Nickel & Cobalt Based Superalloys For The Harshest of Environments
The term “Superalloys” is applied to alloys which have outstanding high temperature strength and oxidation resistance. The nickel-based superalloys contain carefully balanced alloying additions of chromium, cobalt, aluminium, titanium and other elements. Cobalt based superalloys are metals whose major mass fraction is cobalt. The base combination of most cobalt alloys is cobalt-chromium, with chromium acting as a strengthening alloy. Adding tungsten and/or molybdenum can affect strengthening even more.
A superalloy, or high-performance alloy, is generally considered to be an alloy with the ability to operate at a high fraction of its melting point making them excellent for industrial applications with elevated operating temperatures. Several key characteristics of a superalloy are excellent mechanical strength, resistance to thermal creep deformation, good surface stability, and resistance to corrosion or oxidation. Superalloy development has relied heavily on both chemical and process innovations.
Superalloys develop high temperature strength through solid solution strengthening and precipitation strengthening from secondary phase precipitates such as gamma prime and carbides. Oxidation or corrosion resistance is provided by elements such as aluminium and chromium. Superalloys are often cast as a single crystal—while grain boundaries may provide strength at low temperatures, they decrease creep resistance. The primary application for such alloys is in aerospace and marine turbine engines. Creep is typically a lifetime-limiting factor.
Alloy-Search offers a selected range of superalloy grades according to numerous industry specifications:
| Trade Name | DIN | EN-ISO | UNS | BS | ASTM | SAE-AMS | AFNOR | ASME | JIS | OEM / Other | Remark |
| Alloy 80A | 2.4631 2.4952 | NiCr20TiAl | N07080 | NA20: 3076 BS HR1 BS2 HR1 | B-637 | – | NC 20 TA | SB-637 | NCF80A | Nimonic 80A Nicrofer 7520Ti Grade 80A AECMA Pr EN: 2188 2191 2396 2397 MSRR7095 MSRR7011 MSRR7013 | Available in grades: – Solution Annealed – Stabilized – Precipitation Hardened |
| Alloy 625 | 2.4856 | NiCr22Mo9Nb | N06625 | NA21: 3072 3073 3075 3076 | B-443 B-446 | AMS 5599 AMS 5666 AMS 5869 AMS 5879 | NC 22DNb | SB-443 SB-446 | G 4901 G 4902 NCF 625 | NACE MR0103 Inconel 625 Haynes 625 Bohler L625 GOST ХН75МБТЮ OR ЭИ602 | Available in grades: – Annealed (Grade 1) – Solution Annealed (Grade 2) |
| Alloy 901 | 2.4662 | NiFe35Cr14MoTi NiCr13Mo6Ti3 | N09901 | BR HR55 | – | AMS 5660 AMS 5661 | Z8NCDT42 | – | – | Pyromet 901 Nimonic 901 Inconel 901 Udimet 901 Nickelvac 901 Bohler L901 B50A305 MSRR7029 MSRR7031 | Available in grades: – Annealed – Aged |
| Alloy 718 | 2.4668 | NiCr19Fe19Nb5Mo3 NiCr19Nb5Mo3 | N07718 | BS-EN-ISO-15156 BS NA 51 | B637 B670 | AMS 5596 AMS 5597 AMS 5662 AMS 5663 | NC19FeNb | SB-637 | G 4901 G 4902 NCF 718 | Nicrofer 5219 Nb API 6A 718 API 6A CRA NACE MR0175 Inconel 718 Böhler 718 | Available in grades: – Solution Treated – Aged |
| Alloy 25 | 2.4964 2.4967 | CoCr20W15Ni10 | R30605 | BS HR40 BS HR240 BS2 HR40 | F90 F1091 | AMS 5759 AMS 5537 | KC20WN | – | – | CO-PH4101 L-605 Stellite 25 Haynes 25 MA25 Alacrite XSH Conicro 5010W B50A460 B50T26A NACE MR0175 | Available in grades: – Annealed – Hardened |
Is the grade you are looking for not listed? Feel free to send us your inquiry to info@alloy-search.com.
Our extensive network of steel mills and stock-holders enables Alloy-Search to support your business with the required alloys in-time.