Tri-Ply Circles
Elongation, Tensile & Yield: Mechanical Specs for Deep Drawing
Your press shop cares about three numbers more than any other. Here is what they mean for deep drawing tri-ply.
Elongation (%)
How far the metal stretches before breaking. 40%+ is the comfort zone for deep-drawn cookware. Below ~35%, expect cracking on deep vessels like kadhai.
Tensile strength (MPa)
Maximum stress before failure. Typical tri-ply: 345-370 MPa. Too high = hard to draw; too low = weak vessel.
Yield strength (MPa)
Where permanent deformation starts. Typical: 246-277 MPa. The gap between yield and tensile is your forming window.
Using the numbers
Share MTCs with your tooling engineer before cutting dies. A new circle lot with different properties may need press parameter tweaks - 10 minutes of adjustment beats a day of cracked vessels.
Frequently asked questions
What elongation is needed for deep drawing?
40%+ for comfortable deep drawing of cookware vessels; below ~35% risks cracking.
Have a cookware project in mind?
We manufacture triply cookware and supply tri-ply circles for OEM, private label and distribution. Tell us your specs - we reply with a quote.