API 5L X65 / L450
API 5L X65ISO 3183 L450
Stock statusMill indent
Typical lead time4 - 8 weeks mill indent
The workhorse offshore and high-pressure grade. The higher yield allows a thinner wall at the same design pressure, cutting pipe weight on risers and long tie-backs, and X65 is the grade most often specified with sour service and HIC testing.
- PSL2 supply with controlled chemistry and impact testing
- Sour service variants to NACE MR0175 / ISO 15156 on request
- Bevelled ends, 3LPE / 3LPP coating and hydrotest reports arranged
- Third-party inspection and EN 10204 3.2 certification available
Available forms & sizes
| Form | Size range |
|---|---|
| Seamless Pipes & Tubes | 1/2" - 24" NB, SCH 20 - SCH 160 / XXS |
| Welded Pipes | 6" - 56" OD, ERW, EFW and LSAW, 4 - 25 mm wall |
| Flanges | 1/2" - 48", 150# - 2500#, WN / SO / blind |
| Fittings | 1/2" - 48" butt weld elbows, tees, reducers and caps |
Chemical composition (%)
| Element | Min | Max |
|---|---|---|
| C | - | 0.24 (PSL2 seamless) |
| Mn | - | 1.40 - 1.65 |
| P | - | 0.025 |
| S | - | 0.015 |
| CEpcm | - | 0.25 (sour service) |
Mechanical properties
| Property | Value | Unit |
|---|---|---|
| Yield Strength (0.5% EUL) | 450 - 600 | MPa |
| Tensile Strength | 535 - 760 | MPa |
| Yield / Tensile ratio | 0.93 max (PSL2) | - |
| Charpy V-notch | 27 J min at 0 C (average of 3) | J |
Physical properties
| Property | Value | Unit |
|---|---|---|
| Density | 7.85 | g/cm3 |
| Modulus of Elasticity | 210 | GPa |
Typical applications
Offshore risers and tie-backs
High pressure transmission trunk lines
Sour service flowlines with HIC testing
Subsea spools and jumpers
Frequently asked
[ 02 ] Other grades in OCTG & Line Pipe
API 5L X52 / L360
Mill indentAPI 5L X52ISO 3183 L360
The baseline transmission grade. X52 balances weldability against pressure rating, which is why it remains the default for gathering lines, utility piping and plant interconnects where wall thickness rather than yield strength drives the design.
4 forms available
API 5L X70 / L485
Mill indentAPI 5L X70ISO 3183 L485
High strength thermomechanically rolled line pipe for long distance, large diameter transmission. X70 is specified where the pipeline economics are driven by wall thickness and steel tonnage over hundreds of kilometres.
4 forms available