Inconel 625(UNS N06625 W.Nr.2.4856)

1.Inconel 625 INTRODUCTION

A nickel-chromium-molybdenum alloy with  an addition of niobium that acts with the  molybdenum to stiffen the alloy's matrix  and thereby provide high strength without a  strengthening heat treatment. The alloy resists  a wide range of severely corrosive environments  and is especially resistant to pitting and  crevice corrosion. Used in chemical processing,  aerospace and marine engineering, pollutioncontrol equipment and nuclear reactors.

2.Inconel 625 STANDARD  PRODUCT FORMS

Pipe, tube, sheet, strip, plate, round bar, flat bar, forging  stock, hexagon, wire and extruded section.

3.Inconel 625 MAJOR  SPECIFICATIONS 

UNS N06625 

ASTM B 366, B 443, B 444,  B 446, B 564, B 704,   B 705, B 751, B 775, B 829 

ASME SB-366, SB-443, SB-444,   SB-446, SB-564, SB-704,   SB-705, SB-751, SB-775,   SB-829 

ASME Code Case 1935 

SAE AMS 5581, 5599, 5666,  5837, 5869, MAM 5599 

BS 3072, 3074, 3076 (NA21) 

DIN 17744, 17750 – 17754 

Werkstoff Nr. 2.4856 

NACE MR-0175/ISO 15156 

VdTüV 499, 

EN 10095

ISO NW6625, 

ISO 6207, 6208, 9723 – 9725, 4955A

4.Inconel 625 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..........0.10 max. 

Mn.......0.50 max. 

Si.........0.50 max.  

S....... 0.015 max. 

Al .........0.40 max. 

Ti .........0.40 max.

P........ 0.015 max. 

Cob ......... 1.0 max. 

If determined.

5.Inconel 625 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 

21 – 93°C, μm/m •°C............ 12.8 

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

W/m •°C.............................................9.8 

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

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

6.Inconel 625 TYPICAL MECHANICAL  PROPERTIES