How do the mechanical properties of 316L, 316H, and 316Ti pipes differ in terms of strength and ductility?

The mechanical properties of 316L, 316H, and 316Ti stainless steel pipes differ as follows:

Tensile Strength:

• 316H has the highest tensile strength, typically around 485-655 MPa (70-95 ksi).
• 316Ti has intermediate tensile strength, around 515-655 MPa (75-95 ksi).
• 316L has the lowest tensile strength, around 485-585 MPa (70-85 ksi).

Yield Strength:

• 316H has the highest yield strength, typically 205-450 MPa (30-65 ksi).
• 316Ti has intermediate yield strength, around 205-415 MPa (30-60 ksi).
• 316L has the lowest yield strength, around 170-380 MPa (25-55 ksi).

Ductility (Elongation):

• 316L has the highest ductility, with elongation around 40-60%.
• 316Ti has intermediate ductility, with elongation around 35-50%.
• 316H has the lowest ductility, with elongation around 30-45%.

The higher carbon content in 316H increases its strength compared to 316L, but reduces ductility. The addition of titanium in 316Ti also increases strength compared to 316L, but not as much as the higher carbon in 316H. However, the titanium addition in 316Ti helps maintain better ductility compared to 316H.

In summary, 316H prioritizes maximum strength, 316L prioritizes maximum ductility, and 316Ti strikes a balance between strength and ductility compared to the other two grades.