Inconel 625LCF(UNS N06626 W.Nr. 2.4856)

1.Inconel 625LCF INTRODUCTION

A nickel-chromium-molybdenum alloy that was  developed as a fatigue-resistant bellows-quality  version of INCONEL alloy 625. Alloying, melting  and processing of this alloy are specially designed  and controlled to provide a sheet product with  optimum resistance to low-cycle and thermal  fatigue at temperatures up to 1200°F (650°C).  Used in Aircraft exhaust and automotive flexible  coupling bellows and expansion joints in various  types of process or transport piping

2.Inconel 625LCF STANDARD  PRODUCT FORMS

Sheet and strip.

3.Inconel 625LCF MAJOR  SPECIFICATIONS

UNS N06625, N06626 ASTM B 443 ASME SB-443 SAE AMS 5879

4.Inconel 625LCF LIMITING CHEMICAL  COMPOSITION, %

Ni..........58.0 min. 

Cr .....20.0 – 23.0 

Mo...... 8.0 – 10.0 

Nba...3.15 – 4.15 

Plus Co. 

Fe.......... 5.0 max. 

C..........0.03 max. 

Si.........0.15 max. 

N..........0.02 max. 

Mn.......0.50 max. 

S....... 0.015 max. 

Al .........0.40 max. 

Ti .........0.40 max. 

P....... 0.015 max. 

Co.......... 1.0 max.

5.Inconel 625LCF PHYSICAL CONSTANTS  AND THERMAL  PROPERTIES

Density, Ib/in3 ........................................................................0.305 

g/cm3 ......................................................................... 8.44 

Melting Range, °F ...................................................2350 – 2460 

°C ...................................................1290 – 1350  

Specific Heat, Btu/lb•°F.....................................................0.098 

J/kg•°C........................................................... 410 

Curie Temperature, °F........................................................<-320 

°C .......................................................<-196

Permeability at 200 Oersted (15.9 kA/m)................. 1.0006 

Coefficient of Expansion, 70 – 200°F, 10-6 in/in •°F........ 7.1 

20 – 100°C, μm/m •°C ......... 12.8 

Thermal Conductivity, Btu • in/ft2•h•°F..............................68

W/m •°C.............................................9.7 

Electrical Resistivity, ohm • circ mil/ft............................... 776 

μΩ•m................................................ 1.29

6.Inconel 625LCF TYPICAL MECHANICAL  PROPERTIES

(Annealed) 

Tensile Strength, ksi............................................................... 130 

MPa............................................................ 894 

Yield Strength (0.2% Offset), ksi...........................................68 

MPa..................................... 469 Elongation, % ..............................................................................50