X750
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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 | NC15TNbA |
| UNS designation | N07750 |
| European numbering designation | 2.4669 |
| AFNOR designation | NiCr15Fe7TiAl |
| British Standard designation | HR505 |
| Thyssen Krupp VDM designation | Nicrofer 7016TiNb |
| Aubert & Duval designation | PER 20N |
| Applicable standards | | ASTM B637 | Bars + Forged pieces |
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Chemical composition
| en % | Ni | Cr | Fe | Cu | Nb+Ta | Al | Mn | C | Ti | Si | Co | S | | min | 70,000 | 14,000 | 5,000 | - | 0,700 | 0,400 | - | - | 2,250 | - | - | - | | max | - | 17,000 | 9,000 | 0,500 | 1,200 | 1,000 | 1,000 | 0,080 | 2,750 | 0,500 | 1,000 | 0,010 |
Density : 8.25
Guarantee mechanical results in MPa
| Standard | Rm | Rp
0.2% | A % | Z | HB | Hrc | Comments | | ASTM B637 - 98 | 965 | 620 | 8 | - | 262 | - | 1 type treatment, solution, stabilized and aged. | | ASTM B637 - 98 | 1170 | 790 | 18 | 18 | 302-363 | - | 2 type treatment, solution and aged, up to 63.5 mm | | ASTM B637 - 98 | 1103 | 689 | 20 | 20 | 267-363 | - | 3 type treatment, solution and aged, from 63.5 to 101.6 mm. |
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
Nickel-Chromium-Iron alloy, a variant of 600, but including titanium (2,5%) and aluminium (0,5%) to make it hardenable by precipitation, Rm reaching about 1150 MPa (instead of about 655). Good resistance to oxidation until 820°C and excellent mechanical results until about 700°C.
Main applications
Gas turbine components. Nuclear reactors. Aeronautics. Springs and fastenings submitted to high temperatures.
Heat treatment
Please, contact us
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