Monel R-405(UNS UNS N04405)

1.Monel R-405 INTRODUCTION

The free-machining version of MONEL alloy 400.  A controlled amount of sulfur is added to the  alloy to provide sulfide inclusions that act as chip  breakers during machining. Other characteristics  are essentially the same as those of MONEL alloy  400. Used for meter and valve parts, fasteners and screw-machine products.

2.Monel R-405 STANDARD  PRODUCT FORMS

Round bar, hexagon and wire.

3.Monel R-405 MAJOR  SPECIFICATIONS

UNS N04405 

NACE MR-01-75 

ASTM B 164 

ASME SB-164 

SAE AMS 4674, 7234 

QQ-N 281 

MIL-N-894

4.Monel R-405 LIMITING CHEMICAL COMPOSITION, %

Ni .........63.0 min.

Cu.....28.0 – 34.0 

Fe.......... 2.5 max. 

Plus Co. 

S...0.025 – 0.060 

Mn......... 2.0 max. 

C............ 0.3 max. 

Si........... 0.5 max.

5.Monel R-405 PHYSICAL CONSTANTS  AND THERMAL  PROPERTIES

Density, Ib/in3 .........................................................................0.318 

g/cm3 ......................................................................... 8.80 

Melting Point, °F.....................................................2370 – 2460 

℃.....................................................1300 – 1350 

Specific Heat, Btu/lb •°F....................................................0.102

J/kg •°C.......................................................... 427 

Curie Temperature, °F...................................................70 – 120 

°C ....................................................20 – 50 

Coefficient of Expansion, 70 – 200°F, 10-6 in/in •°F........ 7.6 

20 – 95°C, μm/m •°C............ 13.7 

Thermal Conductivity, Btu • in/ft2• h•°F........................... 151 

W/m•°C.......................................... 21.8 

Electrical Resistivity, ohm • circ mil/ft............................. 307

μΩ•m..............................................0.510

6.Monel R-405 TYPICAL MECHANICAL  PROPERTIES

(Annealed) 

Tensile Strength, ksi..................................................................80 

MPa............................................................ 550 

Yield Strength (0.2% Offset), ksi...........................................35 

MPa..................................... 240 

Elongation, % ..............................................................................40