Hastelloy G-3(UNS N06985 W.Nr. 2.4619)

1.Hastelloy G-3 Introduction

A nickel-chromium-iron alloy with additions  of molybdenum and copper. It has good  weldability and resistance to intergranular  corrosion in the welded condition. The low  carbon content helps prevent sensitization and  consequent intergranular corrosion of weld  heat-affected zones. Used for flue-gas  scrubbers and for handling phosphoric and  sulfuric acids.

2.Hastelloy G-3 STANDARD  PRODUCT FORMS

Pipe and tube.

3.Hastelloy G-3 MAJOR  SPECIFICATIONS

UNS N06985 ASTM B 366, B 581, B 582,   B 619, B 622, B 626,   B 751, B 775, B 829 

NACE MR-0175/ISO 15156 

ASME SB-366, SB-581, SB-582,  SB-619, SB-622, SB-626,  SB-751, SB-775, SB-829 

DIN 17744, 17750 – 17752 

Werkstoff Nr. 2.4619 ISO 6207, 6208, 9724

4.Hastelloy G-3 LIMITING CHEMICAL  COMPOSITION, %

Ni.......Remainder 

Cr......21.0 – 23.5 

Fe.....18.0 – 21.0 

Mo.........6.0 – 8.0 

Cu..........1.5 – 2.5 

Nb.......0.50 max. 

C....... 0.015 max. 

W........... 1.5 max. 

Si........... 1.0 max. 

Plus Co. 

Mn......... 1.0 max. 

P..........0.04 max. 

S..........0.03 max. 

Co.......... 5.0 max.

4.Hastelloy G-3 PHYSICAL CONSTANTS  AND THERMAL  PROPERTIES

Density, Ib/in3 .........................................................................0.294 

g/cm3 ......................................................................... 8.14 

Melting Point, °F.....................................................2300 – 2450 

°C.....................................................1260 – 1340 

Specific Heat, Btu/lb •°F....................................................0.108 

J/kg •°C.......................................................... 452 

Coefficient of Expansion, 70 – 200°F, 10-6 in/in •°F........8.1 

24 – 100°C, μm/m •°C......... 14.6 

Thermal Conductivity, Btu • in/ft2• h•°F..............................69 

W/m•°C.......................................... 10.0

5.Hastelloy G-3 TYPICAL MECHANICAL  PROPERTIES

(Annealed) 

Tensile Strength, ksi............................................................... 100 

MPa............................................................ 690 

Yield Strength (0.2% Offset), ksi...........................................47 

MPa..................................... 320 

Elongation, % ..............................................................................50