API SPEC 5L L360 - PSL1 Introduce
API SPEC 5L L360 - PSL1 is a steel pipe specification for pipeline transportation, published by the American Petroleum Institute (API). API SPEC 5L specifies a range of requirements, including chemical composition, mechanical properties, dimensions, and physical characteristics of steel pipes. These requirements are designed to ensure that the steel pipes have sufficient strength, toughness, and corrosion resistance to meet the demands of various environments.
Smelting temperature:1594°C - 1279°C
Application:Line pipe
API SPEC 5L L360 - PSL1 Material Chemical Composition
The chemical composition of the API SPEC 5L L360 - PSL1 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Carbon (C) | - | 0.2600 |
| Carbon (C) | - | 0.2800 |
| Manganese (Mn) | - | 1.4000 |
| PhOsphorus (P) | - | 0.0300 |
| Sulfur (S) | - | 0.0300 |
| Nickel (Ni) | - | 0.5000 |
| Chromium (Cr) | - | 0.5000 |
| Molybdenum (Mo) | - | 0.1500 |
| Copper (Cu) | - | 0.5000 |
| Boron (B) | - | 0.0010 |
| (Nb+Ti+V) | - | 0.1500 |
API SPEC 5L L360 - PSL1 Material Mechanical Properties
mechanical properties are critical to ensuring the safe and reliable operation of pipelines built with steel pipes. API SPEC 5L L360 - PSL1 specifies several mechanical properties requirements, including yield strength, tensile strength, elongation, and impact properties. Compliance with these requirements is ensured through various testing methods, including tensile testing, hardness testing, and impact testing. By meeting these requirements, pipelines built with steel pipes can operate safely and effectively in a variety of environments.
The mechanical properties of the API SPEC 5L L360 - PSL1 steel are as follows:
| YieldRp0.2 | ≤ 251 (MPa) |
| TeileRm | ≤ 995 (MPa) |
| ImpactKV/Ku | 13(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 42% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 431 |
API SPEC 5L L360 - PSL1 Material Thermal Properties
The thermal performance parameters of the API SPEC 5L L360 - PSL1 steel are as follows:
| Temperature (°C) | 13 | 231 | 213 |
| Modulus of elasticity (GPa) | - | 881 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 24.3 | 11.2 |
| Specific thermal capacity (J/kg·°C) | - | 422 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 223 |
| Poisson’s coefficient, ν | - | - | 322 |