Grade guide · MS / CS & Alloy Steel
SA-387 Gr 11 Cl 2: properties, composition, uses and standards
Short answer
SA-387 Gr 11 Cl 2 is a chrome-moly pressure-vessel plate, chosen for hot, high-pressure reactors and heat exchangers., density 7.85 g/cm³.
What is SA-387 Gr 11 Cl 2?
SA-387 Gr 11 Cl 2 is a chrome-moly pressure-vessel plate. Engineers choose it for hot, high-pressure reactors and heat exchangers. It is also known as ASTM A387 Gr 11 Cl 2, 1¼Cr-½Mo plate, Chrome-moly plate.
- Designation
- SA-387 Gr 11 Cl 2
- Also called
- ASTM A387 Gr 11 Cl 2 · 1¼Cr-½Mo plate · Chrome-moly plate
- Standard
- ASTM A387 Grade 11
- Density
- 7.85 g/cm³
- Melting range
- 1420 – 1530 °C
- Magnetic
- Magnetic
Chemical composition
| Element | Weight % |
|---|---|
| Chromium | 1.00 – 1.50 |
| Molybdenum | 0.45 – 0.65 |
| Carbon | 0.05 – 0.17 |
| Manganese | 0.40 – 0.65 |
| Silicon | 0.50 – 0.80 |
| Phosphorus | 0.025 max |
| Sulphur | 0.025 max |
Per ASTM A387 Grade 11.
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | 515 – 690 MPa · 75 – 100 ksi |
| Yield strength | 310 MPa · 45 ksi |
| Elongation (50 mm) | 22% |
Class 2, minimum values. Values for pipe, bar and forgings differ slightly — see the product standard.
Where SA-387 Gr 11 Cl 2 is used
- Refineries. Hydroprocessing reactors. Industry →
- Power. Boiler and heater components. Industry →
Welding 387-11
The matching filler is ER80S-B2 / E8018-B2. Preheat and PWHT required.
SA-387 Gr 11 Cl 2 standards by product
| Product | Standard |
|---|---|
| SA-387 Gr 11 Cl 2 plate | ASTM A387 Gr 11 Cl 2 · ASME SA-387 |
Buying SA-387 Gr 11 Cl 2: what to specify
- The product standard and the UNS or designation — for example ASTM A387 Gr 11 Cl 2 · ASME SA-387.
- Size, thickness or schedule, and quantity in pieces and kg or metres.
- Heat-treatment condition where the standard offers a choice.
- Certificate: EN 10204 3.1 as standard, 3.2 if a third party must witness.