ERNiCr-4

ERNiCr-4 is used for GMAW(gas-shielded metal arc welding) and TIG welding of 50/50 nickel/chromium alloy, overlaying steel, cladding nickel-chromium alloy onto nickel-iron-chromium tubing and casting repair. It is also used primarily for boiler tube overlay in coal fired boiler systems.

Common Names: FM72M  Techalloy 72
Conformances: AWS A5.14, SFA-5.14, UNS N06072

CHEMICAL COMPOSITION(%)

Si 

Mn 

Ni 

0.01-0.1

    ≤0.2

   ≤0.2

≤0.01

≤0.01

Rest

Cr

Ti

Fe

Cu

Others

-

42-46

   0.3-1.0

  ≤0.5

≤0.5

<0.5

-

WELDING PARAMETERS

Process 

Diameter

Voltage

Amperage

Shielding Gas

TIG

.035”    (0.9mm)

.045”    (1.2mm)                    

1/16”    (1.6mm)                      

3/32”    (2.4mm)                   

1/8”     (3.2mm)

12-15         

13-16         

14-18         

15-20         

15-20 

60-90          

80-110        

90-130      

120-175    

150-220

100% Argon                         

100% Argon                         

100% Argon                         

100% Argon                         

100% Argon

MIG

.035”     (0.9mm)

.045”     (1.2mm)                  

1/16”     (1.6mm) 

26-29         

28-32         

29-33

150-190    

180-220     

200-250

75% Argon + 25% Helium      

75% Argon + 25% Helium      

75% Argon + 25% Helium

SAW

3/32”     (2.4mm)                    

1/8”      (3.2mm)                   

5/32”     (4.0mm)

28-30         

29-32         

30-33

275-350            

350-450            

400-550

Suitable Flux may be used     

Suitable Flux may be used      

Suitable Flux may be used



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