Monel K-500^* Specification
*Trade name of Special Metals Group of Companies

This Nickel-Copper alloy is precipitation hardenable, due to the additions of Aluminium and Titanium. It combines the corrosion resistance of Monel 400 but gives the added advantage of extra strength and hardness (as a result of its age hardening ability).

Good Mechanical Properties at Elevated Temperatures	No
Corrosion Resistant at Ambient Temperatures	Yes
Corrosion Resistant & Good Mechanical Properties at Elevated Temperatures	No
Oxidation Resistant	No
Precipitation Hardenable	Yes

Approximate Chemical Composition
Ni	63% min
Cu	30%
Fe	2% max
Al	2.3 - 3.15%
Ti	0.35 - 0.85%

Properties
DENSITY	8.44 g/cm3	0.305 lb/in3
MELTING POINT	1350oC	2460oF
COEFFICIENT OF EXPANSION	13.7 µm/m °C (20 - 100°C)	7.6 x 10-6 in/in °F (70 - 212°F)
MODULUS OF RIGIDITY	66 kN/mm2	9573 ksi
MODULUS OF ELASTICITY	179 kN/mm2	25962 ksi

CONDITION OF SUPPLY	HEAT TREATMENT (AFTER FORMING)
Annealed	Age harden at 580 - 590oC (1075 - 1095oF) for 8 - 10 hours and air cool. *
Spring Temper	Age harden at 530 - 550oC (985 - 1020oF) for 4 - 6 hours and furnace cool to 450oC (840oF) at a rate of 8 -15oC (45 - 60oF) per hour and air cool.*
Spring Temper	Age harden at 530 - 540oC (985 -1005oF) for 4 - 6 hours and air cool. *

* heat treating Monel K-500 in free air can have a detrimental effect on its corrosion resistant properties.

CONDITION	APPROX TENSILE STRENGTH		APPROX SERVICE TEMPERATURE
Annealed	650 - 850 N/mm2	94 - 123 ksi	-100 to +260oC	-150 to +500oF
Annealed + Aged	950 - 1050 N/mm2	138 - 167 ksi	-100 to +260oC	-150 to +500oF
Spring Temper	1000 - 1300 N/mm2	145 - 189 ksi	-100 to +260oC	-150 to +500oF
Spring Temper + Aged	1200 - 1500 N/mm2	174 - 218 ksi	-100 to +260oC	-150 to +500oF