Alloy K500 is a nickel-copper alloy which combines the excellent corrosion resistance of Alloy 400 with higher strength and hardness obtained through the addition of aluminium and titanium to the nickel- copper base. It has excellent low temperature properties with tensile and yield strengths increasing with decrease in temperature, while ductility and toughness are virtually unimpaired. There is no ductileto-brittle transformation even at temperatures as low as liquid hydrogen, making it suitable for cryogenic applications. The corrosion resistance of Alloy K500 is equivalent to that of Alloy 400 except that in the aged condition, it has a greater tendency towards stress-corrosion cracking in some environments. It is resistant to a sour gas environment and has very low corrosion rates in high velocity seawater, making it ideal for marine applications.
Industry Standards Include:
ASTM B865
BS 3076 NA18 1989
UNS N05500
NACE MR0175/ISO15156 (Hot worked only)
Werkstoff Nr. 2.4375