What is the material of ASTM A672 D80 pipe
Material Description of A672 D80
A672 D80 is classified as an electrofusion welded (EFW) steel pipe material grade in the ASTM A672/A672M standard with the following characteristics:
1. Material Classification
Base material: Carbon steel or low alloy steel, the specific composition is adjusted according to the standard grade.
Corresponding grade: D80 indicates the tensile strength grade of the material (approx. 80 ksi, i.e. 550 MPa) and the heat-treated condition.
2. Chemical composition
The similar grade B60 (corresponding to SA516 Gr.60) is used as a reference:
Carbon (C): ≤ 0.30 %
Manganese (Mn): ≤1.60 per cent
Silicon (Si): 0.15%~0.40%
Phosphorus (P), sulfur (S): ≤ 0.035%
3. Mechanical properties
Tensile strength: ≥550 MPa (D80 corresponds to 80 ksi).
Yield strength: ≥415 MPa (refer to B70 CL22 grade).
Elongation: ≥18% (thickness related).
4. Application Scenarios
Used in medium and high temperature (-30°C~+430°C) high pressure piping systems, such as oil and gas transmission and chemical equipment.
Typical process: Electrofusion welding, with radiographic or ultrasonic testing to ensure the quality of the weld.
Summary
A672 D80 is a high-strength carbon steel/low-alloy steel electrofusion welded pipe under the ASTM A672 standard for high-pressure, high-temperature industrial piping systems, with performance parameters similar to those of similar grades such as B70 and C60, but with higher strength.
