2.4375 / Alloy K500
VALBRUNA GRADE
EG2
STEEL TYPE
Corrosion Resistant Alloys
Profile shapes
- Round EN 10060 / EN 10278
- Flat EN 10058 / EN 10278
- Square EN 10059 / EN 10278
- Hexagonal EN 10278
- Angle EN 10056
- Bar steel, bright steel, wire, wire rod, billets, ingots, semi-finished products
Description of material
EG2 is a Nickel – Copper alloy with very high corrosion resistance and whose strength is increased by the precipitation of particles of Ni3 (Ti, Al) obtained by an exact aging heat treatment. EG2 is an age-hardened alloy with greater strength and resistance corrosion especially in sea water and offers suitable tensile strength up to around 600°even if a rapid reduction of Rm and Rp0,2 starts at around 250-350°C.
Applications
Many marine applications exposed to sea water environments such as pump shafts, marine fixtures, marine fasteners & bolting, tanks, springs, off shore devices, chains and valves for oil and gas processes. In addition, this alloy warrants good cryogenic properties and is non- magnetic even at very low temperatures. It is mostly used in off shore structures, in desalination and chemical plants and in sour gas environments. Marinox EG2 boat shafts offer a high performance in terms of corrosion resistance and high strength. (See Marinox EG2).
Designations
| Commercial name | Alloy K-500 |
| International Designation | NiCu30Al |
| W.N. | (2.4375) |
| UNS | N05500 |
| BS | NA18 |
Chemical composition
| Chemical element | C | Mn | Si | S | Ni | Cu | Fe | Al | Ti | Co |
| Minimum value % | - | - | - | - | 63% | 27% | - | 2,3% | 0,35% | - |
| Maximum value % | 0,25% | 1,5% | 0,5% | 0,01% | - | 33% | 2% | 3,15% | 0,85% | 2% |
Mechanical properties
| Condition | Subtype | Rm [N/mm²] | Rm [Ksi] | Rp0,2% [N/mm²] | Rp0,2 % [Ksi] | E4D [%] | HBW |
| Cold Worked - Aged | CW-PH | 970 min | 141 min | 690 min | 100 min | 14 min | - |
| Cold Worked - Solution Annealed and Aged | CW A + PH | 900 min | 131 min | 585 min | 85 min | 20 min | - |
| Hot Worked - Solution Annealed | HW - A | - | - | - | - | - | 185 max |
| Hot Worked - Aged | HW - PH | 830 min | 120 min | 550 min | 80 min | 15 min | - |
| Hot Worked - Solution Annealed and Aged | HW A+PH | 830 min | 120 min | 500 min | 73 min | 15 min | - |