressure vessel applications.
Key Features and Advantages of ASTM A387 Grade 11 Class 1
ASTM A387 Grade 11 steel plate provides several important benefits:
Excellent High-Temperature Resistance
Suitable for continuous service in elevated temperature environments
Good Corrosion and Oxidation Resistance
Performs well in harsh industrial conditions
Strong Creep Resistance
Maintains strength over long periods under stress and heat
Good Weldability
Can be fabricated using standard welding methods
Reliable Mechanical Strength
Ensures safety in pressure vessel applications
Typical Applications of ASTM A387 Grade 11 Class 1
ASTM A387 Grade 11 steel plate is widely used in:
| Industry | Application |
|---|---|
| Oil & Gas | Pressure vessels, separators |
| Petrochemical | Reactors, heat exchangers |
| Power Plants | Boilers, steam drums |
| Refining | High-temperature processing equipment |
These applications require materials that can withstand high temperature, pressure, and corrosive environments, which Grade 11 is specifically designed for.
Heat Treatment and Delivery Condition of ASTM A387 Grade 11 Class 1
| Condition | Description |
|---|---|
| Normalized and Tempered (N&T) | Normalized followed by tempering at a minimum temperature of 620 °C (1150 °F). Improves toughness and refines grain structure, relieves internal residual stress. |
| Quenched & Tempered (Q&T) | Austenitized, liquid‑quenched, then tempered at a minimum temperature of 620 °C (1150 °F). Enhances strength, impact toughness and service durability. |
ASTM A387 Grade 11 is typically supplied in normalized or quenched and tempered condition to ensure optimal performance.
Why Choose ASTM A387 Grade 11 Class 1 Steel Plate
- Designed for high-temperature pressure vessel applications
- Provides long-term reliability under thermal stress
- Widely accepted in international engineering standards
- Offers a strong balance of performance and cost
ASTM A387 Grade 11 steel plate is a high-performance Cr-Mo alloy steel ideal for demanding applications involving heat, pressure, and corrosion. Its combination of mechanical strength, thermal resistance, and durability makes it a trusted material in the energy and industrial sectors.
If you are sourcing ASTM A387 Grade 11 steel plates, provide your required specifications such as thickness, width, quantity, and application.
A detailed quotation and technical support can be arranged to meet your project requirements.
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Photos of ASTM A387 Grade 11 Class 1 steel plate
