Uns C72900 C729 [cracked] 〈PLUS · SERIES〉

The defining characteristic of C72900 is its metallurgical structure, achieved through . This process involves a controlled heat treatment that creates sub-microscopic fluctuations in the chemical composition, drastically increasing the material's yield strength—often up to three times that of the base metal.

| Property | Typical Value (annealed) | Typical Value (H900) | |----------|--------------------------|----------------------| | Tensile strength | 620 MPa (90 ksi) | 1 380 MPa (200 ksi) | | Yield strength (0.2 % offset) | 415 MPa (60 ksi) | 1 240 MPa (180 ksi) | | Elongation (A) | 30 % | 10 % | | Hardness (HRB) | 70 HRB | 44‑48 HRC | | Modulus of elasticity | ~200 GPa (29 Msi) | – | | Density | 7.75 g/cm³ (0.28 lb/in³) | – | | Corrosion resistance | Comparable to 304/316 in many environments, superior in chlorides when properly aged | Similar, but higher strength may reduce ductility in aggressive media | uns c72900 c729

Excellent in: