1. Standard
American Standard:API 5LD
2. Chemical Composition
X52 Chemical Composition,%
C | Si | Mn | P | S | V | |
min | 0.2 | 1.0 | 0.05 | |||
max | 0.15 | 0.6 | 1.65 | 0.035 | 0.035 | 0.12 |
Actual value | 0.12 | 0.46 | 1.62 | 0.019 | 0.007 | 0.07 |
N08825 Chemical Composition,%
C | Si | Mn | P | S | Cr | Ni | Mo | Cu | Ti | Al | Fe | |
Min | 19.5 | 38.0 | 2.5 | 1.5 | 0.6 | 22 | ||||||
Max | 0.05 | 0.5 | 1.0 | 0.020 | 0.020 | 23.5 | 46.0 | 3.5 | 3.0 | 1.2 | 0.2 | |
Actual value | 0.02 | 0.38 | 0.35 | 0.015 | 0.006 | 19.9 | 42.2 | 2.82 | 1.76 | 0.84 | 0.03 | 31.67 |
3. Mechanical properties
X52
Mechanical Properties |
Tensile Strength MPa |
Yield Strength MPa |
Hardness HBW |
IMPact AKv (longitudinal) (-20℃) J |
Elongation (longitudinal) % |
Grain Size |
Min(Requirements) | 460 | 360 | 70 | 23 | 8 | |
Max(Requirements) | 760 | 530 | 220 | |||
Actual value | 608 | 454 | 187 | 176 | 36 | 9.5 |
4. Typical Size
Size | Size and Tolerance(mm) | |
Φ114.3*(16+3) | Pipe Body Outer Diameter | The outer diameter shall be determined according to the inner diameter, the thickness of the wall and the deviation of the pipeline. |
Pipe Body Inner Diameter | ±0.75d(d—Inner Diameter) | |
Base Material Thickness | -10% ~ 15% | |
CRA Layer Thickness | 0 ~ 2mm |
5.Typical Application Environment
It is mainly used for process pipeline in acid gas field and chemical pipeline