Monel® K-500

Available in any of the 'profile options'

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).

Monel® K-500 is also known as Nicorros Al.

Chemical Composition

Specifications

Designations

Key Features

Typical Applications

Element	Min %	Max %
Ni	63.00	70.00
Co	–	2.00
Cu	27.00	33.00
Fe	–	2.00
Al	2.30	3.20
C	–	0.25
Si	–	1.00
Mn	–	1.50
Ti	0.35	0.85
S	–	0.01

ASTM B865
BS 3075 NA 18
BS 3076 NA 18
ISO 15156-3
(NACE MR 0175)
QQ-N-286

W.Nr 2.4375
UNS N05500
AWS 041

Corrosion resistance similar to Monel 400 but with higher strength and hardness
Low permeability and is non-magnetic to temperatures as low as -101°C (-150°F )
Age hardenable
Good for sea water applications

Pump Shafts
Fasteners
Marine Propeller Shafts
Oil Well Tools
Instruments
Springs

Density	8.44 g/cm³	0.305 lb/in³
Melting Point	1350°C	2460°F
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

Heat Treatment of Finished Parts
Condition as supplied by Alloy Wire	Type	Temperature		Time (Hr)	Cooling
Condition as supplied by Alloy Wire	Type	°C	°F	Time (Hr)	Cooling
Annealed	Age Harden ^Δ	580 – 590	1075 – 1095	8 – 10	Air
Spring Temper	Age Harden ^Δ	530 – 540	985 – 1005	4 – 6	Air

^Δ Heat treating Monel K-500 in free air can have a detrimental effect on its corrosion resistant properties.

Properties
Condition	Approx. tensile strength		Approx. operating temperature
Condition	N/mm²	ksi	°C	°F
Annealed	650 – 850	94 – 123	-100 to +260	-150 to +500
Annealed + Aged	950 – 1050	138 – 167	-100 to +260	-150 to +500
Spring Temper	1000 – 1300	145 – 189	-100 to +260	-150 to +500
Spring Temper + Aged	1200 – 1500	174 – 218	-100 to +260	-150 to +500