Characteristics of ASTM A516 Grade 70 (A516GR70):
chemical composition:
Carbon (C): 0.27-0.31%
Manganese (Mn): 0.79-1.3%
Phosphorus (P): 0.035% maximum
Sulfur (S): 0.035% maximum
Silicon (Si): 0.13-0.45%
Mechanical behavior:
Tensile strength: 485-620 MPa (70-90 ksi)
Yield Strength: Minimum 260 MPa (38 ksi)
Elongation: 17% minimum for 8 inches, 21% minimum for 2 inches
Density: 7.85 g/cm3 (0.284 lb/cubic inch)
Modulus of elasticity: 200 GPa (29,000 ksi)
Thermal conductivity: 52.6 W/m·K at 100°C
Specific heat capacity: 470 J/kg·K
Resistivity: 0.0000159Ω·m
Hardness: Typically approximately 187 Brinell (HB) or equivalent Rockwell hardness.
Weldability: Good weldability with proper preheating and post-weld heat treatment practices.
Corrosion resistance: Resistant to corrosion under various atmospheric conditions; susceptible to local corrosion in certain environments.
Impact resistance: Good impact resistance at room temperature and lower temperatures.
Applications: Typically used in pressure vessel and boiler applications where moderate to low temperature service conditions are encountered.
Heat Treatment: Normalizing or stress relieving after welding is often used to enhance material properties and remove residual stresses.
