Complete specifications for Inconel 725, an age-hardenable nickel-chromium-molybdenum superalloy with exceptional corrosion resistance and twice the strength of Alloy 625.
Alloy 725 is highly resistant to corrosion and is age hardenable for extremely high strength. It is used in a broad range of severe corrosive environments. The strength of age-hardened A725 is twice that of A625 annealed.
Due to outstanding corrosion resistance and high strength, applications for this alloy are used for hangers, side pocket mandrels, springs and polished bore receptacles for sour gas service. A hardness level of 43 HRC max is allowed in NACE MR0175, 44 HRC max when elemental sulfur is not present.
| Element | Min % | Max % |
|---|---|---|
| C | - | 0.03 |
| Si | - | 0.20 |
| Mn | - | 0.20 |
| P | - | 0.015 |
| S | - | 0.010 |
| Cr | 19.00 | 22.50 |
| Ni | 50.00 | 59.00 |
| Mo | 7.00 | 9.50 |
| Nb/Cb | 2.75 | 4.00 |
| Ti | 1.00 | 1.70 |
| Al | - | 0.35 |
| Fe | Balance | Balance |
Outstanding corrosion resistance with twice the strength of annealed Alloy 625
Exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in seawater
Lower corrosion resistance but more widely available than 725
Excellent corrosion resistance but half the strength of age-hardened 725
Similar corrosion resistance with different strength characteristics
Superior chemical resistance but lower strength than 725
Complete chemical composition, mechanical properties, and heat treatment specifications
Specific requirements for Alloy 725 in API 6A wellhead and completion applications
Hardness restrictions and service requirements for sour gas applications
Get competitive pricing on high-quality Inconel 725 with complete material certifications, age hardening services, and API 6A compliance documentation.