What are the properties of a516gr70?

Properties 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 Properties:

• Tensile Strength: 485-620 MPa (70-90 ksi)
• Yield Strength: 260 MPa minimum (38 ksi)
• Elongation: 17% minimum in 8 inches, 21% minimum in 2 inches

Density: 7.85 g/cm³ (0.284 lb/in³)

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

Electrical Resistivity: 0.0000159 Ω·m

Hardness: Typically around 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; vulnerable to localized corrosion in certain environments.

Impact Resistance: Good impact resistance at room temperature and lower temperatures.

Applications: Commonly used in pressure vessel and boiler applications where moderate to lower temperature service conditions are encountered.

Heat Treatment: Normalizing or stress relieving after welding is typical to enhance the material properties and relieve residual stresses.

These properties collectively make ASTM A516 Grade 70 a popular choice for various industrial applications requiring high strength, good weldability, and excellent notch toughness.