Alloy K500 / UNS N05500
MATERIAL DESCRIPTION
Alloy K500 is a precipitation age hardenable nickel-copper alloy. The alloy is non magnetic to temperatures less than -101°C. The combination of low magnetic permeability, high strength and good corrosion resistance has been used to advantage in a number of applications, notably oil-well surveying equipment and electronic components.
The low temperature properties of K500 are outstanding. Tensile and yield strengths increase with decrease in temperature while ductility and toughness are virtually unimpaired. No ductile-to-brittle transformation occurs even at temperatures as low as -200°C, thus the alloy is suitable for many cryogenic applications.
Applications
Typical area of usage is pump shafts and oil well tools.
Heat Treatment
Solution annealing: 980 – 1040°C. Age hardened: 540 – 600°C.
Weldability
Very good.
Chemical composition
| Weight % | C | SI | MN | NI+CO | CU | AL | TI | S | P | FE |
| MIN. | 63,00 | 27,00 | 2,30 | 0,35 | ||||||
| MAX. | 0,25 | 0,50 | 1,50 | 33,00 | 3,15 | 0,85 | 0,01 | 0,03 | 2,00 |
Product Standards: ASTM B865, DIN 17754, AMS 4676
Approvals: NACE MR0175
Mechanical Properties: BAR
| Yield strength RP0.2, MPA |
Tensile strength RM, MPA |
Elongation [%] |
Hardness [HB] |
Impact, Charpy-V, -40ºC [J] |
| ≥ 620 | ≥ 900 | ≥ 17 | ≤ 250 |
ROUND BAR STOCK
| DIA | KG/M |
| 38,1 mm | 9.9 |
| 44,45 mm | 13.5 |
| 50,8 mm | 17.6 |
| 63,5 mm | 27.5 |
| 76,2 mm | 39.5 |
| 82,55 mm | 46.4 |
Equivalent Standards
- EN 2.4375
- UNS N05500
- Alloy K500