ISO 3183 PSL2 Grade X70ME Introduce
ISO 3183 PSL2 Grade X70ME is an international standard that defines and categorizes the way steel pipes are used in the oil and gas industry. It covers both process and structural pipes and offers detailed information on pipe design and production, as well as quality assurance processes. The goal of the standard is to ensure that steel piping used in the oil and gas industry is safe, reliable, and compatible with the other components in the system.
Smelting temperature:1844°C - 1975°C
Application:Petroleum and natural gas industries -- Steel pipe for pipeline transportation systems
ISO 3183 PSL2 Grade X70ME Material Chemical Composition
The chemical composition of the ISO 3183 PSL2 Grade X70ME steel are as follows:
| Element | Min | Max |
|---|---|---|
| (CE Pcm) | - | 0.2500 |
| Carbon (C) | - | 0.1200 |
| Manganese (Mn) | - | 1.7000 |
| PhOsphorus (P) | - | 0.0250 |
| Sulfur (S) | - | 0.0150 |
| Silicon (Si) | - | 0.4500 |
| Nickel (Ni) | - | 0.3000 |
| Chromium (Cr) | - | 0.3000 |
| Molybdenum (Mo) | - | 0.1000 |
| Copper (Cu) | - | 0.2500 |
| Vanadium (V) | - | 0.1100 |
| Titanium (Ti) | - | 0.0700 |
| Nitrogen (N) | - | 0.0120 |
| Aluminum (Al) | 0.0150 | 0.0600 |
| Niobium (Nb) | - | 0.0700 |
| (V+Nb+Ti) | - | 0.1500 |
| (CEV) | - | 0.4300 |
ISO 3183 PSL2 Grade X70ME Material Mechanical Properties
ISO 3183 PSL2 Grade X70ME has excellent corrosion resistance, making it well-suited for use in many industrial applications. The corrosion resistance of the steel can be improved by low levels of sulfur and phosphorous, as well as by adding chromium and nickel to the alloying elements. The steel's ability to resist corrosion is also dependent on the surrounding environment. In a marine environment, for example, the alloy should be treated with additional corrosion inhibitors to improve its resistance to corrosion.
The mechanical properties of the ISO 3183 PSL2 Grade X70ME steel are as follows:
| YieldRp0.2 | ≤ 843 (MPa) |
| TeileRm | ≤ 458 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 23% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 111 |
ISO 3183 PSL2 Grade X70ME Material Thermal Properties
The thermal performance parameters of the ISO 3183 PSL2 Grade X70ME steel are as follows:
| Temperature (°C) | 21 | 993 | 228 |
| Modulus of elasticity (GPa) | - | 934 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 34.2 |
| Specific thermal capacity (J/kg·°C) | - | 122 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.33 | - | - |
| Deity (kg/dm³) | - | - | 244 |
| Poisson’s coefficient, ν | - | - | 233 |
ISO 3183 PSL2 Grade X70ME Material Machining Technology
The machining of ISO 3183 PSL2 Grade X70ME is a difficult and precise process which requires specialized tools and techniques. The material is highly resistant to heat and abrasion, making it challenging to cut and shape. In order to obtain reliable and accurate results, the right approach and experience must be employed.