718
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We propose this metal :
Trading : round bars in all diameters (stored bars are annealed or aged).
Forging : Rings, blocks, rolls etc … (rough or pre-machined pieces, annealed or aged).
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| Carlier designation | NC19FeNb |
| UNS designation | N07718 |
| European numbering designation | 2.4668 |
| AFNOR designation | NiCr19NbMo |
| British Standard designation | HR8 |
| Thyssen Krupp VDM designation | Nicrofer 5219Nb |
| Aubert & Duval designation | Pyrad 53N + P53P |
| NACE designation | MR0175 |
| Applicable standards | | AMS 5662 | | | ASTM B637 | Bars + Forged pieces |
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Chemical composition
| en % | Ni | Cr | Fe | Mo | Nb+Ta | Al | Mn | C | Ti | P | Co | S | | min | 50,000 | 17,000 | - | 2,800 | 4,750 | 0,200 | - | - | 0,650 | - | - | - | | max | 55,000 | 21,000 | Solde | 3,300 | 5,500 | 0,800 | 0,350 | 0,080 | 1,150 | 0,015 | 1,000 | 0,015 | | en % | B | Cu | Si | | min | - | - | - | | max | 0,006 | 0,300 | 0,350 |
Density : 8.19
Guarantee mechanical results in MPa
| Standard | Rm | Rp
0.2% | A % | Z | HB | Hrc | Comments | | ASTM B637 - 98 | 1275 | 1034 | 12 | 15 | 331 | - | Solution heat treated and aged, all sizes. |
Forging conditions
Forging is made at a range of temperature included between 1150 and 950°C, then cooled at appropriate conditions for the final thermal treatment and obtain required characteristics. In any case, please contact us.
Properties / Main use conditions
This Ni-Cr alloy is hardenable by precipitation of elements such as Al, Ti and B. The presence of Mo, Co and Nb increases the stability of the alloy and gives a high resistance to thermal fatigue, and good characteristics to creeping until a temperature of about 700°C. This alloy is the object of various heat treatments.
Main applications
Offshore components and liquefied natural gas extraction at cryotemperature until 700°C. Gas turbines, aeronautic and spatial components, nuclear reactors.
Heat treatment
Please, contact us
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