API 5L X56 PLATE / SHEET / COIL
API 5L X56 plates, sheets, and coils are high-strength carbon steel products extensively used in oil & gas pipelines, pressure vessels, and structural applications. Also known as L390, this grade offers a minimum yield strength of 56 Ksi (390 MPa), providing excellent strength, toughness, and weldability for high-pressure and demanding service conditions.
Manufactured in accordance with API 5L and ISO 3183 standards, API 5L X56 plates and coils deliver consistent mechanical properties and superior formability. These products are suitable for both onshore and offshore applications, including environments subjected to high pressure and severe mechanical stress.
API 5L X56 plates, sheets, and coils are available in a wide range of thicknesses, widths, and surface finishes to meet diverse fabrication and project requirements. They are widely used for pipe manufacturing, structural fabrication, storage tanks, and heavy industrial engineering projects.
Revinox is a reliable supplier of API 5L X56 plates, sheets, and coils in India, supplying products that comply with international quality standards and offer excellent dimensional accuracy, durability, and long service life.
API 5L X56 Plate, API 5L X56 Sheet, API 5L X56 Coil, API 5L X56 Plate Specifications, API 5L X56 Plate Dimensions, API 5L X56 Coil Supplier, API 5L X56 Plate Manufacturer in India
Applications of API 5L X56 Plate, Sheet & Coil
| ● Oil & Gas Transmission Pipelines |
| ● Pressure Vessels & Storage Tanks |
| ● Petrochemical & Refinery Applications |
| ● Heavy Structural & Industrial Fabrication |
Specification Table of API 5L X56 Plate / Sheet / Coil
| Specification | Details | |
|---|---|---|
| Product Specification | API 5L, PSL-1, PSL-2 | |
| Thickness | 3 mm to 150 mm (Custom thickness available) | |
| Width | 1000 mm to 3000 mm | |
| Form | Plate, Sheet, Coil | |
| Grade | API 5L X56 / L390 | |
Delivery Condition
| PSL | Delivery Condition | Product Grade |
|---|---|---|
| PSL 1 | As-rolled, normalized | X56 |
| PSL 2 | Normalized, normalized & tempered | X56N |
| Quenched and tempered | X56Q | |
| Thermomechanically rolled | X56M |
Process of Manufacturing
| Product Form | Manufacturing Process | PSL 1 | PSL 2 |
|---|---|---|---|
| Plate | Hot Rolled (HR) | ✔ | ✔ |
| Plate | Controlled Rolled (CR) | ✔ | ✔ |
| Plate | Thermo-Mechanical Controlled Process (TMCP) | ✔ | ✔ |
| Sheet | Hot Rolled Pickled & Oiled (HRPO) | ✔ | ✔ |
| Coil | Hot Rolled Coil (HRC) | ✔ | ✔ |
| Heat treatment such as normalizing, quenching & tempering, or TMCP is applied as per API 5L PSL 1 or PSL 2 requirements to achieve the specified mechanical properties. | |||
Chemical Composition Table For API 5L X56 Plate / Sheet / Coil
| Steel Grade | Mass fraction, % (Heat & Product Analysis) | ||||||
|---|---|---|---|---|---|---|---|
| C | Mn | P | S | V | Nb | Ti | |
| max | max | max | max | max | max | max | |
| API 5L X56 Plate / Sheet / Coil (PSL 1) | |||||||
| X56 | 0.28 | 1.45 | 0.030 | 0.030 | d | d | d |
|
a. Cu ≤ 0.50%, Ni ≤ 0.50%, Cr ≤ 0.50%, Mo ≤ 0.15% b. Mn increase permitted with reduced carbon as per API 5L limits c. Nb + V ≤ 0.06% unless otherwise agreed d. Nb + V + Ti ≤ 0.15% e. No deliberate addition of Boron; residual B ≤ 0.001% |
|||||||
Chemical Composition Table for API 5L X56 Plate / Sheet / Coil
| Steel Grade | Mass fraction, % (Heat & Product Analysis) | Carbon Equivalent | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | V | Nb | Ti | Other | CE IIW | CE Pcm | |||||||||||
| max | max | max | max | max | max | max | max | max | max | ||||||||||||
| API 5L X56 Plate / Sheet / Coil (PSL 2) | |||||||||||||||||||||
| X56N | 0.22 | 0.45 | 1.65 | 0.025 | 0.015 | 0.10 | 0.05 | 0.04 | d,e,l | 0.44 | 0.25 | ||||||||||
| X56Q | 0.20 | 0.45 | 1.65 | 0.025 | 0.015 | 0.08 | 0.05 | 0.04 | e,l | 0.44 | 0.25 | ||||||||||
| X56M | 0.22 | 0.45 | 1.65 | 0.025 | 0.015 | d | d | d | e,l | 0.44 | 0.25 | ||||||||||
|
a. Carbon equivalent limits apply as per API 5L PSL 2
requirements b. Mn increase permitted with reduced carbon as per API 5L limits c. Nb + V ≤ 0.06% unless otherwise agreed d. Nb + V + Ti ≤ 0.15% e. Cu ≤ 0.50%, Ni ≤ 0.30%, Cr ≤ 0.30%, Mo ≤ 0.15% unless otherwise agreed l. No intentional addition of Boron; residual B ≤ 0.001% |
|||||||||||||||||||||
Tensile and Yield Strength – API 5L X56 Plate / Sheet / Coil (PSL 1 & PSL 2)
Tensile & Yield Strength – API 5L X56 Plate / Sheet / Coil
| Steel Grade | Yield Strength | Tensile Strength | Elongation (%) | ||
|---|---|---|---|---|---|
| Min (MPa) | Min (PSI) | Min (MPa) | Min (PSI) | ||
| X56 | 390 | 56,600 | 490 | 71,000 | As per API 5L |
Notes:
• Mechanical properties apply to API 5L X56 plates, sheets, and coils.
• Elongation values shall be calculated as per API 5L specification.
• Material is suitable for forming, welding, and high-pressure applications.
Dimensional Tolerances – API 5L X56 Plate / Sheet / Coil
| Parameter | Tolerance |
|---|---|
| Thickness | ± 10% of specified thickness |
| Width | ± 5 mm |
| Length | −0 / +10 mm |
| Flatness | As per mill standard / agreement |
Notes:
• Applicable to API 5L X56 plates, sheets, and coils only.
• OD, out-of-roundness, and wall thickness tolerances are not applicable to flat
products.
• Special tolerances can be supplied on request.