625
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We propose this metal :
Trading : bound bars in any diameter (the stored bars are grade 1).
Forged pieces : rings, blocks, rolls, etc… (rough or machined pieces, grade 1 or grade 2).
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| Carlier designation | NC22DNb |
| UNS designation | N06625 |
| European numbering designation | 2.4856 |
| AFNOR designation | NiCr22Mo9Nb |
| Thyssen Krupp VDM designation | Nicrofer 6020hMo |
| Aubert & Duval designation | PER 625 |
| NACE designation | MR0175 |
| Applicable standards | | AMS 5666 | | | ASTM B443 | Plates | | ASTM B446 | Bars | | ASTM B564 | Forged pieces |
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Chemical composition
| en % | Ni | Cr | Fe | Mo | Nb+Ta | Al | Mn | C | Ti | P | Co | S | | min | 58,000 | 20,000 | - | 8,000 | 3,150 | - | - | - | - | - | - | - | | max | - | 23,000 | 5,000 | 10,000 | 4,150 | 0,400 | 0,500 | 0,100 | 0,400 | 0,015 | 1,000 | 0,015 |
Density : 8.44
Guarantee mechanical results in MPa
| Standard | Rm | Rp
0.2% | A % | Z | HB | Hrc | Comments | | ASTM B446 - 00 | 827 | 414 | 30 | - | - | - | Grade 1, up to diameter 101.6 mm incl. | | ASTM B446 - 00 | 758 | 345 | 25 | - | - | - | Grade 1, diameter 101.6 to 254 mm incl. | | ASTM B446 - 00 | 690 | 276 | 30 | - | - | - | Grade 2, all diameters | | ASTM B564 - 00a | 827 | 414 | 30 | - | - | - | Annealed, up to 102 mm incl. | | ASTM B564 - 00a | 758 | 345 | 25 | - | - | - | Annealed, from 102 to 254 mm incl. |
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
Ni-Cr-Mo-Nb alloy with a low carbon percentage, created in the 1960, it offers a high resistance to corrosion in a wide range of atmospheres, with a high metallurgical stability due to a percentage of Nb. This alloy is used soften annealed to resist the wet corrosion, moreover appropriated treatments can make it utilisable until very high temperatures (1000°C) due to its higher percentage of C. Excellent resistance to sea water until high temperatures.
Main applications
Equipments for chemical and petrochemical industry. Making super-phosphoric acids. Heat elongation equalizer resisting to the corrosion fatigue. Refinery flares. Pipes and valves for sea water. Components for boilers and equipments for waste incineration. Aeronautics and spacial components.
Heat treatment
Please, contact us
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