Mechanical Property Parameters:The defining mechanical parameters for API 5L GR A plates are its strength values, which are standardized to ensure reliability:
Yield Strength: Minimum 30,000 psi (207 MPa).
Tensile Strength: Minimum 48,000 psi (331 MPa).
These parameters provide adequate strength for low to moderate-pressure containment, forming the basis for design calculations in applications like water pipelines or low-pressure gas distribution.
Chemical Composition Parameters:The chemical composition is optimized for weldability and formability:
Carbon (C): Typically a maximum of 0.22%, ensuring good weldability.
Manganese (Mn): Typically specified up to 0.90%, contributing to strength.
Phosphorus (P) & Sulfur (S): Low maximum limits (e.g., P≤0.030%, S≤0.030%) to maintain sound internal quality and toughness.
Dimensional & Testing Parameters:While plate dimensions (thickness, width, length) are supplied as per purchase order, the standard mandates specific testing:
Testing: All plates undergo tensile testing and bend testing to verify mechanical properties and soundness.
Hydrostatic Testing: Pipes manufactured from these plates are subject to hydrostatic testing, ensuring leak-tight integrity.
